/*Write an assembly function that performs the sum of four constants 
10, 20, 30 and 40, and returns the result.*/

void setup() {
  Serial1.begin(115200);
}

extern "C" {
  int my_asm_add_four_constants(int a, int b, int c, int d);
}

int main() {
  printf("%i\n", my_asm_add_four_constants(10, 20, 30, 40));
}