is not a class or namespace name

I know this question has been asked and answered before, but none of the solutions 开发者_如何学JAVAseem to have worked for me, and my compiler is acting really weird with this error.

When I try and compile my code I get numerous errors such as these:

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

I encountered this kind of error when compiling my project before, but it mystically disappeared. I was trying to fix the problem, and after a while it just started to work again after I reverted all of my changes.

I think this may be a problem with my precompiled header, as this error popped up after I had tried to fix an error with my PCH not working properly.

Here is my code (and I know it isn't that well designed, just trying to get it to work at the moment :P):

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;
}

PCH (i.e stdafx.h) should be included first in the .cpp file. So do this:

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

See these topics:

• About stdafx.h missing in my compiler(mingw32 on windows)
• What does this MSVC++ compile error mean