c++ 输出一个圆形

//VC6.0编译通过

#include<iostream>
#include<windows.h>
#include<conio.h>
using namespace std;

int main(int argc, char* argv[])
{
char arg[200]={0};
arg[0]='\"';
strcpy(arg+1, argv[0]);
int len=int(strlen(arg));
arg[len]='\"';
HWND hWnd=FindWindow(NULL, arg); //找到程序运行窗口的句柄
HDC hDC=GetDC(hWnd);//通过窗口句柄得到该窗口的设备场境句柄
HPEN hPen, hOldPen; //画笔

hPen=CreatePen(PS_SOLID, 2, 0x00ff00);//生成绿色画笔
hOldPen=(HPEN)SelectObject(hDC, hPen);//把画笔引入设备场境
Arc(hDC, 100, 100, 300, 300, 350, 500, 350, 500);//画圆
SelectObject(hDC, hOldPen);
cout<<"画圆形："<<endl;
getch();

return 0;
}

#include "Stdio.h"
#include "Conio.h"

# include "graphics.h"
# include "math.h"
# define PI 3.1415926

void digui(int x,int y,int r)