Question

这是我的源文件之一ThreeDGraph.cpp：

#include "StdAfx.h"
#include "Global.h"
#include "Win32Project5.h"
#include "ThreeDGraph.h"
#include "ClipinData.h"
#include <windows.h>
#include <string>
#include <ios>
#define MAX_LOADSTRING 100


void CThreeDGraph::Draw3DGraph()
{
    CClipinData ClipinData;

    //CThreeDGraph Graph;

    int SetXMaxValue, SetYMaxValue;
    int SetXMinValue, SetYMinValue;

    string TodaysDate;
    string ClipinID = ClipinData.InstallationID;

    int red = rand() % 256;
    int green = rand() % 256;
    int blue = rand() % 256;

    HPEN CustomColourPen = CreatePen(PS_INSIDEFRAME, 1, RGB(red, green, blue));
    HPEN BlackPen = CreatePen(PS_INSIDEFRAME, 1, RGB(0, 0, 0));

    for (int Day = 0; Day < ClipinData.TotalNumberOfDaysOfData; Day++)
    {
        TodaysDate = ClipinData.ClipinDataSet[Day].DateOfStartOfData.FormatDateOnly();

        int parameterID;
        float parameterVAL;
        int SecondsFromStartOfDay = 0;

        //HDC hdcdraw = hdc;

        int xoffset = 0;
        int yoffset = 0;

        SetXMaxValue = 864.4;
        SetXMinValue = 10;
        SetYMaxValue = 900;
        SetYMinValue = 1;

        MoveToEx(hdc, 10 + xoffset, 900 - yoffset, NULL);

        for (int ParameterCount = 0; ParameterCount < ClipinData.ClipinDataSet[Day].totalNumberEvents; ParameterCount++)
        {
            parameterID = ClipinData.ClipinDataSet[Day].EventsList[ParameterCount].parameterID;
            parameterVAL = ClipinData.ClipinDataSet[Day].EventsList[ParameterCount].parameterVAL;
            SecondsFromStartOfDay = ClipinData.ClipinDataSet[Day].EventsList[ParameterCount].TimeFromStartOfSequence;

            if (parameterID == PRIMARY_TEMP_ID)
            {
                SelectObject(hdc, CustomColourPen);
                LineTo(hdc, (SecondsFromStartOfDay + xoffset) / 90 + xoffset, 900 - parameterVAL * 10 - yoffset);
            }
        }

        SelectObject(hdc, BlackPen);
        MoveToEx(hdc, 10, 1, NULL);
        LineTo(hdc, SetXMinValue, SetXMaxValue);
        LineTo(hdc, SetXMaxValue, SetYMaxValue);

        MoveToEx(hdc, SetXMinValue, SetYMaxValue, NULL);
        LineTo(hdc, 300, 600);

        xoffset = xoffset + 10;
        yoffset = yoffset + 10;

    }

}

这是绘制图形的.cpp文件。

这是头文件Global.h，我用来制作＆＃39; hdc＆＃39;全局变量：

#ifndef SOURCE1_H_
#define SOURCE1_H_

extern HDC hdc;

#endif

声明如下Win32Project5.cpp（我知道名字错误）：

#include "stdafx.h"
#include "Win32Project5.h"
#include "Global.h"
#include "ThreeDGraph.h"
#include "GBasic2DGraph.h"
#include "ClipinData.h"
#include <string>
#include <stdlib.h>
#include <vector>
#include <fstream>
#include <iostream>
#include <windows.h>
#include <winbase.h>
#include <direct.h>
#include "Shobjidl.h"

..........................

Line1:  case WM_PAINT:
            InvalidateRect(hWnd,NULL,true) ;
                hdc = BeginPaint(hWnd, &ps);
                    // TODO: Add any drawing code here...
                     {
                        Graph.Draw3DGraph();
                    }

        EndPaint(hWnd, &ps);
break;

我得到了错误：

LNK1120 1未解析的外部
LNK2001未解析的外部符号＆＃34; struct HDC__ * hdc＆＃34; （？HDC @@ 3PAUHDC __ @@ A）

Win32Project5 F：\ Win32Project5 \ Win32Project5 \ ThreeDGraph.obj＆lt; 1

我不认为它会在Win32Project5.cpp的任何其他地方被宣布，如果你能借给我非常感谢的话，如果你需要更多信息，我会编辑。

从其他.cpp文件中访问变量（我知道怎么做但我错过了什么）

0 个答案: