Simple C program output 2

[Mogali]

Hi,
I am new to C Program
What is the out put of this program ?
When I executed the output is 2 for c and 6 for d.
Can u tell me reason why it's so.
#include<stdio.h>

void main()
{
int a = 2, b = 6, c, d;

c = a,b;
d = (a,b);

printf("|n The value of c is: %d", c);
printf("|n The value of d is: %d", d);
}
Thanks in advance.

 

[feherke]

Hi

It is simply matter of operator precedence.

Feherke.

http://rootshell.be/~feherke/

 

[normeus]

c = a,b;

"," is an operator so first evaluate " c = a " then evaluate the 2nd part of the statement "b".

d = (a,b);

first evaluate the stuff in the parentesis "( 2,6)"

From "THE C PROGRAMMING LANGUAGE" K&R:
"A pair of expressions separated by a comma is evaluated left to right, and the type and value of the result are the type and value of the right operand."

so "d" becomes 6