一元运算符操作符重载

前置++

实例：

#include <iostream>using namespace std;/*单目运算符重载*/class Sigoptor{friend Sigoptor & operator++(Sigoptor & op);private:int a;int b;public:void operator--(){this->a--;this->b--;}Sigoptor(int a, int b){this->a = a;this->b = b;}void print(void){cout << a << "+" << b << "i" << endl;}};Sigoptor & operator++(Sigoptor & op){op.a++;op.b++;return op;}int main(){Sigoptor opp1(2, 3);++opp1;opp1.print();--opp1;opp1.print();system("pause");return 0;}