题目是使用MFC设计一个长方形的类CRtangle,使用对话框输入长度，宽度，在客户端输出周长面积。求详细步骤，麻烦编译下，感学MFC,怎么创建工程都不会，最好有图，呵呵
class CRectangle
{
public:
       CRectangle();
       virtual~CRectangle();
      void imput();
      double circum();
       double area();
private:
        double length;
        double width;
};


 

CRectangle::CRectangle()
{
}
CRectangle::~CRectangle()
{
}
void CRectangle::imput()
{
   CInputDlg Dlg;
   if(IDOK==Dlg.DoModal())
   {
   length=Dlg.m_len;
   width=Dlg.m_wid;

   }
}
double CRectangle::circum()
{
   return 2*(length+width);
}
double CRectangle:: area()
{
   return length*width;
}

#include "stdafx.h"

void  CTestView::OnMENURectangle()
{

   //TODO:Add Onmmand handler code here
   RedrawWindow();
   CRectangle Rect;
   Rect.imput();
   CString Str;
  CClientDC dc(this);
  dc.SetTextColor(RGB(0,0,255));
  Str.Format("长方形的周长为:%5.2f",Rect.circum());
  dc.TextOut(100,60,Str);
  Str.Format("长方形的面积为:%5.2f",Rect.area());
  dc.TextOut(100,80,Str);
}

在等啊，。。

我也看了，不过不太懂，不会啊

我编译的有错，麻烦哪位看看，
--------------------Configuration: 10 - Win32 Debug--------------------
Compiling resources...
Compiling...
StdAfx.cpp
Compiling...
10.cpp
MainFrm.cpp
10Doc.cpp
10View.cpp
Rectangle.cpp
F:\book\新建文件夹 (2)\Rectangle.cpp(32) : error C2653: 'CTestView' : is not a class or namespace name
F:\book\新建文件夹 (2)\Rectangle.cpp(36) : error C2660: 'RedrawWindow' : function does not take 0 parameters
F:\book\新建文件夹 (2)\Rectangle.cpp(37) : error C2065: 'CRectangle' : undeclared identifier
F:\book\新建文件夹 (2)\Rectangle.cpp(37) : error C2146: syntax error : missing ';' before identifier 'Rect'
F:\book\新建文件夹 (2)\Rectangle.cpp(37) : error C2065: 'Rect' : undeclared identifier
F:\book\新建文件夹 (2)\Rectangle.cpp(38) : error C2228: left of '.imput' must have class/struct/union type
F:\book\新建文件夹 (2)\Rectangle.cpp(40) : error C2673: 'OnMENURectangle' : global functions do not have 'this' pointers
F:\book\新建文件夹 (2)\Rectangle.cpp(42) : error C2228: left of '.circum' must have class/struct/union type
F:\book\新建文件夹 (2)\Rectangle.cpp(44) : error C2228: left of '.area' must have class/struct/union type
Generating Code...
执行 cl.exe 时出错.

10.exe - 1 error(s), 0 warning(s)