Transformations computer graphics on Geometric Figures using C++ Language

Write a program to Transformations computer graphics using C++ Language like ..

• Rotation
• Shear
• Translation
  

 #include  
 #include  
 #include  
 #include  
 class transformation  
 {  
   int edge,v[50],sx,sy,input[20][3],scale[3][3],result[20][3],clk,midx,midy;  
   float ang,scale1[3][3],result1[20][3];  
   public:  
   void input1()  
   {  
     clrscr();  
     cout<<"\nENTER NO OF EDGES";  
     while(1)  
     {  
       cin>>edge;  
       if(edge<3)  
         cout<<"\nEDGE SHOULD NOT LESS THAN 3";  
       else  
         break;  
     }  
     cout<<"\nENTER VERTICES";  
     int j=0;  
     for(int i=0;i<edge;i++) <br="">     {  
       cout<<"x-cordinate";  
       cin>>v[j];  
       input[i][0]=v[j++];  
       cout<<"y-cordinate";  
       cin>>v[j];  
       input[i][1]=v[j++];  
       input[i][2]=1;  
     }  
   }  
   void display()  
   {  
     clrscr();  
     int j=0;  
     midx=getmaxx()/2;  
     midy=getmaxy()/2;  
     setcolor(WHITE);  
     line(0,midy,2*midx,midy);  
     line(midx,0,midx,2*midy);  
     setcolor(BLUE);  
     for(int i=0;i<edge;i++) <br="">     {  
       if(edge-i!=1)  
         line(v[j]+midx,midy-v[j+1],v[j+2]+midx,midy-v[j+3]);  
       else  
         line(v[j]+midx,midy-v[j+1],v[0]+midx,midy-v[1]);  
       j=j+2;  
     }  
     getch();  
   }  
   void display1()  
   {  
     int j=0;  
     midx=getmaxx()/2;  
     midy=getmaxy()/2;  
     setcolor(WHITE);  
     line(0,midy,2*midx,midy);  
     line(midx,0,midx,2*midy);  
     setcolor(GREEN);  
     for(int i=0;i<edge;i++) <br="">     {  
       if(edge-i!=1)  
         line(result[j][0]+midx,midy-result[j][1],result[j+1][0]+midx,midy-result[j+1][1]);  
       else  
         line(result[j][0]+midx,midy-result[j][1],result[0][0]+midx,midy-result[0][1]);  
       j=j+1;  
     }  
     getch();  
   }  
   void display2()  
   {  
     int j=0;  
     midx=getmaxx()/2;  
     midy=getmaxy()/2;  
     setcolor(WHITE);  
     line(0,midy,2*midx,midy);  
     line(midx,0,midx,2*midy);  
     setcolor(BLUE);  
     for(int i=0;i<edge;i++) <br="">     {  
       if(edge-i!=1)  
         line(result1[j][0]+midx,midy-result1[j][1],result1[j+1][0]+midx,midy-result1[j+1][1]);  
       else  
         line(result1[j][0]+midx,midy-result1[j][1],result1[0][0]+midx,midy-result1[0][1]);  
       j=j+1;  
     }  
     getch();  
   }  
   void refx()  
   {  
     scale[0][0]=1;  
     scale[0][1]=scale[1][0]=0;  
     scale[1][1]=-1;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void refy()  
   {  
     scale[0][0]=-1;  
     scale[0][1]=scale[1][0]=0;  
     scale[1][1]=1;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void refo()  
   {  
     scale[0][0]=-1;  
     scale[0][1]=scale[1][0]=0;  
     scale[1][1]=-1;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void refxy()  
   {  
     scale[0][1]=1;  
     scale[0][0]=scale[1][1]=0;  
     scale[1][0]=1;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void refxy1()  
   {  
     scale[0][1]=-1;  
     scale[0][0]=scale[1][1]=0;  
     scale[1][0]=1;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void shear()  
   {  
     cout<<"SHEAR X FACTOR";  
     cin>>sx;  
     cout<<"SHEAR Y FACTOR";  
     cin>>sy;  
     scale[0][1]=sy;  
     scale[1][0]=sx;  
     scale[0][0]=scale[1][1]=1;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void scal()  
   {  
     cout<<"SCALE X FACTOR";  
     cin>>sx;  
     cout<<"SCALE Y FACTOR";  
     cin>>sy;  
     scale[0][1]=scale[1][0]=0;  
     scale[0][0]=sx;  
     scale[1][1]=sy;  
     scale[0][2]=scale[1][2]=scale[2][0]=scale[2][1]=0;  
     scale[2][2]=1;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void trans()  
   {  
     cout<<" X FACTOR";  
     cin>>sx;  
     cout<<" Y FACTOR";  
     cin>>sy;  
     scale[0][0]=scale[1][1]=scale[2][2]=1;  
     scale[0][1]=scale[0][2]=scale[1][0]=scale[1][2]=0;  
     scale[2][0]=sx;  
     scale[2][1]=sy;  
     multiply(input,scale,result);  
     display();  
     display1();  
   }  
   void rot()  
   {  
     cout<<"\nENTER THE ANGLE";  
     cin>>ang;  
     cout<<"\nENTER DIRECTION\n1. ANTICLOCKWISE\n2.CLOCKWISE";  
     cin>>clk;  
     scale1[0][0]=scale1[1][1]=cos((ang*3.14)/180);  
     scale1[0][2]=scale1[1][2]=scale1[2][0]=scale1[2][1]=0;  
     scale1[2][2]=1;  
     if(clk==1)  
     {  
       scale1[0][1]=sin((ang*3.14)/180);  
       scale1[1][0]=-sin((ang*3.14)/180);  
     }  
     else  
     {  
       scale1[0][1]=-sin((ang*3.14)/180);  
       scale1[1][0]=sin((ang*3.14)/180);  
     }  
     multiply1(input,scale1,result1);  
     display();  
     display2();  
   }  
   void rot1()  
   {    int x,y;  
     cout<<"\nENTER THE ANGLE";  
     cin>>ang;  
     cout<<"\nenter the x and y coordinates about which to rotate";  
     cin>>x;  
     cin>>y;  
     cout<<"\nENTER DIRECtION\nENTER 1 FOR ANTICLOCKWISE";  
     cin>>clk;  
     scale1[0][0]=scale1[1][1]=cos((ang*3.14)/180);  
     scale1[0][2]=scale1[1][2]=0;  
     scale1[2][0]=((-x)*cos((ang*3.14)/180)+y*sin((ang*3.14)/180)+y);  
     scale1[2][1]=((-x)*sin((ang*3.14)/180)-y*cos((ang*3.14)/180)+y);  
     scale1[2][2]=1;  
     if(clk==1)  
     {  
       scale1[0][1]=sin((ang*3.14)/180);  
       scale1[1][0]=-sin((ang*3.14)/180);  
     }  
     else  
     {  
       scale1[0][1]=-sin((ang*3.14)/180);  
       scale1[1][0]=sin((ang*3.14)/180);  
     }  
     multiply1(input,scale1,result1);  
     display();  
     display2();  
   }  
   void multiply(int input[][3],int b[][3],int result[][3])  
   {  
     int i=0;  
     for(i=0;i<edge;i++) <br="">     {  
       result[i][0]=input[i][0]*b[0][0]+input[i][1]*b[1][0]+input[i][2]*b[2][0];  
       result[i][1]=input[i][0]*b[0][1]+input[i][1]*b[1][1]+input[i][2]*b[2][1];  
       result[i][2]=input[i][0]*b[0][2]+input[i][1]*b[1][2]+input[i][2]*b[2][2];  
     }  
   }  
   void multiply1(int input[][3],float b1[][3],float result1[][3])  
   {  
     int i=0;  
     for(i=0;i<edge;i++) <br="">     {  
       result1[i][0]=input[i][0]*b1[0][0]+input[i][1]*b1[1][0]+input[i][2]*b1[2][0];  
       result1[i][1]=input[i][0]*b1[0][1]+input[i][1]*b1[1][1]+input[i][2]*b1[2][1];  
       result1[i][2]=input[i][0]*b1[0][2]+input[i][1]*b1[1][2]+input[i][2]*b1[2][2];  
     }  
   }  
 };  
 void main()  
 {  
   int gd=DETECT,gm;  
     initgraph(&gd,&gm,"c:\\tc\\bgi");  
   int ch;  
   transformation t;  
   do  
   {  
     clrscr();  
     cout<<"\n main menu";  
     cout<<"\n1.input";  
     cout<<"\n2.display";  
     cout<<"\n3.scaling";  
     cout<<"\n4.translation";  
     cout<<"\n5.rotation";  
     cout<<"\n6.reflection";  
     cout<<"\n7. shear";  
     cout<<"\n8. exit";  
     cout<<"\n enter ur choice";  
     cin>>ch;  
     switch(ch)  
     {  
       case 1:  
         cout<<"\ninput";  
         t.input1();  
         break;  
       case 2:  
         cout<<"\ndisplay";  
         t.display();  
         break;  
       case 3:  
         cout<<"\nscaling";  
         t.scal();  
         break;  
       case 4:  
         cout<<"\ntranslation";  
         t.trans();  
         break;  
       case 5:  
         int ch1;  
         do  
         {  
           clrscr();  
           cout<<"\nrotation\n1.about origin\n2.arbitary point\n3.return";  
           cin>>ch1;  
           switch(ch1)  
           {  
             case 1:  
               cout<<"\nabout origin";  
               t.rot();  
               break;  
             case 2:  
               cout<<"\narbitary point";  
               t.rot1();  
               break;  
             case 3:  
               break;  
           }  
         }while(ch1!=3);  
         break;  
       case 6:  
         do  
         {  
           clrscr();  
           cout<<"\n menu";  
           cout<<"\n1. reflection about x axix";  
           cout<<"\n2. reflection about y axix";  
           cout<<"\n3.reflection about origin";  
           cout<<"\n4.refletion about y=x line";  
           cout<<"\n5.reflection about y=-x line";  
           cout<<"\n6.exit";  
           cout<<"\n enter ur choice";  
           cin>>ch1;  
           switch(ch1)  
           {  
             case 1:  
               cout<<"\nreflection about x axix";  
               t.refx();  
               break;  
             case 2:  
               cout<<"\nreflection about y axix";  
               t.refy();  
               break;  
             case 3:  
               cout<<"\nreflection about origin";  
               t.refo();  
               break;  
             case 4:  
               cout<<"\nrefletion about y=x line";  
               t.refxy();  
               break;  
             case 5:  
               cout<<"\nreflection about y=-x line";  
               t.refxy1();  
               break;  
             case 6:  
               break;  
           }  
         }while(ch1!=6);  
         break;  
        case 7:  
         cout<<"\nshear";  
         t.shear();  
         break;  
        case 8:  
         break;  
     }  
   }while(ch!=8);  
 }

Operator Overloading on String Functions C++ Language

Write a program to perform Operator Overloading on String Functions using C++ Language . String Operations like

• Input String
• Concatenation String
• Reverse String
• Display String
• Equality String
• String Copy

 All these Functions should be implemented by Operator Overloading on String Functions C++ Language .

  Operator Overloading on String Functions Code

 #include  
 #include  
 #include  
 #include  
 class sub;  
 class overlod  
 {  
   char *p;  
   int len;  
   public:  
   overlod()  
   {  
     len=0;  
     p=new char[20];  
   }  
   overlod(char *s)  
   {  
     len=strlen(s);  
     p=new char[len+1];  
   }  
   void input()  
   {  
     cout<<"\nENTER THE STRING";  
     cin>>p;  
   }  
   void operator<<(overlod s1)  
   {  
     cout<<s1.p; <br="">     getch();  
   }  
   friend overlod operator+(overlod &s,overlod &t)  
     {  
       overlod temp;  
       temp.len=s.len+t.len;  
       temp.p=new char[temp.len+1];  
       strcpy(temp.p,s.p);  
       strcat(temp.p,t.p);  
       return temp;  
     }  
   int operator=(overlod s2)  
   {  
     int i;  
     i=strcmp(p,s2.p);  
     return i;  
   }  
   void operator==(overlod s3)  
   {  
     len=strlen(s3.p);  
     p=new char[len+1];  
     strcpy(p,s3.p);  
   }  
   void operator>>(overlod s1)  
   {  
     strrev(s1.p);  
     cout<<s1.p; <br="">     getch();  
     strrev(s1.p);  
   }  
   int operator -()  
   {  
     int i=0,j;  
     j=strlen(p)-1;  
     for(i=0;i<=j;i++,j--)  
     {  
         if((*(p+i))!=(*(p+j)))  
           return 0;  
     }  
     return 1;  
   }  
 };  
 void main(void)  
 {  
   overlod s1,s2,s3;  
   int ch,i;  
   do  
   {  
     clrscr();  
     cout<<"\nSTRING OPERATION"<<"\n1.INPUT"<<"\n2.CONCATENATION"<<"\n3.REVERSE"<<"\n4.DISPLAY STRING"<<"\n5.EQUALITY"<<"\n6.STRING COPY"<<"\n7.PALLINDROME"<<"\n8.EXIT";  
     cout<<"\n ENTER UR CHOICE";  
     cin>>ch;  
     clrscr;  
     switch(ch)  
     {  
       case 1:  
         cout<<"\ninput";  
         s1.input();  
         s2.input();  
         break;  
       case 2:  
         cout<<"\nCONCATENATION OF STRING1 & STRING2 IS:";  
         s1<<s1+s2; <br="">         break;  
       case 3:  
         cout<<"\nREVERSE STRING OF STRING IS:";  
         s2>>s1;  
         break;  
       case 4:  
         cout<<"\nDISPLAYING STRING";  
         s2<<s1; <br="">         break;  
       case 5:  
         i=(s1=s2);  
         if(i!=0)  
           cout<<"NOT EQUAL";  
         else  
           cout<<"EQUAL";  
         getch();  
         break;  
       case 6:  
         cout<<"\nCOPIED STRING IS:";  
         s3==s1;  
         s2<<s3; <br="">         break;  
       case 7:  
         i=-s1;  
         if(i!=0)  
           cout<<"\nSTRING IS PALINDROME";  
         else  
           cout<<"\nSTRING IS NOT PALINDROME";  
         getch();  
         break;  
       case 8:break;  
       default:  
         cout<<"\nINVALID CHOICE";  
     }  
   }while(ch!=8);  
 }

#include  
 #include  
 #include  
 #include  
 #include  
 class algo  
 {  
   float x1,x2,y1,y2;  
   public:  
   int sign(float a)  
   {  
   if(a>0)  
     return 1;  
   if(a<0)  
     return -1;  
   return 0;  
   }  
 void dda(float,float,float,float);  
 void br_line(float,float,float,float);  
 void br_c(float,float,float);  
 };  
 void main()  
 {  
   algo a;  
   int ch,gdriver=DETECT,gmode;  
   initgraph(&gdriver,&gmode,"c:\\tc\\bgi");  
   do  
   {  
     cleardevice();  
     cout<< "\n\t\t\t#### MAIN MENU ####";  
     cout<< "\n\t\t1.DDA LINE DRAWING ALGORITHM";  
     cout<< "\n\t\t2.BRESENHAM LINE DRAWIG ALGORITHM";  
     cout<< "\n\t\t3.BRESENHAM CIRCLE DRAWNG ALGORITHM";  
     cout<< "\n\t\t4.EXIT";  
     cout<< "\n\t\tENTER UR CHOICE:";  
     cin>> ch;  
     clrscr();  
     switch(ch)  
     {  
       case 1:  float x2,x1,y2,y1;  
         cout<< "\n\t\tDDA LINE DRAWING ALGO";  
         cout<< "\n\tEnter (x1,y1) co-ordinates of first point:";  
         cin>>x1>>y1;  
         cout<< "\n\tEnter (x2,y2) co-ordinates. of last point:";  
         cin>>x2>>y2;  
         a.dda(x1,y1,x2,y2);  
         getch();  
         break;  
       case 2:  cout<< "\n\t\tBRESENHAM LINE DRAWIG ALGO";  
         cout<< "\n\tEnter (x1,y1) co-ordinates of first point";  
         cin>>x1>>y1;  
         cout<< "\n\tEnter (x2,y2) co-ordinates of end point";  
         cin>>x2>>y2;  
         a.br_line(x1,y1,x2,y2);  
         getch();  
         break;  
       case 3:  cout<< "\n\t\tBRESENHAM CIRCLE DRAWNG ALGO";  
         cout<< "\n\tEnter center co-ordinates.";  
         cin>>x1>>y1;  
         float r;  
         cout<< "\n\tEnter radius";  
         cin>>r;  
         a.br_c(x1,y1,r);  
         getch();  
         break;  
       case 4:  break;  
       default:cout<< "\t\tInvalid Choice\n";  
         getch();  
         break;  
     }  
   }while(ch!=4);  
   closegraph();  
 }  
 void algo:: dda(float x1,float y1,float x2,float y2)  
 {  
   float dx,dy,len,i,xn,yn,x,y,midx,midy;  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   line(0,midy,2*midx,midy);  
   line(midx,0,midx,2*midy);  
   x1+=midx;  
   y1=-y1;  
   y1+=midy;  
   x2+=midx;  
   y2=-y2;  
   y2+=midy;  
   dx=abs(x2-x1);  
   dy=abs(y2-y1);  
   if(dx>=dy)  
     len=dx;  
   else  
     len=dy;  
   dx=(x2-x1)/len;  
   dy=(y2-y1)/len;  
   x=x1+0.5*sign(dx);  
   y=y1+0.5*sign(dy);  
   putpixel(x,y,WHITE);  
   i=1;  
   while(i<=len)  
   {  
     putpixel(x,y,RED);  
     x=x+dx;  
     y=y+dy;  
     i++;  
   }  
   getch();  
 }  
 void algo:: br_line(float x1,float y1,float x2,float y2)  
 {  
   float dx,dy,s1,s2,e,i,change,x,y,midx,midy,x3,y3,exch;  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   line(0,midy,2*midx,midy);  
   line(midx,0,midx,2*midy);  
   x1+=midx;  
   y1=-y1;  
   y1+=midy;  
   x2+=midx;  
   y2=-y2;  
   y2+=midy;  
   x=abs(x2-x1);  
   y=abs(y2-y1);  
   x3=x1;  
   y3=y1;  
   s1=sign(x2-x1);  
   s2=sign(y2-y1);  
   e=2*y-x;  
   if(y>x)  
   {  
     int temp=x;  
     x=y;  
     y=temp;  
     exch=1;  
   }  
   else  
     exch=0;  
   i=1;  
   while(i<=x)  
   {  
     putpixel(x3,y3,WHITE);  
     while(e>=0)  
     {  
       if(exch==1)  
         x3+=s1;  
       else  
         y3+=s2;  
       e=e-2*x;  
     }  
     if(exch==1)  
       y3+=s2;  
     else  
       x3+=s1;  
     e=e+2*y;  
     i++;  
   }  
 }  
 void algo:: br_c(float a,float b,float r)  
 {  
   float d,x,y,midx,midy;  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   line(0,midy,2*midx,midy);  
   line(midx,0,midx,2*midy);  
   x+=midx;  
   y=-y;  
   y+=midy;  
   x1=0,y1=r;  
   d=3-2*r;  
   while(x1<=y1)  
   {  
     if(d<0)  
     {  
       d=d+4*x1+6;  
     }  
     else  
     {  
       d=d+4*(x1-y1)+10;  
       y1=y1-1;  
     }  
     x1=x1+1;  
     putpixel(x1+a+(getmaxx()/2),y1+b+(getmaxy()/2),BLUE);  
     putpixel(y1+a+(getmaxx()/2),x1+b+(getmaxy()/2),BLUE);  
     putpixel(-x1+a+(getmaxx()/2),-y1+b+(getmaxy()/2),BLUE);  
     putpixel(-x1+a+(getmaxx()/2),y1+b+(getmaxy()/2),BLUE);  
     putpixel(y1+a+(getmaxx()/2),-x1+b+(getmaxy()/2),BLUE);  
     putpixel(-y1+a+(getmaxx()/2),x1+b+(getmaxy()/2),BLUE);  
     putpixel(x1+a+(getmaxx()/2),-y1+b+(getmaxy()/2),BLUE);  
     putpixel(-y1+a+(getmaxx()/2),-x1+b+(getmaxy()/2),BLUE);  
   }  
 }

Graphics Editor code Using C++ Language

Write a Graphics Editor program to develop a graphics editor which includes features like  line draw, rectangle draw,circle draw, pie chart draw,ellipse draw,polygon draw,bard raw, pixel draw,text draw etc.

Graphics Editor have a menu for user interaction from which user can provide input to program.By selecting appropriate option user will get output.

Graphics Editor code

 
 #include  
 #include  
 #include  
 #include  
 #include  
 class figures  
 {  
   int x1,y1,x2,y2,rad,xrad,yrad,startang,endang,midx,midy;  
   public:  
   figures()  
   {  
     x1=0;  
     y1=0;  
     x2=0;  
     y2=0;  
     rad=0;  
     xrad=0;  
     startang=0;  
     endang=0;  
     midx=getmaxx();  
     midy=getmaxy();  
   }  
       ~figures()  
   {  
   void linedraw(void);  
   void rectangledraw(void);  
   void circledraw(void);  
   void piechartdraw();  
   void ellipsedraw(void);  
   void polygondraw(void);  
   void bardraw(void);  
   void pixeldraw(void);  
   void textdraw(void);  
 };  
 void figures::linedraw(void)  
 {  
   int gd=DETECT,gm;  
   cout<<"x1 is ";  
   cin>>x1;  
   cout<<"y1 is ";  
   cin>>y1;  
   cout<<"x2 is ";  
   cin>>x2;  
   cout<<"y2 is ";  
   cin>>y2;  
   getch();  
   clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"A LINE");  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   setcolor(YELLOW);  
   line(x1+midx,midy-y1,x2+midx,midy-y2);  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::rectangledraw(void)  
 {  
   int gd=DETECT,gm;  
   cout<<"x1 is ";  
   cin>>x1;  
   cout<<"y1 is ";  
   cin>>y1;  
   cout<<"x2 is ";  
   cin>>x2;  
   cout<<"y2 is ";  
   cin>>y2;  
   getch();  
   clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"A RECTANGLE");  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   setcolor(YELLOW);  
   rectangle(x1+midx,midy-y1,x2+midx,midy-y2);  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::circledraw(void)  
 {  
   int gd=DETECT,gm;  
   cout<<"CENTER POINTS"<<endl; <br="">   cout<<"x1 is ";  
   cin>>x1;  
   cout<<"y1 is ";  
   cin>>y1;  
   cout<<"r is ";  
   cin>>rad;  
   getch();  
   clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"A CIRCLE"); //use setaspestratio  
   setcolor(YELLOW);  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   setcolor(YELLOW);  
   circle(x1+midx,midy-y1,rad);  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::ellipsedraw()  
 {  
   int gd=DETECT,gm;  
   cout<<"CENTER POINTS"<<endl; <br="">   cout<<"x1 is ";  
   cin>>x1;  
   cout<<"y1 is ";  
   cin>>y1;  
   cout<<"horizontal axis is ";  
   cin>>xrad;  
   cout<<"vertical axis is ";  
   cin>>yrad;  
   cout<<"starting angle is ";  
   cin>>startang;  
   cout<<"ending angle is ";  
   cin>>endang;  
   getch();  
   clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"AN ELLIPSE");  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   setcolor(YELLOW);  
   ellipse(x1+midx,midy-y1,startang,endang,xrad+midx,midy-yrad);  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::piechartdraw(void)  
 {  
   int gd=DETECT,gm,d=0,i,sum=0;  
   int a[10];  
   cout<<"how many data you want to enter"<<endl; <br="">   cin>>d;  
   for(i=0;i<d-1;i++) <br="">   {  
     cout<<"percentage of data  "<<i+1<<" =="<<endl;  
     cin>>a[i];  
     sum=sum+a[i];  
   }  
   a[i]=100-sum;  
   cout<<" percentage="" of="" data="" "<<i+1<<"="=" "<<100-sum<<endl;="" <br="">   getch();  
   clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"A PIECHART");  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   startang=0;  
   endang=0;  
   for(i=0;i<d;i++) <br="">   {  
     startang=endang;  
     endang=startang+(a[i]*360)/100;  
     setfillstyle(SOLID_FILL,i+3);  
     pieslice(midx,midy,startang,endang,150);  
   }  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::polygondraw()  
 {  
   int gd=DETECT,gm;  
   int poly[20],i=0;  
   char other;  
   cout<<"Enter vertices of the polygon"<<endl; <br="">   do  
   {  
     cout<<"x is ";  
     cin>>poly[i];  
     poly[i]=poly[i]+318;  
     i++;  
     cout<<"y is ";  
     cin>>poly[i];  
     poly[i]=-poly[i]+237;  
     i++;  
     cout<<endl<<"want to="" enter="" again";="" <br="">     cin>>other;  
   }while(other=='y');  
   //closing polygon  
   poly[i++]=poly[0];  
   poly[i]=poly[1];  
   clrscr();  
    i=(i+1)/2;  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(RED);  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   setfillstyle(SOLID_FILL,GREEN);  
    //use fillpoly to fill color  
    fillpoly(i,poly);//drawpoly(number of point we have entered,array);  
    getch();  //includes closing point also therefore i+1  
   cleardevice();  
   closegraph();  
 }  
 void figures::bardraw()  
 {  
   int gd=DETECT,gm,d=0,i,a[10],sum=0;  
     cout<<"how many data you want to enter"<<endl; <br="">   cin>>d;  
   for(i=0;i<d-1;i++) <br="">   {  
     cout<<"percentage of data  "<<i+1<<" =="<<endl;  
     cin>>a[i];  
         sum=sum+a[i];  
   }  
     a[i]=100-sum;  
     cout<<" percentage="" of="" data="" "<<i+1<<"="=" "<<100-sum<<endl;="" <br="">     getch();  
     clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"A BARGRAPH");  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
     for(i=0;i<d;i++) <br="">   {  
         setfillstyle(SOLID_FILL,i+3);  
         bar(45*(i+1)+midx,midy-((a[i]*100)/100),midx+(45*(i+1))+20,midy);    //(width,height,dist from y axis,bottom down)  
   }  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::pixeldraw(void)  
 {  
   int gd=DETECT,gm;  
   cout<<"x1 is ";  
   cin>>x1;  
   cout<<"y1 is ";  
   cin>>y1;  
   getch();  
   clrscr();  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   midx=getmaxx()/2;  
   midy=getmaxy()/2;  
   setcolor(4);  
   outtextxy(20+x1,20+y1,"A PIXEL");  
   line(0,midy,midx*2,midy);  
   line(midx,0,midx,2*midy);  
   setcolor(YELLOW);  
   outtextxy(midx+x1,midy-y1,"(x1,y1)");  
   putpixel(midx+x1,midy-y1,YELLOW);  
   getch();  
   cleardevice();  
   closegraph();  
 }  
 void figures::textdraw() //graphics textstyle //cprintf  
 {  
   int gd=DETECT,gm;  
   initgraph(&gd,&gm,"c:\\tc\\bgi");  
   for(int i=0;i<4;i++)  
   {  
     textmode(i);  
     cout<<"C";  
     getch();  
   }  
   closegraph();  
 }  
 void main(void)  
 {  
   figures draw;  
   int ch,ch1,i,n;  
   clrscr();  
   do  
   {  
     clrscr();  
     draw.menu();  
     cin>>ch;  
     switch(ch)  
     {  
       case 1:  
         clrscr();  
         cout<<"HOW MANY LINE U WANT:";  
         cin>>n;  
         for(i=0;i<n;i++) <br="">           draw.linedraw();  
         break;  
       case 2:  
         clrscr();  
         cout<<"HOW MANY LINE U WANT:";  
         cin>>n;  
         for(i=0;i<n;i++) <br="">           draw.circledraw();  
         break;  
       case 3:  
         clrscr();  
         draw.ellipsedraw();  
         break;  
       case 4:  
         clrscr();  
         draw.piechartdraw();  
         break;  
       case 5:  
         clrscr();  
         draw.polygondraw();  
         break;  
       case 6:  
         clrscr();  
         draw.bardraw();  
         break;  
       case 7:  
         cout<<"HOW MANY LINE U WANT:";  
         cin>>n;  
         for(i=0;i<n;i++) <br="">           draw.pixeldraw();  
         break;  
       case 8:  
         draw.rectangledraw;  
         break;  
       case 9:  
         draw.textdraw();  
         break;  
       case 10:  
         break;  
       default:  
         cout<<"\nINVALID CHOICE";  
         }  
     }while(ch!=9);  
 getch();  
 }

Weather report program in c++ using constructor

Create a class named weather report that holds a daily weather report with data members dayofmonth,high temp , low temp ,amount rain and amount snow.The constructor initializes the fields with default values. Weather report program in c++ using constructor Includes a function that prompts the user and sets values for each field so that you can override the default values.

Write a program Weather report program in c++ using constructor that creates a monthly report.

 Weather report program in c++ using constructor Code

 #include  
 #include  
 #include  
 class ping  
 {  
     int day,snowfall,rainfall,lowtemp,hightemp;  
     public:  
       static int count ;         
       ping();            
       ping(int,int,int,int,int);      
       ping::ping(ping &z)         
       {  
         day=z.day;  
         hightemp=z.hightemp;  
         lowtemp=z.lowtemp;  
         snowfall=z.snowfall;  
         rainfall=z.rainfall;  
       }  
       int dayno();  
       void daily();  
       void copy(int,int,int,int,int) ;  
       void change(int );  
 };  
 int ping::count ;  
 ping::ping()  
 {  
     day=99;  
     hightemp=999;  
     lowtemp=-999;  
     snowfall=0;  
     rainfall=0;  
     cout<< "\t\t\tRecord created\n";  
 }  
 void ping::change(int dom)  
 {  
   day=dom;  
 }  
 ping::ping(int dom,int ht,int lt,int s,int r)  
 {  
     day= dom;  
     hightemp=ht;  
     lowtemp=lt;  
     snowfall=s;  
     rainfall=r;  
 }  
 void ping::daily()  
 {  
     cout << "\t ";  
     cout << hightemp << "\t\t ";  
     cout << lowtemp << "\t ";  
     cout << snowfall << "\t ";  
     cout << rainfall << "\t ";  
 }  
 int ping::dayno()  
 {  
     return day;  
 }  
 void main()  
 {  
     int ch,i=0,j,flag=0;  
     int k,temp;  
     ping *array[31];  
     do  
       {  
         clrscr();  
         cout << "\t\t\t\t***Main Menu***\n";  
         cout << "\t\t\t\t1.Create Daily Report\n";  
         cout << "\t\t\t\t2.Display Daily Report\n";  
         cout << "\t\t\t\t3.Display Monthly Report\n";  
         cout << "\t\t\t\t4.Delete a record\n";  
         cout << "\t\t\t\t5.Exit\n";  
         cout << "\t\t\t\tEnter your choice:\n";  
         cin >> ch;  
         switch(ch)  
           {  
               case 1:  
                   do  
                   {  
                     int dom;  
                     temp=0 ;  
                     cout<<"\n\t\tEnter date of month: ";  
                     cin>>dom;  
                     array[i]->count++;  
                     if(array[i]->count>1)  
                     {  
                           cout <<"\nDO U WANT TO COPY DATA FROM PREVIOUS DAY (y/n)";  
                           if(getche()=='y'||getche()=='Y')  
                           {  
                                 array[i]=new ping;  
                                 *array[i]=*array[i-1];  
                                 array[i]->change(dom);  
                                 i=i+1;  
                                 temp=1;  
                           }  
                     }  
                     if(temp==0)  
                     {  
                         int ht ;  
                         cout << "\tEnter maximum temperature: ";  
                         cin >> ht;  
                         int lt;  
                         cout << "\tEnter the minimum temperature: ";  
                         cin >> lt;  
                         int s;  
                         cout << "\tEnter amount of snowfall: ";  
                         cin >> s;  
                         int r;  
                         cout << "\tEnter amount of rainfall: ";  
                         cin >> r ;  
                         array[i++]=new ping(dom,ht,lt,r,s);  
             }  
             cout<<"\n\t\tDO U WANT TO ENTER MORE:";  
         }while(getche()=='y'||getche()=='Y');  
           break;  
       case 2:  
           cout << "\t\t\tDisplay Daily Report\n";  
           cout << "\tEnter the day to be viewed: ";  
           cin>>k;  
           for(j=0;j<i;j++) <br="">             if(array[j]->dayno()==k)  
             {  
               cout<<"\n\n   Day Temperature  AmtRain AmtSnow";  
               cout<<"\n"<<"     ";  
               array[j]->daily();  
               getch();  
               break;  
             }  
           if(j==i)  
           {  
             cout<<"\nRecord not found ";  
             cout<<"\nNOT AVAILABLE";  
             getch();  
           }  
           break;  
       case 3:  
           clrscr();  
           cout<<"\n\t\tWEATHER REPORT";  
           if(i==0)  
           {  
             cout<<"\n\nRecord not found...";  
             break;  
           }  
           else  
             cout<<"\n\n   Day Temperature  AmtRain AmtSnow";  
             cout<<"\n"<<"     ";  
           for(j=0;j<i;j++) <br="">           {  
             cout<<"\n"<<"     ";  
             array[j]->daily();  
           }  
           getch();  
           break;  
           break;  
       case 4:  
           cout<<"\nENTER THE DATE WHICH U WANT TO DELETE:";  
           int dom;  
           cin>>dom;  
           for(j=0;j<i;j++) <br="">           {  
               if(array[j]->dayno()==dom)  
               {  
                 delete array[j];  
                 while(j<i) <br="">                 {  
                   array[j]=array[j+1];  
                   j++;  
                 }  
                 j--;  
                 break;  
               }  
             }  
             if(j==i)  
               cout<<"\nDATE IS NOT FOUND";  
             else  
               {  
                 array[i]->count--;  
                 i--;  
               }  
               break;  
       case 5 :  
           break ;  
       default:  
           cout<< " \t\tWrong choice...Enter again\n ";  
     }  
   }while(ch!=5);  
 }