Question

Write a program in C using strcat function.

Answer 1

⭐char strg1[40] = "Hello";

/*

  returns a pointer (which is discarded) to the string literal

  "Hello World" and now strg1 contains "Hello World"

*/

strcat(strg1, " World");  

/*  

 returns a pointer (which is discarded) to the string

 to "Hello World :)" and now strg1 contains "Hello World :)"

*/

strcat(strg1, " :)");

strcat("Yello", " World"); // wrong

#include<stdio.h>

#include<string.h>

int main()

{

   char strg1[40];

   char strg2[40];

   printf("Enter first string: ");

   gets(strg1);

   printf("Enter second string: ");

   gets(strg2);

   printf("\nConcatenating first and second string .. \n\n");

   strcat(strg1, strg2);

   printf("First string: %s\n", strg1);

   printf("Second string: %s", strg2);

   // signal to operating system program ran fine

   return 0;

}

char *my_strcat(char *strg1, char *strg2)

{

   char *start = strg1;

   while(*strg1 != '\0')

   {

       strg1++;

   }

   while(*strg2 != '\0')

   {

       *strg1 = *strg2;

       strg1++;

       strg2++;

   }

   *strg1 = '\0';

   return start;

}

Answer 2

Program in "C" using "strcat" Function

#include <stdio.h>

#include <string.h>

main()

{

   char s1[20], s2[20];

   printf("\nEnter first string: ");

   gets(s1);

   printf("\nEnter second string: ");

   gets(s2);

   strcat(s1, s2);

   printf("\nThe concatenated string is: %s", s1);

   getch();

}

The output will be as follows:

Enter first string: Programming

Enter second string: .com

The concatenated string is: Programming.com