#include<stdio.h>

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

void setup() {

}

void loop() {
  int a, b, c;
  int result;
  printf("Enter three numbers separated by spaces: \n");
  scanf("%d %d %d", &a, &b, &c);
  printf("a = %d, b = %d, c = %d\n",a,b,c);
  result = addnum(a, b, c);
  printf("RESULT: %d\n",result);
}