void funcao(int *a, int *b);

int main(void) {
    int x=2, y=5;
    funcao(&x, &y);
    int *p1=&x;     
    *p1 = y + 4;
    printf("%d", x + y);
    system("pause");
}

void funcao(int *a, int *b) {
     *a = *a + 2;
     *b = *b + 1;
}