C program to swap two numbers without using third variable

source code

#include<stdio.h>

int main()

{

int a=5,b=10;

//process one

a=b+a;

b=a-b;

a=a-b;

printf("a= %d  b=  %d",a,b);//process two

a=5;b=10;

a=a+b-(b=a);

printf("\na= %d  b=  %d",a,b);

//process three

a=5;b=10;

a=a^b;

b=a^b;

a=b^a;

printf("\na= %d  b=  %d",a,b);

//process four

a=5;b=10;

a=b-~a-1;

b=a+~b+1;

a=a+~b+1;

printf("\na= %d  b=  %d",a,b);

//process five

a=5,b=10;

a=b+a,b=a-b,a=a-b;

printf("\na= %d  b=  %d",a,b);

return 0;

}