Go4Expert - View Single Post - Why this program outputs 225 istead of 1 ?

karthigayan

The macro is substituted like the following ,

Code:

#include<stdio.h>
#define SQR(x) x * x
int main()
{

    printf("%d", 225/15*15);

}

Because of the operator precedence 225/15 executed first and have the result 17 .Then the 17 multiplied by 15 .So the result is 225.So use parenthesis .

karthigayan Go4Expert Member
31Mar2010,09:27
	The macro is substituted like the following , Code: #include<stdio.h> #define SQR(x) x * x int main() { printf("%d", 225/15*15); } Because of the operator precedence 225/15 executed first and have the result 17 .Then the 17 multiplied by 15 .So the result is 225.So use parenthesis .