Swap variable value without using temporary variable

Q : Write a C program to swap the values of two variables without using the temporary variable?

Answer :

#include<stdio.h>

#include<conio.h>

/*##########################

     Girfa Student Help

     Swap two variable without

     temporary variable

  ##########################*/

void main()

{

     int a,b;

     clrscr();

     a=10;

     b=20;

     printf("A=%d\tB=%d",a,b);

     a=a+b;

     b=a-b;

     a=a-b;

     printf("\nA=%d\tB=%d",a,b);

     getch();

}

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