C program to Swap two strings - My CS Tutorial

C program to swap to strings using  string library function.
We will swap two strings.
In this post we will discuss how to write a c program source code to swap two strings using string library function.
In the first user enter two strings then the compiler show the result before swapping and after swapping.

C program code

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

 char st1[20],st2[20],st3[20];

 clrscr();

 printf("\n ENTER FIRST STRING:\n ");

 gets(st1);

 printf("\n ENTER SECOND STRING:\n ");

 gets(st2);

 printf("\n BEFORE SWAPPING STRINGS ARE:\n ");

 printf("\n FIRST STRING : %s\n ",st1);

 printf("\n SECOND STRING : %s\n",st2);

 strcpy(st3,st1);

 strcpy(st1,st2);

 strcpy(st2,st3);

 printf("\n AFTER SWAPPING STRINGS ARE:\n ");

 printf("\n FITST STRING : %s\n",st1);

 printf("\n SECOND STRING : %s\n",st2);

getch();

}

OUTPUT:

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Created by-- HARSH CHAUHAN