Question

我的代码：

#include <iostream>
using namespace std;
int main ()
{
    // Declare named constants for tax and tip rates
    const double TIP_RATE = 0.20; // 20%
    const double TAX_RATE = 0.0675; // 6.75%

    // Declare variables for inputs and results
    double mealCharge;
    double tax, tip, totalBill; // Results

    // Initialize all input variables
    cout << "What is the cost of the meal?: $ ";
    cin >> mealCharge;

    tip = mealCharge * TIP_RATE;
    tax = mealCharge * TAX_RATE;
    totalBill = mealCharge + tip + tax;

    cout << "Your meal cost is: $ " << mealCharge << endl;
    cout << "Your tax amount is: $ " << tax << endl;
    cout << "The tip you should pay is: $ " << tip << endl;
    cout << "Your total cost for the meal is: $ " << totalBill << endl;

    return 0;
}

错误消息：

复制符号_main in：

/Users/*******/Library/Developer/Xcode/DerivedData/C++_Error_Resolution-eiuslwrjycbgywdfhqxyxsmklwep/Build/Intermediates/C++ Error Resolution.build/Debug/C++ Error Resolution.build/Objects-normal/x86_64/main.o

/Users/********/Library/Developer/Xcode/DerivedData/C++_Error_Resolution-eiuslwrjycbgywdfhqxyxsmklwep/Build/Intermediates/C++ Error Resolution.build/Debug/C++ Error Resolution.build/Objects-normal/x86_64/fixingErrors.o
ld: 1 duplicate symbol for architecture x86_64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

每当我尝试在xcode上编写和构建程序时，我就在xcode中编写了大量的javascript文件而没有任何问题。我知道windows pc的编码优越，但在我看来，xcode应该能够处理一个非常基本的C ++程序。

有没有办法解决这个问题，还是我必须将笔记本电脑带到苹果公司，看看他们能做些什么呢？

Answer 1

正如@aschepler所说，您将main.o和fixingErrors.o链接在一起，每个对象定义main。

将两个目标文件（对于这个简单的示例不必要，但对于更复杂的示例非常有用）链接在一起，但是不能将两个定义相同功能的目标文件链接在一起。

当我尝试构建和运行C ++程序时获取xcode错误代码

1 个答案: