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

define is just a string substitution.

The answer to your question after that is order of operations:

FTIMES(j+5) = 1+5*5 = 26

FTIMES((j+5)) = (1+5)*5 = 30