[Code] Estrazione dei match della fantacoppa
Inviato: 16 ott 2007, 16:29uno dei vantaggi del codice aperto è la completa trasparenza di ciò che avviene. Per dimostrarlo, per cogliere un'occasione di parlare un po di programmazione, e per fare un po gli sboroni, ecco il codice del programmino che ha estratto gli incontri per la nostra fantacoppa
- Codice: Seleziona tutto
thrantir@Rivendell:~/workspace/fantacalcio$ cat estrazione.cc
#include <fstream>
#include <list>
#include <iostream>
#include <stdexcept>
#include <ctime>
struct Team {
Team(const std::string & a_name, int an_id)
: name(a_name)
, id(an_id)
{}
std::string name;
int id;
};
typedef std::list<Team> Teams;
typedef std::pair<Team, Team> Match;
typedef std::list<Match> Matches;
Teams the_teams;
Matches the_matches;
void readTeams(const std::string & file_name);
void printTeams();
void extractMatches();
void printMatches();
int main() {
readTeams("teams.dat");
//printTeams();
extractMatches();
printMatches();
return EXIT_SUCCESS;
}
void readTeams(const std::string & file_name) {
std::ifstream file(file_name.c_str());
std::string line;
if(!file.good()) {
throw std::runtime_error("no team file");
}
while(!file.eof()) {
getline(file, line);
if(line.length() > 0) {
int index = line.find('|');
if(index != std::string::npos) {
std::string my_name = line.substr(index+1, line.length() - index) ;
int my_id = atoi(line.substr(0, index).c_str());
the_teams.push_back(Team(my_name, my_id));
}
}
}
}
void printTeams() {
Teams::const_iterator my_iter = the_teams.begin();
Teams::const_iterator my_end = the_teams.end();
for( /* void */;
my_iter != my_end;
++my_iter) {
std::cout << "team " << my_iter->id << " " << my_iter->name << std::endl;
}
}
void extractMatches() {
if((the_teams.size() % 2) != 0 ) {
perror("squadre dispari!!!");
}
srand(time(0));
while( the_teams.size() > 0) {
//long long my_rand = rand();
int my_choose = (the_teams.size() * (rand() / (RAND_MAX + 1.0)));
Teams::iterator my_iter = the_teams.begin();
for (/* void */; my_choose > 0 ; --my_choose) ++my_iter;
Team first(*my_iter);
the_teams.erase(my_iter);
my_choose = (the_teams.size() * (rand() / (RAND_MAX + 1.0)));
my_iter = the_teams.begin();
for (/* void */; my_choose > 0 ; --my_choose) ++my_iter;
Team second(*my_iter);
the_teams.erase(my_iter);
the_matches.push_back(std::make_pair(first, second));
}
}
void printMatches() {
Matches::const_iterator my_iter = the_matches.begin();
Matches::const_iterator my_end = the_matches.end();
for( /* void */;
my_iter != my_end;
++my_iter) {
std::cout << "match: " << my_iter->first.name << " - " << my_iter->second.name << std::endl;
}
}
)
