004
18.08.2005, 11:07 Uhr
virtual
Sexiest Bit alive
(Operator)
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Ich würde nicht lange fakeln und ein Highscore als ein Set von Highscore_entries auffasssen, dafür entsprechende Eingabe- ausgabe- und Vergleichsroutien definieren. Der Rest ist dann ein kinderpsiel:
Im folgenden Benötigte Includes:
| C++: |
#include <iostream>
#include <string>
#include <set>
#include <fstream>
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Klasse, die einen Highscoreeintrag abbildet:
| C++: |
class highscore_entry {
private:
std::string player;
unsigned score;
public:
highscore_entry(const std::string& player_ = "", unsigned score_ = 0) :player(player_), score(score_) { }
const std::string& get_player() const { return player; }
unsigned get_score() const { return score; }
void set_player(const std::string& player_) { player = player_; }
void set_score(unsigned score_) { score = score_; }
};
bool operator < (const highscore_entry& a, const highscore_entry& b) {
return a.get_score() < b.get_score();
}
std::ostream& operator << (std::ostream& out, const highscore_entry& entry) {
out<<entry.get_score()<<'/'<<entry.get_player()<<std::endl;
return out;
}
std::istream& operator >> (std::istream& in, highscore_entry& entry) {
unsigned score;
std::string player;
in>>score;
in.ignore(1);
getline(in, player);
entry.set_player(player);
entry.set_score(score);
return in;
}
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Klasse die einen Highscore abbildet, nur Grundgerüst, aber Funktionokkelnd:
| C++: |
class highscore {
std::set<highscore_entry, std::greater<highscore_entry> > entries;
public:
typedef std::set<highscore_entry, std::greater<highscore_entry> >::const_iterator const_iterator;
typedef std::set<highscore_entry, , std::greater<highscore_entry> >::iterator iterator;
void insert(const highscore_entry& entry) {
entries.insert(entry);
while (entries.size()>10) { // Behält max. 10 Einträge im Highscore
entries.erase(*entries.rbegin());
}
}
const_iterator begin() const {
return entries.begin();
}
const iterator end() const {
return entries.end();
}
iterator begin() {
return entries.begin();
}
iterator end() {
return entries.end();
}
};
std::ostream& operator << (std::ostream& out, const highscore& highscore) {
for(highscore::iterator i=highscore.begin(); i!=highscore.end(); ++i) {
out<<*i;
}
return out;
}
std::istream& operator >> (std::istream& in, highscore& highscore) {
do {
highscore_entry entry;
if (in>>entry) highscore.insert(entry);
} while (in);
return in;
}
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Anwendung:
| C++: |
int main() {
highscore h;
// Einlesen hightscore
std::ifstream in("highscore.txt");
if (in) {
in>>h;
}
in.close();
// Neuen Eintag einfügen.
std::cout<<"Bitte Punkte/Spieler eingeben, (also zB: 7/Player A): "<<std::endl;
highscore_entry entry;
std::cin>>entry;
h.insert(entry);
// Highscore wegschreiben
std::ofstream out("highscore.txt");
out<<h;
// Highscore ausgeben
std::cout<<"Der Highscore momentan: "<<std::endl
<<h;
}
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--
Gruß, virtual
Quote of the Month
Ich eß' nur was ein Gesicht hat (Creme 21) |
\Test.txt",ios::out);
