C++ 赋值运算符重载
就像您可以重载其他运算符一样,您也可以重载赋值运算符 (=),并且它可以用于创建一个对象,就像复制构造函数一样。
下面的示例演示了如何重载赋值运算符。
#include <iostream>
using namespace std;
class Distance {
private:
int feet; // 0 to infinite
int inches; // 0 to 12
public:
// required constructors
Distance() {
feet = 0;
inches = 0;
}
Distance(int f, int i) {
feet = f;
inches = i;
}
void operator = (const Distance &D ) {
feet = D.feet;
inches = D.inches;
}
// method to display distance
void displayDistance() {
cout << "F: " << feet << " I:" << inches << endl;
}
};
int main() {
Distance D1(11, 10), D2(5, 11);
cout << "First Distance : ";
D1.displayDistance();
cout << "Second Distance :";
D2.displayDistance();
// use assignment operator
D1 = D2;
cout << "First Distance :";
D1.displayDistance();
return 0;
}
当上述代码被编译并执行时,产生以下结果 –
First Distance : F: 11 I:10
Second Distance :F: 5 I:11
First Distance :F: 5 I:11