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

extern "C" {
  int inc_by_1(int n);
}

int main()
{
  int n, result;
  printf("Enter a number: ");
  scanf("%d", &n);
  printf("%d",n);
  result = inc_by_1(n);
  printf("\nThe incremented number is: %d\n", result);
  return 0;
}