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

#define add_five(n)  (n + 5)    // fixed by wrapping entire expression in parentheses
#define triple(n)    ((n) * 3)  // fixed by also wrapping each parameter in parentheses

int main(int argc, char* argv[]) {
    printf("add_five(100)== %d\n",  add_five(100) );  // print add_five(100) == 105
    // Preprocessor will replace  add_five(100)  with 100 + 5

    printf("add_five(100) * 20 == %d\n",  add_five(100) * 20);  // ⇒ (add_five(100) * 20) == 200
    // Preprocessor will replace  add_five(100) * 20  with  (100 + 5) * 20
    
    // OK
    printf("triple(100) == %d\n", triple(100));

    // FIXED
    printf("triple(100 + 100) == %d  // FIXED\n", triple(100 + 100));
    // Preprocessor will replace triple(100 + 100)  with  (100 + 100 * 3)
    // Expected 600 but will actually get 400.

    return EXIT_SUCCESS;
}
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