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

#define add_5(n) n + 5    // WRONG
#define add_5(n) (n + 5)  // BETTER:  wrap entire RHS expression in parentheses
// This is not right yet, even though it will work some of the time.

int main(int argc, char* argv[]) {
    int n = 5;
    int n_plus_5_times_100 = add_5(n) * 100;  // expect 1000
    // After preprocessor, this line ↑ turns to this:
    // int n_plus_5 = n + 5 * 100;  // actually get:  505
    // LESSON:  Preprocessor is just simple text replacement.  It doesn't care about
    //          operator precedence.

    printf("n_plus_5_times_100 == %d\n", n_plus_5_times_100);
    
    return EXIT_SUCCESS;
}
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