Thread: Swap two numbers without using temp variable

Code:

void swap_num(int *a,int *b)
{
*a = *a^*b; *b = *a^*b; *a = *a^*b;
}

Code:

void main()
{
int a=10,b=20;
a=a+b;
b=a-b;
a=a-b;
}