write a program to interchange two variables without using 3rd one?

Answer 1

//c++ program
#include
#include
void main()
{
printf("\nEnter two numbers");
int a,b;
cin>>a>>b;
a^=b^=a^=b; // interchanging variables without using temp.

// beauty is, it in "single line"

printf("\n\n%d %d",a,b);
}

Answer 2

NOTE: the XOR swap technique only works with integer types (byte, char, int, long)! This will not work with float or double types.

Answer 3

add the two variables, then subtract to swap.

a = a+ b;
b= a-b; //which is= a+b-b, that gives the value of a
a= a-b; // which is= a-a-b, that produces the value of b

Answer 4

this is how to swap them simply, if you want more information please contact me?!

you can apply it on any language?!

x = x xor y
y = x xor y
x = x xor y

Answer 5

int a,b
a=a+b
b=a-b
a=a-b

Answer 6

80x86 assembly:
swap eax,ebx

Tada!