这里我有枚举类:
enum class wahl {
schere , stein , papier
};
然后我重载运算符<和>
bool operator<(wahl &wahl1, wahl &wahl2) {
switch (wahl1) {
case wahl::papier: {
if (wahl2 == wahl::schere) {
return true; break;
} //papier < schere
else if (wahl2 == wahl::stein) {
return false; break;
} //papier > stein
else {
return false; break;
}
}
case wahl::schere: {
if (wahl2 == wahl::stein) {
return true; break;
} //schere < stein
else if (wahl2 == wahl::papier) {
return false; break;
} //schere > papier
else {
return false; break;
}
}
case wahl::stein: {
if (wahl2 == wahl::papier) {
return true; break;
} //stein < papier
else if (wahl2 == wahl::schere) {
return false; break;
} //stein > schere
else {
return false; break;
}
}
}
};
bool operator > (const wahl wahl1, const wahl wahl2) {
switch (wahl1) {
case wahl::papier: {
if (wahl2 == wahl::schere) {
return false; break;
}
// papier < schere
else if (wahl2 == wahl::stein) {
return true; break;
} //papier > stein
else {
return false; break;
}
}
case wahl::schere: {
if (wahl2 == wahl::stein) {
return false; break;
} //schere < stein
else if (wahl2 == wahl::papier) {
return true; break;
} //schere > papier
else {
return false; break;
}
}
case wahl::stein: {
if (wahl2 == wahl::papier) {
return false; break;
} //stein < papier
else if (wahl2 == wahl::schere) {
return true; break;
} //stein > schere
else {
return false; break;
}
}
}
};
我有另一个名为player的课程:
class player {
wahl pl_wahl;
int pl_score;
char* pl_name;
public:
player() {}
player(int score, wahl wahl, char* name) :
pl_wahl{ wahl }, pl_score{ score }, pl_name{ name } {}
wahl pl_get_wahl() {
return pl_wahl;
}
char* pl_get_name() {
return pl_name;
}
int &pl_get_score() {
return pl_score;
}
};
在这里我使用了比较器:
class game {
player game_player1, game_player2, game_momentan_gewinner;
int game_score_max;
public:
game() {}
game(player player1, player player2, int score_max) :
game_player1{player1},
game_player2{player2},
game_score_max{ score_max } {}
void vergleichen() {
if (game_player1.pl_get_wahl() > game_player2.pl_get_wahl()) {
game_momentan_gewinner = game_player1;
std::cout << "Gewinner dieser Runde ist Player 1 : " <<
game_momentan_gewinner.pl_get_name() << std::endl;
}
if (game_player1.pl_get_wahl() < game_player2.pl_get_wahl()) {
game_momentan_gewinner = game_player2;
std::cout << "Gewinner dieser Runde ist Player 2 : " <<
game_momentan_gewinner.pl_get_name() << std::endl;
}
else {
std::cout << "Remis" << std::endl;
}
}
};
我遇到的问题是enum将以int身份继续进行。如果我问比较两个枚举变量,结果将取决于int值而不是取值,我用重载运算符设置。
有没有办法,我可以阻止编译器使用枚举变量的int值,并在重载运算符中以我想要的方式比较枚举变量?
答案 0 :(得分:0)
如果使用正确的签名,则应该没问题:
c1 = 0;
M = bresenham_line([1 1 Nx/2+1 Ny+1]);
medium.sound_speed = c0*ones(Nx,Ny) - (c0*M) + c1*M;