#define printnum1(x) \
        printf("%d \n", x); \
        printf("%d \n", x)

void printnum2(int x) {
        printf("%d \n", x);
        printf("%d \n", x);
}

int main() {

        int i = 5;

        printf("printnum2: \n");
        printnum2(i++);
        printf("printnum1: \n");
        printnum1(i++);

        return 0;
}