C #define macros

Question

Here is what i have and I wonder how this works and what it actually does.

#define NUM 5
#define FTIMES(x)(x*5)

int main(void) {
    int j = 1;
    printf(\         


        

Answer 1

Since it hasn't been mentioned yet, the way to fix this problem is to do the following:

#define FTIMES(x) ((x)*5)

The parentheses around x in the macro expansion prevent the operator associativity problem.