例题5-1 在扇面上输出一首唐诗

#include"windows.h"
#include"tchar.h"
#include"math.h"
//#include "example5_1.h"

#define PI 3.1415926

BOOLEAN InitWindowClass(HINSTANCE hInstance, int nCmdShow);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
HFONT CreateMyFont(TCHAR* FontName, int height, int lean);//创建自定义字体
//三个参数分别是字体名称、字体大小、字体的倾斜度。倾斜度以/10为一个逻辑单位
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	MSG msg;
	if (!InitWindowClass(hInstance, nCmdShow))
	{
		MessageBox(NULL, L"创建窗口失败!", _T("创建窗口"), NULL);
		return 1;
	}
	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return(int)msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	HDC hDC;
	PAINTSTRUCT ps;
	HFONT font;
	HPEN hPen;
	LPWSTR title = L"登高唐.杜甫", poem[8] = { L"风急天高猿啸哀",L"渚清沙白鸟飞回",L"无边落木萧萧下",L"不尽长江滚滚来",
		L"万里悲秋常作客",L"百年多病独登台",L"艰难苦恨繁霜鬓",L"潦倒新停浊酒杯" };
	int r, r0, i, j = -1, fontSize, fontSize0, color;
	RECT clientDimension;  //存放客户区的尺寸
	POINT begin, end, org;   //保存点的信息，org表示圆心坐标
	double sita;
	switch (message)
	{
	case WM_SIZE:
		InvalidateRect(hWnd, NULL, true);
		break;
	case WM_PAINT:
		hDC = BeginPaint(hWnd, &ps);
		hPen = CreatePen(PS_DASH, 1, RGB(127, 127, 127));//设置画笔为系统预定义的黑色画笔
		SelectObject(hDC, hPen);  //选择画笔
		GetClientRect(hWnd, &clientDimension);//获取客户区的尺寸
		if ((clientDimension.right - clientDimension.left) < 400 || (clientDimension.bottom - clientDimension.top) < 300)
		{
			MessageBox(hWnd, L"屏幕尺寸太小，无法绘图!", L"错误信息", 0);
			break;
		}
		r = (clientDimension.bottom - clientDimension.top) * 8 / 10;  //用屏幕高度的/5作为扇形的半径
		org.x = (clientDimension.right - clientDimension.left) / 2;
		org.y = (clientDimension.bottom - clientDimension.top) * 9 / 10;
		Arc(hDC, org.x - r, org.y - r, org.x + r, org.y + r, org.x + (int)(r + sin(PI / 3)), org.y - (int)(r * cos(PI / 3)),
			org.x - (int)(r * sin(2 * PI / 3)), org.y + (int)(r * cos(2 * PI / 3)));  //画外围圆弧
		for (sita = PI / 6;sita <= PI * 5 / 6;sita += PI * 2 / 27)
		{
			begin.x = org.x - (int)(r * cos(sita));
			begin.y = org.y - (int)(r * sin(sita));
			MoveToEx(hDC, begin.x, begin.y, NULL);
			end.x = org.x;
			end.y = org.y;
			LineTo(hDC, end.x, end.y);
		}     //画折线
		r0 = r * 2 / 5;
		Arc(hDC, org.x - r0, org.y - r0, org.x + r0, org.y + r0, org.x + (int)(r0 + sin(PI / 3)), org.y - (int)(r0 * cos(PI / 3)),
			org.x - (int)(r0 * sin(2 * PI / 3)), org.y + (int)(r0 * cos(2 * PI / 3)));  //画内侧圆弧
		sita = PI / 6 + PI * 4 / 15 / 5;
		fontSize0 = fontSize = (r - r0) / 7;
		r0 = r - 20;
		for (i = 0;i < 7;i++)
		{
			LPCWSTR outInfo = &title[i];//逐步取诗的标题字
			fontSize -= 3;
			font = CreateMyFont(L"楷体_GB2312", fontSize - 5, -(sita + PI / 15) * 1800 / PI); //创建字体
			SelectObject(hDC, font);//将创建的字体句柄选入设备环境
			begin.x = org.x + (int)(r0 * cos(sita));
			begin.y = org.y - (int)(r0 * sin(sita));  //计算输出文字的坐标
			TextOut(hDC, begin.x, begin.y, outInfo, 1);//输出文字
			r0 -= fontSize;//文字位置由外向内移动
			DeleteObject(font);
		}
		for (sita = PI / 6 + PI * 4 / 27 - PI / 40;sita < PI * 5 / 6;sita += PI * 2 / 27)
		{
			fontSize = fontSize0;
			r0 = r - 20;
			j++;
			color = 0;
			for (i = 0;i < 7;i++)
			{
				color += 255 / 7;
				SetTextColor(hDC, RGB(255 - color, 0, color));
				LPCWSTR outInfo = &poem[j][i];
				fontSize -= 3;
				font = CreateMyFont(L"华文行楷", fontSize, (int)(((sita - PI / 2) * 1800 / PI)) % 3600);
				SelectObject(hDC, font);
				begin.x = org.x + (int)(r0 * cos(sita));
				begin.y = org.y - (int)(r0 * sin(sita));
				TextOut(hDC, begin.x, begin.y, outInfo, 1);
				r0 -= fontSize;
				DeleteObject(font);
				Sleep(10);//输出一个文字暂停1秒
			}
		}
		EndPaint(hWnd, &ps);//结束绘图
		break;
	case WM_DESTROY:
		PostQuitMessage(0);//调用PostQuitMessage发出WM_QUIT消息
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);  //默认时采用系统消息默认处理函数
		break;
	}
	return 0;
}
HFONT CreateMyFont(TCHAR* fontName, int height, int lean)
{
	return CreateFont(   //创建自定义字体
		height,           //字体高度
		0,                //由系统根据高宽比选取字体最佳宽度值
		lean,             //文本的倾斜度为0，表示水平
		0,                  //字体的倾斜度为0
		FW_HEAVY,           //字体的粗度
		0,                   //非斜字体
		0,                     //无下划线
		0,                   //无删除线
		GB2312_CHARSET,     //表示所用的字符集为ANSI_CHARSET
		OUT_DEFAULT_PRECIS,   //输出精度为默认精度
		CLIP_DEFAULT_PRECIS,  //剪裁精度为默认值
		DEFAULT_QUALITY,       //输出质量为默认值
		DEFAULT_PITCH | FF_DONTCARE,  //字间距和字体系列使用默认值
		fontName                    //字体名称
	);
}


BOOLEAN InitWindowClass(HINSTANCE hInstance, int nCmdShow)
{
	WNDCLASSEX wcex;
	HWND hWnd;
	TCHAR szWindowClass[] = L"窗口示例";
	TCHAR szTitle[] = L"字体位置及位置示例";
	wcex.cbSize = sizeof(WNDCLASSEX);
	wcex.style = 0;
	wcex.lpfnWndProc = WndProc;
	wcex.cbClsExtra = 0;
	wcex.cbWndExtra = 0;
	wcex.hInstance = hInstance;
	wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
	wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wcex.lpszMenuName = NULL;
	wcex.lpszClassName = szWindowClass;
	wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_APPLICATION));
	if (!RegisterClassEx(&wcex))
		return FALSE;
	hWnd = CreateWindow(
		szWindowClass,
		szTitle,
		WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		CW_USEDEFAULT,
		NULL,
		NULL,
		hInstance,
		NULL
	);
	if (!hWnd)
		return FALSE;
	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);
	return TRUE;
}

 遇到的问题如下：

 具体解决方式：

在项目中找到属性，然后按照顺序，将符合模式改为“否”。

 

 结果如下：