c++ - 需要一些帮助解决两个错误 (C++)

Question

我已经起床写代码了，这可能是一个容易犯的错误，我只是因为缺乏 sleep 而忽略了，但问题发生在这段代码上。

do
{
    aWithIntAcct.enterAccountData();
    aWithIntAcct.getSavInfo();
    aWithIntAcct.getCheckingInfo();
    checkAcct.push_back(aWithIntAcct);
    cout << "Would you like to enter another Checking Account with interest? y or n ";
    cin >> quitChar;
}while(quitChar != QUIT);

它说我对“enterAccountData”的访问不明确(错误 C2385)这与未找到其他(错误 C3861)标识符相矛盾。

我的类(class)是继承的，所以我不确定为什么这个机构对我有用。有什么建议吗？

其余代码:

#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <string>
using namespace std;
template <class T>
void repeatValue(T val, int times)
{
for(int x = 0; x < times; x++)
{
    cout << "-";
}
};
template <class T>
void produceReport(int tableRows, string title, T acctType)
{
cout << tableRows << endl;
cout << title << endl;
cout << acctType;
};

class BankAccount
{
friend ostream& operator<<(ostream&, const BankAccount&);
friend istream& operator>>(istream&, BankAccount&);
private:
int acctNum;
double acctBal;
public:
BankAccount(int = 0,double = 0.0);

double operator+=(BankAccount);
int operator+(BankAccount);
friend bool operator>(BankAccount &acctBalOne, BankAccount &acctBalTwo);
friend bool operator<(BankAccount &acctBalOne, BankAccount &acctBalTwo);
int operator==(const BankAccount acctNumOne);
void enterAccountData();
void displayAccount();
void setAcctNum(int);
void setAcctBal(double);
int getAcctNum();
double getAcctBal();
};
BankAccount::BankAccount(int num, double bal)
{
acctNum = num;
acctBal = bal;
}
double BankAccount::operator+=(BankAccount bankAcct)
{
acctBal += acctBal + bankAcct.acctBal;
return acctBal;
}
int BankAccount::operator+(BankAccount newAcctNum)
{
const int INCREMENT = 1;
newAcctNum.acctNum = acctNum + INCREMENT;
return newAcctNum.acctNum;
}
bool operator>(BankAccount &acctBalOne, BankAccount &acctBalTwo)
{
return acctBalOne.acctBal > acctBalTwo.acctBal;
}
bool operator<(BankAccount &acctBalOne, BankAccount &acctBalTwo)
{
return acctBalOne.acctBal < acctBalTwo.acctBal;
}
int BankAccount::operator== (const BankAccount acctNumOne)
{
int truth = 0;
if(acctNum == acctNumOne.acctNum)
    truth = 1;
return truth;
}
ostream& operator<<(ostream& display, const BankAccount& aAcct)
{
display << "Account #" << aAcct.acctNum << endl;
display << "Account Balance $" << aAcct.acctBal << endl;
return display;
}
istream& operator>>(istream& dataIn, BankAccount& aAcct)
{
cout << endl << "Enter in an Account # ";
dataIn >> aAcct.acctNum;
cout << "Enter in an Account Balance $ ";
dataIn >> aAcct.acctBal;
return dataIn;
}
void BankAccount::enterAccountData()
{
cout << "Enter the Account:#";
cin >> acctNum;
cout << endl << "Enter the Account Balance:$";
cin >> acctBal;
}
void BankAccount::displayAccount()
{
cout << "The Account number is #" << acctNum << endl;
cout << "The Account Balance is $" << acctBal << endl;
}
void BankAccount::setAcctNum(int num)
{
acctNum = num;
}
void BankAccount::setAcctBal(double bal)
{
acctBal = bal;
}
int BankAccount::getAcctNum()
{
return acctNum;
}
double BankAccount::getAcctBal()
{
return acctBal;
}
class SavingsAccount : public BankAccount
{
friend ostream& operator<<(ostream&, const SavingsAccount&);
private:
double interest;
public:
SavingsAccount(double = 0.0);
void displaySavAccount();
void getSavInfo();
};
SavingsAccount::SavingsAccount(double intRate)
{
interest = intRate;
}
void SavingsAccount::getSavInfo()
{
cout << "Enter Interest Rate: ";
cin >> interest;
}
ostream& operator<<(ostream& display, SavingsAccount& aSavAcct)
{
aSavAcct.displaySavAccount();
return display;
}
void SavingsAccount::displaySavAccount()
{
cout << "     Savings information.     " << endl;
cout << "Interest Rate on the account is:" << interest << endl;
}
class CheckingAccount : public BankAccount
{
friend ostream& operator<<(ostream& display, const CheckingAccount& aCheckAcct);
private:
double monthlyFee;
int checksAllowed;
public:
CheckingAccount(double = 0,int = 0,int = 0,double = 0);
void displayCheckAccount();
void getCheckingInfo();
};
CheckingAccount::CheckingAccount(double fee, int allowed, int num, double bal) :      BankAccount(num,bal), monthlyFee(fee), checksAllowed(allowed)
{

}
void CheckingAccount::getCheckingInfo()
{
cout << "Enter monthly fee of the Account for the checking account. $";
cin >> monthlyFee;
cout << endl << "How many checks are allowed?" << endl;
cin >> checksAllowed;
}
ostream& operator<<(ostream& display, CheckingAccount& aCheckAcct)
{
aCheckAcct.displayCheckAccount();
return display;
}
void CheckingAccount::displayCheckAccount()
{
cout << "           Checking Information           " << endl;
BankAccount::displayAccount();
cout << "Monthly fee on the account is:$" << monthlyFee << endl;
cout << "Checks allowed for this account is: " << checksAllowed << endl;
}
class CheckingWithInterest : public SavingsAccount, public CheckingAccount
{
private:

public:
CheckingWithInterest();
void displayWithInterest();
};
CheckingWithInterest::CheckingWithInterest() : CheckingAccount(0,0,9999,0), SavingsAccount(0.03)
{}
void CheckingWithInterest::displayWithInterest()
{
CheckingAccount::displayCheckAccount();
SavingsAccount::displaySavAccount();
}
int main()
{
cout << fixed << setprecision(2);

unsigned count;
vector<SavingsAccount>savAcct;
SavingsAccount aSavAcct;
vector<CheckingAccount>checkAcct;
CheckingAccount aCheckAcct;
vector<CheckingWithInterest>withIntAcct;
CheckingWithInterest aWithIntAcct;
const char QUIT = 'n';
char quitChar = 'y';
cout << "Do you want to enter Savings Information? y or n ";
cin >> quitChar;
do
{
    aSavAcct.enterAccountData();
    aSavAcct.getSavInfo();
    savAcct.push_back(aSavAcct);
    cout << "Would you like to enter another Savings Account? y or n ";
    cin >> quitChar;
}while(quitChar != QUIT);
cout << "Do you want to enter Checking Information? y or n ";
cin >> quitChar;
do
{
    aCheckAcct.enterAccountData();
    aCheckAcct.getCheckingInfo();
    checkAcct.push_back(aCheckAcct);
    cout << "Would you like to enter another Checking Account? y or n ";
    cin >> quitChar;
}while(quitChar != QUIT);
cout << "Do you want to enter Checking with interest account Information? y or n ";
cin >> quitChar;
do
{
    aWithIntAcct.enterAccountData(); // error points here for both (Line 233)
    aWithIntAcct.getSavInfo();
    aWithIntAcct.getCheckingInfo();
    checkAcct.push_back(aWithIntAcct);
    cout << "Would you like to enter another Checking Account with interest? y or n ";
    cin >> quitChar;
}while(quitChar != QUIT);

sort(savAcct.begin(), savAcct.end());
for(count = 0; count < savAcct.size(); ++count)
{
    repeatValue(savAcct.at(count), count);
    cout << endl;
    produceReport(savAcct.size(), "Savings Account Information", savAcct.at(count));
}
sort(checkAcct.begin(), checkAcct.end());
for(count = 0; count < checkAcct.size(); ++count)
{
    repeatValue(checkAcct.at(count), count);
    cout << endl;
    produceReport(checkAcct.size(), "Checking Account Information", checkAcct.at(count));
}
sort(withIntAcct.begin(), withIntAcct.end());
for(count = 0; count < withIntAcct.size(); ++count)
{
    repeatValue(withIntAcct.at(count), count);
    cout << endl;
    produceReport(withIntAcct.size(), "Checking with interest Account Information",      withIntAcct.at(count));
}
system("pause");
return 0;
}

Answer 1

class BankAccount
class SavingsAccount : public BankAccount
class CheckingAccount : public BankAccount
class CheckingWithInterest : public SavingsAccount, public CheckingAccount

此继承层次结构(可能)不正确。现在它看起来像这样:

 BankAccount       BankAccount
      |                 |
SavingsAccount   CheckingAccount
      \                 /
      CheckingWithInterest

因此，每个 CheckingWithInterest 对象实际上有 两个 BankAccount 基类子对象:一个来自它的 SavingsAccount 基类子对象和一个来自其 CheckingAccount 基类子对象。

因此，当您尝试在 CheckingWithInterest 对象上调用 BankAccount 成员函数时，例如，

CheckingWithInterest account;
account.enterAccountData();

编译器不知道您指的是 BankAccount 中的 enterAccountData() 是 SavingsAccount 基类的一部分还是您表示 BankAccount 中的 enterAccountData()，它是 CheckingAccount 基类的一部分。

我不确定您的具体要求是什么，但是如果您只想拥有一个 BankAccount 基类子对象，您可能需要在派生 时使用虚拟继承BankAccount 中的 CheckingAccount 和 SavingsAccount，因此当它们在 CheckingWithInterest< 中组合时，BankAccount 子对象在它们之间共享:

class BankAccount
class SavingsAccount : public virtual BankAccount
class CheckingAccount : public virtual BankAccount
class CheckingWithInterest : public SavingsAccount, public CheckingAccount

如果您确实希望有两个 BankAccount 基类子对象，那么当您调用 enterAccountData() 时，您需要限定您想要的基类子对象调用成员函数:

account.CheckingAccount::enterAccountData();