C ++ Visual Studio“非标准语法"；使用“&"创建指向“成员"的指针 [英] C++ Visual Studio "Non-standard syntax; use '&' to create a pointer to member"

问题描述

我多次遇到此错误(错误C3867:非标准语法；使用&"创建指向成员的指针).我知道这个问题已经被问过很多次了，但我不知道为什么会发生此问题以及如何解决该问题.我已经阅读了很多指南，指针如何工作，并且尝试了新知识，但是我不知道如何正确地做.

I have a ran in to this error (error C3867: non-standard syntax; use '&' to create a pointer to member) a couple of times. I know this question has been asked a lot of times, but I don't get why the problem happens and what I can do to fix it. I've read a lot of guides how pointers work and I've tried to play with the new knowledge, but I don't know how to do it correctly.

对于这个问题，我编写了一个简单的代码.有人可以帮助我了解为什么会发生此错误以及如何解决此代码吗?

For this question I have made a simple code. Can someone help me understand why this error occurs and how to fix this code?

错误:错误C3867:"BankAccount :: amountOfMoney":非标准语法；使用&"创建指向成员的指针

Error: error C3867: 'BankAccount::amountOfMoney': non-standard syntax; use '&' to create a pointer to member

Source.cpp

#include <iostream>
#include <string>

#include "BankAccount.h"

using namespace std;

int main(){

    BankAccount bankAccount1("testName", 200.0);

    cout << bankAccount1.amountOfMoney << endl;

}

BankAccount.h

#pragma once
#include <string>

using namespace std;

class BankAccount
{
public:
    BankAccount();
    BankAccount(string name, double money);
    ~BankAccount();
    double amountOfMoney();

private:
    string name;
    double money;
};

BankAccount.cpp

#include "BankAccount.h"


BankAccount::BankAccount()
{
}

BankAccount::BankAccount(string n, double m) {
    name = n;
}

BankAccount::~BankAccount()
{
}

double BankAccount::amountOfMoney() {
    return money;
}

推荐答案

您忘记了函数调用运算符().将您的main代码更改为:

You forgot the function call operator (). Change your main code to:

int main(){

    BankAccount bankAccount1("testName", 200.0);

    cout << bankAccount1.amountOfMoney() << endl;

}

在没有括号的情况下，它尝试打印成员函数的地址，除非该函数不是类的成员，否则它无法执行此操作.

Without the parentheses it tries to print the address of a member function, which it is not able to do unless the function is not a member of a class.

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