Wrong result printed on the screen when using #define SUM 1+3

Why doesn’t the code below print 16 ,0?

#define SUM 1+3
int main(void) {
    printf("%d %d\n", SUM*SUM, 4-SUM);
    return 0;
}

>Solution :

Because c treats that like x+y, not the result of that addition.
(if you want it to treat it like the result, simply put parentheses before and after the expression)

#define SUM (1+3)
int main() {
    printf("%d %d\n", SUM*SUM, 4-SUM);
    return 0;
}