1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
// WRONG (naïve way)
#define add_five(n) n + 5
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
// TRICKY!!!!
printf("add_five(100) * 20 == %d\n", add_five(100) * 20); // print add_five(100) * 20 == 200 (!!!!!!)
// Preprocessor will replace add_five(100) * 20 with 100 + 5 * 20
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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