#include <stdio.h>
#include <stdlib.h>

//#define TRIPLE(x) x * 3      // WRONG
#define TRIPLE(x) ((x) * 3)    // CORRECT

//#define ADD_5(x)    x + 5    // WRONG
// ADD_5(3) * 9  ⇒  x + 5 * 9
#define ADD_5(x)    ((x) + 5)  // CORRECT

// Rules for #define macros
// 1) Parenthesize each parameter in the definition.
// 2) Parenthesize entire experssion in the definition.

int main(int argc, char* argv[]) {

    printf("TRIPLE(5) ====== %d\n", TRIPLE(5));

    printf("TRIPLE(5 + 3) == %d\n", TRIPLE(5 + 3));
    // TRIPLE(5 + 3) ==> 5 + 3 * 3
    
    return EXIT_SUCCESS;
}
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