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我想按字母順序用字符串值填充數組。它已經與整數工作。我認爲問題不在於排序,而在於顯示它。按字母和顯示值對字符串數組進行排序
但這裏是代碼:
#include <iostream>
#include <algorithm>
using namespace std;
class Ticket {
int ticketnr;
string name;
public:
Ticket() {
ticketnr = 0;
name = "NN";
};
Ticket(int _tickernr, string _name) {
ticketnr = _tickernr;
name = _name;
}
friend bool upSort(Ticket a, Ticket b);
};
bool upSort(Ticket a, Ticket b) {
return (a.name > b.name);
}
int main() {
Ticket vip(1435, "Beckenbauer");
Ticket frei;
Ticket array[10] = {vip, Ticket(2100, "Maier")};
sort(array, array + 10, upSort);
for (int i = 0; i < 10; i++) cout << array[i] << endl;
}
Xcode中說:無效的操作數爲二進制表達
謝謝你和問候 弗洛
你必須提供一個重載運算符'你類。 –