使用类、私有、public、构造函数、函数、整数和字符串的程序进一步学习

Question

在我的 c++ class 中，我们的任务是不断将不同方面构建到此代码中。我目前遇到 2 个错误，并且卡在我不知道自己做错了什么的地方。该程序将私家车或字符串作为名称和一个私有整数输入到游戏中，检查是否可被 3、5 以及 3 和 5 整除。我将在 class 获取输入值并输出它们。我基本上已经弄清楚了这个程序，但它不会编译，我真的不确定为什么。这是我的代码：

#include <iostream>
#include <iomanip>
using namespace std;
using std::istream;

// declare the max size the username input can be
const int MAX = 14;

enum FIZZBUZZ { ABORT = 0, FIZZBUZZ, FIZZ, BUZZ };


class CFizzbuzz                              // Class definition at global scope
{
    // make sure our constructor, destructor, plus member functions are
    // all public and available from outside of the class.
public:

    CFizzbuzz() {}              // Default constructor definition
    ~CFizzbuzz() {}             // Default destructor definition


                                // function members that are public

                                // get the user's name and their value from the console and
                                // store those results into the member variables.
    void getFizzbuzz()
    {
        cout << "Please enter your name: " << endl;
        cin >> m_myName;

        cout << "Please enter your number for the FizzBuzz game: " << endl;
        cin >> m_myNum;
    }

    // return the user's number type entered
    int putFizzBuzz()
    {
        return m_myNum;
    }

    char* getName()
    {
        return m_myName;
    }

    // logic to check to see if the user's number is 0, fizz, buzz, or     fizzbuz
    int getRecord(int num)
    {
        if (num == 0)
        {
            return ABORT;
        }
        else if (num % 5 == 0 && num % 3 == 0)  // fizzbuzz number
        {
            return FIZZBUZZ;
        }
        else if (num % 5 == 0)  // buzz number
        {
            return BUZZ;
        }
        else if (num % 3 == 0)  // fizz number
        {
            return FIZZ;
        }
        else
            return num;
    }

    // private data members only available inside the class
private:
    int     m_myNum;
    char    m_myName[MAX];
};


int main()
{
    CFizzbuzz   myClass;


    cout << "Welcome to my Fizzbuzz game, you are to guess the location of a "
        << "number which if is divisible by 5 and 3 you will win with "
        << "the output of Fizzbuzz. " << endl;
    cout << "Please enter an integer value between 0 and 3 "
        << "representing the row location of the number for the game, "
        << "then press the Enter key: " << endl;

    for (;;)
    {
        myClass.getFizzbuzz();

        int num = myClass.putFizzBuzz();
        switch (myClass.getRecord(num))
        {
        case ABORT:
            cout << myClass.getName() << "\nThank you for playing\n";
            system("PAUSE");
            return 0;   // exit program

        case FIZZ:
            cout << "Sorry, " << myClass.getName() << ", number is a Fizz, please try again.\n";
            break;

        case BUZZ:
            cout << "Sorry, " << myClass.getName() << ", number is a Buzz,    please try again.\n";
            break;

        case FIZZBUZZ:
            cout << "You win you got FizzBuzz!!!" << endl;
            break;

        default:
            cout << "Sorry, " << myClass.getName() << ", number is a not a Fizz, Buzz, or Fizzbuzz\nPlease try again.\n";
            break;
        }
    }
}

这些是我遇到的错误：

LNK2019, LNK1120

Answer 1

根据您在评论中提到的错误 (Unresolved external symbol _WinMain@16) 我会说您在 Visual Studio 中创建了一个 Win32 项目（一个 GUI 项目），但您的代码本来是一个控制台申请。

您需要将项目类型从 Win32 应用程序更改为控制台应用程序，方法是 re-recreating 或在项目设置中将子系统从 Windows 更改为控制台。有关后者的更多信息，请参阅以下 link：

https://msdn.microsoft.com/en-us/library/fcc1zstk.aspx

Answer 2

我会怀疑 else return num。输入 1 或 2 时会发生什么？显然，模数不会提供嘶嘶声或嗡嗡声，但根据您的枚举值，函数 getRecord() returns 会提供。我会将 NONE 枚举值设置为 -1 以指示它既不是嘶嘶声也不是嗡嗡声。

关于枚举值要记住的是，它在编译时解析为实际数字。因此，当您输入 1，并且模数不能证明是 fizz、buzz 或 fizzbuzz 而您 return 1 时，switch case 语句将解析为 fizzbuzz，即使情况并非如此（双关语意）。

就您评论说它没有按预期工作而言，请输入更多详细信息。

使用类、私有、public、构造函数、函数、整数和字符串的程序进一步学习

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使用 类、私有、public、构造函数、函数、整数和字符串的程序进一步学习

Program furthering learning using Classes, private, public, constructor, functions, integers, and strings

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使用类、私有、public、构造函数、函数、整数和字符串的程序进一步学习