巨集
define => 就像是 ctrl+h 把左邊全部替換成右邊
原本
/*
example
*/
#define add(a, b) a + b
int main() {
printf("%d\n", add(3, 5) * add(3, 5));
}
執行時
/*
example
*/
#define add(a, b) a + b
int main() {
printf("%d\n", 3 + 5 * 3 + 5);
}
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