#include<stdio.h>
#include<stdlib.h>

void myPrint(char* fnName, unsigned int result);

extern "C" { 
 bool check_less (int, int);
}

void setup() {
  Serial1.begin(9600);
}

int main() 
{
  int sint_a = -6;
  int sint_b = -5;
  int result;
  if (result = check_less(sint_a, sint_b)){
  Serial1.println("sint_a is lower than sint_b.");
    myPrint("check_less()", result);
  }
  else {
    Serial1.println("sint_a is higher or equal than sint_b.");
    myPrint("check_less()", result);
  }
 
} 

void myPrint(char* fnName, unsigned int printVal){
  Serial1.print("The value returned from the assembly fn ");
  Serial1.print(fnName);
  Serial1.print(" : "); Serial1.println(printVal);
}