ZOJ 2321 Filling Out the Team

//2321Filling Out the Team#include <iostream>#include <stdio.h>#define FILE_DEBUG#ifdef FILE_DEBUG#include <fstream>#endifusing namespace std;int main(int argc, char *argv[]){#ifdef FILE_DEBUGifstream fin;fin.open("input.txt");cin.rdbuf(fin.rdbuf()); // assign file's streambuf to cin#ifdef _C_LAN_freopen("input.txt", "r", stdin);#endif#endif#ifdef FILE_DEBUGofstream fout;fout.open("output.txt");cout.rdbuf(fout.rdbuf()); // assign file's streambuf to cout#ifdef _C_LAN_freopen("output.txt", "w", stdout);#endif#endif      bool is_first;      double speed, weight, strength;      while (cin >> speed >> weight >> strength            && (speed || weight || strength))      {            is_first = true;            if (speed <= 4.5 && weight >= 150 && strength >= 200)            {                      cout << "Wide Receiver";                      is_first = false;            }            if (speed <= 6 && weight >= 300 && strength >= 500)            {                      if (is_first == false)                         cout << " ";                      cout << "Lineman";                      is_first = false;            }            if (speed <= 5 && weight >= 200 && strength >= 300)            {                      if (is_first == false)                         cout << " ";                      cout << "Quarterback";                      is_first = false;            }            if (is_first == true)            {                         cout << "No positions";            }            cout << endl;      }    return 0;}