C Program: Swaping of two Numbers using Comma Operator

Interchange or swaping of two values using comma operator :
 

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c;

clrscr();

a=10, b=20;

printf(" Before swaping :");

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

c=a, a=b, b=c;

printf(" /n");

printf(" After swaping :");

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

getch();

}

Output:

Before swaping :

a=10 and b=20

After swaping :

a=20 and b=10