Question

我知道这个问题之前已经被问过并回答了，但是没有一个解决方案似乎对我有用，而且我的编译器对这个错误表现得非常奇怪。

当我尝试编译我的代码时，我会收到许多错误，例如：

Error   1   error C2653: 'TargetList' : is not a class or namespace name    c:\projects\arcturus\augmentedreality\targetlist.cpp    5   1   AugmentedReality
Error   2   error C2065: 'Target' : undeclared identifier   c:\projects\arcturus\augmentedreality\targetlist.cpp    5   1   AugmentedReality
Error   3   error C2146: syntax error : missing ')' before identifier 'target'  c:\projects\arcturus\augmentedreality\targetlist.cpp    5   1   AugmentedReality
Error   4   error C2059: syntax error : ')' c:\projects\arcturus\augmentedreality\targetlist.cpp    5   1   AugmentedReality
Error   5   error C2143: syntax error : missing ';' before '{'  c:\projects\arcturus\augmentedreality\targetlist.cpp    6   1   AugmentedReality
Error   6   error C2447: '{' : missing function header (old-style formal list?) c:\projects\arcturus\augmentedreality\targetlist.cpp    6   1   AugmentedReality

我之前在编译项目时遇到过这种错误，但它神秘地消失了。我试图解决这个问题，过了一会儿它恢复了我所有的变化后才开始工作。

我认为这可能是我的预编译头文件的问题，因为在我尝试修复错误后我的PCH无法正常工作时弹出此错误。

这是我的代码（我知道它不是设计得很好，只是试图让它在当下工作：P）：

的StdAfx.h

#pragma once

#define _USE_MATH_DEFINES
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <vector>

Target.h

#pragma once

#include "Position.h"
#include <string>
#include <vector>

class Target
{
public:
    Target();
    Target(std::string shortName, std::string longName, Position position);
    ~Target();

    bool UpdateTargetData(Position currentPosition);

    std::string mShortName;
    std::string mLongName;
    Position mPosition;
    double mDistance;
    double mHorizontalBearing;
    double mVerticalBearing;
};

Target.cpp

#include "Target.h"
#include "stdafx.h"

bool Target::UpdateTargetData(Position currentPosition)
{
    mDistance = currentPosition.GetDistance(mPosition);
    mHorizontalBearing = currentPosition.GetHorizontalBearing(mPosition);
    mVerticalBearing = currentPosition.GetVerticalBearing(mPosition);

    return true;
}

TargetList.h

#pragma once

#include "Target.h"

class TargetList
{
public:
    TargetList();
    ~TargetList();

    bool AddTarget(Target target);
    bool GetTarget(std::string shortName, Target& returnTarget);
    bool RemoveTarget(std::string shortName);

private:
    std::vector<Target> mTargets;
};

TargetList.cpp

#include "TargetList.h"
#include "Target.h"
#include "stdafx.h"

bool TargetList::AddTarget(Target target)
{
    if (GetTarget(target.mShortName, Target()) != false)
    {
        mTargets.push_back(target);
        return true;
    }

    return false;
}

bool TargetList::GetTarget(std::string shortName, Target& returnTarget)
{
    std::vector<Target>::iterator iterator;

    for (iterator = mTargets.begin(); iterator < mTargets.end(); iterator++)
    {
        if ((*iterator).mShortName == shortName)
        {
            returnTarget = (*iterator);
            return true;
        }
    }

    return false;
}

bool TargetList::RemoveTarget(std::string shortName)
{
    std::vector<Target>::iterator iterator;

    for (iterator = mTargets.begin(); iterator < mTargets.end(); iterator++)
    {
        if ((*iterator).mShortName == shortName)
        {
            mTargets.erase(iterator);
            return true;
        }
    }

    return false;
}

Answer 1

PCH（即stdafx.h）应首先包含在.cpp文件中。所以这样做：

#include "stdafx.h"     //this should be included first!
#include "TargetList.h"
#include "Target.h"

请参阅以下主题：

不是类或命名空间名称

1 个答案: