Write a program to input two number from the user and then swap the value of these two variables by using third variable.

Here swap simply means interchanging the given data with each other by using third variable.

In the given program I’m going to input data in two variables and with the help of third variable I’m going to swap the data between two.

Let’s go through program.

#include<stdio.h>

void main();

{

int a, b, c;

 clrscr ();

  printf (“\n enter the first number”);

   scanf (“%d”, &a);

    printf (“\n enter the second number”);

     scanf (“%d”, &b);

       c=b ;

         b=a ;

          a=c ;

           printf (“\n a=%d”, a );

             printf (“\n b=%d”, b);

              getch ();

}

WORKING AND OUTPUT: -

Here c=b means those value which were inputted on ‘b’ will transfer to c and then b=a will helps in transfer of data 0f ‘a’ to ‘b’. And at last through a=c those value of ‘b’ which were transferred to ‘c’ will now transfer to ‘a’. Through this ‘a’ and ‘b’ will interchange and displays output as follows;

Enter the first number =

Enter the second number=

a=

b=