如果是私有的，可以从main调用一个方法吗？如果不是，怎么可能？ [英] Is it possible to call a method from main if it is private? If not, how would it be possible?

问题描述

我试图让这个程序开始运行，但目前我只是得到错误。我不知道如何让这个工作。如果我将类SavingsAccount更改为public应该没关系，但我需要保持原样。

I am trying to get this program to start running but currently I just get errors. I am not sure how to get this to work. If I change the class SavingsAccount to public it should be okay, but I am required to keep it as is.

问题出在主函数中。

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

class SavingsAccount
{
    int accountType;
    string ownerName;
    long ssn;
    double accountClosurePenaltyPercent, accountBalance;
    void Information();
    inline double AccountClosureLoss()
    {
        return (accountBalance * accountClosurePenaltyPercent);
    }
    void OutputInformation();

};

void SavingsAccount::Information()
{
    cout << "Enter Account Type (1 for Checking or 2 for Savings): ";
    cin >> accountType;
    cout << "Enter owner name: ";
    getline(cin, ownerName);
    cout << "Enter the Social Security Number: ";
    cin >> ssn;
    cout << "Enter the percent penalty for closing account(decimal form): ";
    cin >> accountClosurePenaltyPercent;
    cout << "Enter the account balance: ";
    cin >> accountBalance;
}

void SavingsAccount::OutputInformation()
{
    cout << "Account Type: " << endl;
    cout << "Name: " << ownerName << endl;
    cout << "SSN: " << ssn << endl;
    cout << "Account Closure Penaly %: " << accountClosurePenaltyPercent << endl;
    cout << "Account Balance: " << accountBalance;
}

int main(void)
{
    SavingsAccount.Information(); 
    SavingsAccount.AccountClosureLoss();
    SavingsAccount.OutputInformation();
    return 0;
}

到目前为止我尝试了多少。

What I tried so far.

int main(void)
    {
        SavingsAccount John;
        John.Information(); 
        John.AccountClosureLoss();
        John.OutputInformation();
        return 0;
    }

有任何建议吗？

推荐答案

很好的默认成员函数是私有的，所以你可以总是将它们添加到公共如下：

Well by default member functions are private, so you can always add them into public as follows:

class SavingsAccount
{
    private:
    int accountType;
    string ownerName;
    long ssn;
public:
    double accountClosurePenaltyPercent, accountBalance;
    void Information();
    inline double AccountClosureLoss()
    {
        return (accountBalance * accountClosurePenaltyPercent);
    }
    void OutputInformation();
};

您现在可以从主要电话呼叫。

You will now be able to call them from the main.

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