C macro, something weird

Question

Trying to figure out something simple in a C macro, like this code for example:

#include  
#define MACRO(b)  printf(\"%d\\n\", b*b)

int main(         


        

Answer 1

Put parentheses around your macro to evaluate arguments in the correct order:

#include  
#define MACRO(b)  printf("%d\n", (b)*(b))

int main()
{
    MACRO(4+1); 
}