#include <stdio.h>

static int data;

void set_data(int value)
{
  data = value;
}

int get_data()
{
  return data;
}

int percent_of_data(int max)
{
  int index;

  index = (int)(100.0 * (double) data / (double) max);
  return index;
}

main()
{
  int* result;

  result = new int;


  set_data(100);

  *result = percent_of_data(200);


  printf("result = %d\n", *result);
}