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我想按字母顺序用字符串值填充数组。它已经与整数工作。我认为问题不在于排序,而在于显示它。按字母和显示值对字符串数组进行排序
但这里是代码:
#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中说:无效的操作数为二进制表达
谢谢你和问候 弗洛
你必须提供一个重载运算符'你类。 –