c++ - 如何修复 Element 在 C++ 中有无效值 "/Yu"错误？

Question

我正在自学，我想知道如何在我的控制台应用程序中使用预编译 header 。我已经阅读了很多指南，似乎我做的一切都是正确的，但我仍然会出错。

我使用 visual studio 2019。所以我有 main.cpp 文件，其中包含使用的代码和我想预编译的库。我创建了一个名为 stdafx.h 的文件，并在其中包含了所有库。然后我创建了仅包含 stdafx.h 的 stdafx.cpp。在 stdafx.cpp 预编译器 header 的项目属性中是/Yc，对于 main 来说是/Yu。

stdafx.h:

#include <iostream>
#include <cmath>

stdafx.cpp:

#include "stdafx.h"

主要.cpp:

#include "stdafx.h"
using namespace std;

double getInfoFromUser()
{
    double info;
    cin >> info;
    return info;
}

double computeSqrtDiscriminant(double A, double B, double C)
{
    double i{ sqrt(pow(B, 2) - 4 * A * C) };
    return i;
}

double computeX1(double A, double B, double SqrtDiscriminant)
{
    double X1{ (-B + SqrtDiscriminant) / (2 * A) };
    return X1;
}

double computeX2(double A, double B, double SqrtDiscriminant)
{
    double X2{ (-B - SqrtDiscriminant) / (2 * A) };
    return X2;
}

void computePoint1(double X1, double K, double M)
{
    double Y{ X1 * K + M };
    cout << "Первая точка пересечения:[" << X1 << "," << Y << "]" << endl;
}

void computePoint2(double X2, double K, double M)
{
    double Y{ X2 * K + M };
    cout << "Вторая точка пересечения:[" << X2 << "," << Y << "]";
}

double equateX(double B, double K)
{
    double NewB{ B - K };
    return NewB;
}

double equateC(double C, double M)
{
    double NewC{ C - M };
    return NewC;
}

int main()
{
    setlocale(LC_ALL, "rus");
    cout << "Введите уравнение параболы (aх^2+bx+c=0):" << endl;
    cout << "Введите a:";
    double A{ getInfoFromUser() };
    cout << "Введите b:";
    double B{ getInfoFromUser() };
    cout << "Введите c:";
    double C{ getInfoFromUser() };
    cout << "Введите уравнение прямой (Kx+m)" << endl;
    cout << "Введите k:";
    double K{ getInfoFromUser() };
    cout << "Введите m:";
    double M{ getInfoFromUser() };
    B = equateX(B, K);
    C = equateC(C, M);
    double SqrtDiscriminant = computeSqrtDiscriminant(A, B, C);
    double X1{ computeX1(A, B, SqrtDiscriminant) };
    double X2{ computeX2(A, B, SqrtDiscriminant) };
    computePoint1(X1, K, M);
    if (X1 != X2)
    {
        computePoint2(X2, K, M);
    }
    return 0;
}

main.cpp 即使没有预编译头文件也能很好地编译，但我想学习如何使用它们。如果使用预编译头文件编译，我会得到以下两个错误:错误:元素具有无效值“/Yu”。错误 MSB6011:в задачу Microsoft.Build.CPPTasks.CL переданы недопустимые параметры。(我来自乌克兰，所以我使用俄语本地化)。

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Answer 1

所以问题是我在文件的属性中手动输入了/Yu 和/Yc，尽管右上角有 dropbox-box。如果您使用保管箱，问题就会消失。