Simple String Operations in C Language

Write a Simple String Operations program in C to perform String operations on strings using library functions

• Concatenate a string S3 to string S2.
• Copy a string S3 to another string S2.
• Find the length of a given string
• Compare two strings S2 and S3.

Simple String Operations Code

#include <stdio.h>
#include <string.h>
#include<conio.h>
#define MAXLEN 120
void main()
{
char string1[MAXLEN], string2[MAXLEN]; 
char result[MAXLEN]; 
int choice,activity;
int comparison;
clrscr();
while(1)
{

printf(“Enter your choice :\n”);

printf(“1. Enter the strings\n”);
printf(“2. To concatenate a string S2 to string S1\n”);
printf(“3. To find the length of a given string\n”);
printf(“4. To compare two strings S1 and S2.\n”);
printf(“5. To copy a string S2 to another string S1.\n”);
printf(“6. Display S1 and S2.\n”);
printf(“0. Exit \n\n”);
printf(“Your Choice: “);

scanf(“%d”, &choice);

switch(choice)
{

case 1:

printf(“Please enter first string (maximum length %d) \n”, MAXLEN – 1);
flushall();
gets(string1);

printf(“Please enter second string (maximum length %d) \n”, MAXLEN – 1);
flushall();
gets(string2);
break;
case 2:
strcat(string1, string2);

printf(“S1 now is :\n%s\n”, string1);

break;
case 3:
printf(“Please select a string to find length of\n”);

printf(“1. S1\n”);
printf(“2. S2\n”);
printf(“3. New string\n”);

scanf(“%d”, &activity);

switch(activity)
{
case 1:
printf(“The length is %d\n”, strlen(string1));

break;
case 2:
printf(“The length is %d\n”, strlen(string2));

break;
case 3:
printf(“Please enter new string (maximum length %d) \n”, MAXLEN – 1);
scanf(“%s”,result);
printf(“The length is %d\n”, strlen(result));

break;
}
break;
case 4:
comparison = strcmp(string1,string2);

if(comparison < 0)
{
printf(“S1 is lexicographically equal to S2\n”);

}
else if (comparison < 0)
{
printf(“S1 is lexicographically smaller than S2\n”);

}
else
{
printf(“S1 is lexicographically greater than S2\n”);

}
break;
case 5:
strcpy(string1, string2);

printf(“S1 is now :\n%s\n”, string1);

break;
case 6:
printf(“S1 is now :\n%s\n”, string1);
printf(“S2 is now :\n%s\n”, string2);
break;
case 0: exit();

}
printf(“\n\n”);
}
}