c语言编程显示汉字科海无边然后通过上下箭头键实现缩放功能的程序！大佬们求助在线等
这个要看你在什么环境下,windows下直接可用SDK,以下是你要的效果的参考程序
#include <windows.h>
/* This is where all the input to the window goes to */
int mx=20;
int my=16;
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam) {
switch(Message) {
/* Upon destruction, tell the main thread to stop */
case WM_DESTROY: {
PostQuitMessage(0);
break;
}
case WM_KEYDOWN: {
if (wParam==VK_UP) {
mx+=4;
my+=4;
InvalidateRect(hwnd, NULL, 1);
SendMessage(hwnd,WM_PAINT,0,0);
SendMessage(hwnd,WM_PAINT,0,0);
} else if (wParam==VK_DOWN) {
mx-=10;
my-=10;
InvalidateRect(hwnd, NULL, 1);
SendMessage(hwnd,WM_PAINT,0,0);
SendMessage(hwnd,WM_PAINT,0,0);
}
break;
}
case WM_PAINT: {
RECT p;
HDC dc;
p.left=0;
p.top=0;
p.bottom=480;
p.right=640;
dc=GetDC(hwnd);
HFONT hFont=CreateFont(mx,my,0,0,FW_THIN,0,0,0,GB2312_CHARSET,OUT_CHARACTER_PRECIS,
CLIP_CHARACTER_PRECIS,DEFAULT_QUALITY,FF_MODERN,"宋体");
SelectObject(dc,hFont);
DrawText( dc, "科海无边", -1, &p,DT_vcENTER|DT_CENTER|DT_SINGLELINE);
ReleaseDC(hwnd,dc);
return DefWindowProc(hwnd, Message, wParam, lParam);
}
/* All other messages (a lot of them) are processed using default procedures */
default:
return DefWindowProc(hwnd, Message, wParam, lParam);
}
return 0;
}
/* The 'main' function of Win32 GUI programs: this is where execution starts */
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
WNDCLASSEX wc; /* A properties struct of our window */
HWND hwnd; /* A 'HANDLE', hence the H, or a pointer to our window */
MSG msg; /* A temporary location for all messages */
/* zero out the struct and set the stuff we want to modify */
memset(&wc,0,sizeof(wc));
wc.cbSize = sizeof(WNDCLASSEX);
wc.lpfnWndProc = WndProc; /* This is where we will send messages to */
wc.hInstance = hInstance;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
/* White, COLOR_WINDOW is just a #define for a system color, try Ctrl+Clicking it */
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszClassName = "WindowClass";
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* Load a standard icon */
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION); /* use the name "A" to use the project icon */
if(!RegisterClassEx(&wc)) {
MessageBox(NULL, "Window Registration Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
hwnd = CreateWindowEx(WS_EX_CLIENTEDGE,"WindowClass","测试",WS_VISIBLE|WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, /* x */
CW_USEDEFAULT, /* y */
640, /* width */
480, /* height */
NULL,NULL,hInstance,NULL);
if(hwnd == NULL) {
MessageBox(NULL, "Window Creation Failed!","Error!",MB_ICONEXCLAMATION|MB_OK);
return 0;
}
/*
This is the heart of our program where all input is processed and
sent to WndProc. Note that GetMessage blocks code flow until it receives something, so
this loop will not produce unreasonably high CPU usage
*/
while(GetMessage(&msg, NULL, 0, 0) > 0) { /* If no error is received... */
TranslateMessage(&msg); /* Translate key codes to chars if present */
DispatchMessage(&msg); /* Send it to WndProc */
}
return msg.wParam;
}
