Question

write a program in c++ to interchange 2 values without the 3rd variable.

Answer 1

#include <stdio.h>

int main()

{

   printf("Hello world!\n");

   int a,b;

   printf("Enter the two number \n");

   scanf("%d%d",&a,&b);

   a=a+b;

   b=a-b;

   a=a-b;

   printf("%d%d",a,b);

   return 0;

}