Question

所以我仔细阅读了其他一些文章，但我似乎无法找到理由为什么这样做不会奏效。我是C ++的新手，请你好心。

// User Pay.cpp : Defines the entry point for the console  application.
// This program calculates the user's pay.

#include "stdafx.h"
#include <iostream>
using namespace std;

int main()
{
    double hours, rate, pay;

    // Get the number of hours worked.
    cout << "how many hours did you work? ";
    cin >> hours;

    // Get the hourly pay rate.
    cout << "How much do you get paid per hour? ";
    cin >> rate;

    //C alculates the Pay.
    pay = hours * rate;

    // Display the pay.
    cout << "You have earned $" << pay << endl;

    return 0;
}

Answer 1

您不需要包含#include“stdafx.h”。

未来更好的做法是不要包含整个std库（“using namespace std”）。而不是这个你可以直接调用std :: cout，std :: cin等...

在“返回0”之前，代码末尾的系统（“PAUSE”）调用也会有所帮助（在您的示例中）。因此，当程序执行时，控制台不会关闭，您可以看到结果。

代码示例：

#include <iostream>
//using namespace std;

int main()
{
    double hours, rate, pay;

    // Get the number of hours worked.
    std::cout << "how many hours did you work? ";
    std::cin >> hours;

    // Get the hourly pay rate.
    std::cout << "How much do you get paid per hour? ";
    std::cin >> rate;

    //C alculates the Pay.
    pay = hours * rate;

    // Display the pay.
    std::cout << "You have earned $" << pay << std::endl;

    system("PAUSE");
    return 0;
}

Answer 2

尝试创建一个空项目（取消选中预编译的头文件）。然后复制你的代码，但删除#include＆＃34; stdafx.h＆＃34;。

Answer 3

看起来好像有错误，然后添加：

`using namespace std;`

现在应该没有错误。

CIN，COUT未确定标识符

3 个答案: