一个windows程序，对字符编码不熟悉，求指教
程序代码：#include<windows.h>
#include<tchar.h>
LRESULT CALLBACK WndProc(HWND hWnd , UINT msg , WPARAM wParam , LPARAM lParam); //声明回调函数;
const TCHAR szWindowClass[] = _T("第一个窗口");
const TCHAR szWindowTitle[] = _T("主窗口标题");
int WINAPI _tWinMain (HINSTANCE hInstance , HINSTANCE hPreInstance , LPTSTR lpCmdLine , int nCmdShow)
{
WNDCLASSEX wc = {0}; //初始化;
wc.cbSize = sizeof(wc);
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC)WndProc;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL , IDI_APPLICATION); //使用系统默认的图标;
wc.hCursor = LoadCursor(NULL , IDC_ARROW); //使用系统默认的光标;
wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); //白色画刷;
wc.lpszClassName = szWindowClass;
RegisterClassEx(&wc); //注册窗口;
HWND hWnd = CreateWindow(szWindowClass , szWindowTitle , WS_OVERLAPPEDWINDOW , 100 , 200 , 500 , 500 , HWND_DESKTOP , NULL , hInstance , NULL);
if(!hWnd) return FALSE; //如果窗口创建失败则退出;
//显示并更新窗口
ShowWindow(hWnd , nCmdShow); //nCmdShow是显示方式;
UpdateWindow(hWnd);
MSG msg;
while(GetMessage(&msg , NULL , 0 , 0))
{
TranslateMessage(&msg); //转换消息;
DispatchMessage(&msg); //将消息发送到窗口函数;
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hWnd , UINT msg , WPARAM wParam , LPARAM lParam)
{
static wstring str; //这里出错了，求解决;
switch(msg)
{
case WM_CHAR:
{
switch(wParam) //虚拟键码;
{
case 8: //处理backspace
if(str.size() == 0) return 0; //如果字符串为空，则直接返回;
str.erase(str.size() - 1 , 1); //删除string的最后一个字符;
break;
default :
str + = TCHAR(wParam);
}
InvalidateRect(hWnd , NULL , TRUE); //刷新窗口;NULL代表刷新整个区域;
return 0;
}
case WM_DESTROY : //销毁窗口;
PostQuitMessage(0);
return 0;
case WM_PAINT:
{
//TCHAR *str = _T("Hello World!");
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd , &ps); //把ps中的无效区域清空;
RECT r;
GetClientRect(hWnd , &r); //获取客户端的矩形框
SetTextColor(hdc , RGB(255 , 0 , 0));
//hdc是图形设备上下文，str是要输出的字符串,-1代表输出整个字符串,&r代表输出的矩形区域,
DrawText(hdc , str.c_str() , -1 , &r , DT_WORDBREAK | DT_LEFT | DT_TOP);
EndPaint(hWnd , &ps);
return 0;
}
default :
return DefWindowProc(hWnd , msg , wParam , lParam); //系统处理这些消息
}
}错误信息:
程序代码：1>e:\程序设计\win32project1\win32project1\源.cpp(39): error C2146: 语法错误: 缺少“;”(在标识符“str”的前面) 1>e:\程序设计\win32project1\win32project1\源.cpp(39): error C4430: 缺少类型说明符 - 假定为 int。注意: C++ 不支持默认 int 1>e:\程序设计\win32project1\win32project1\源.cpp(39): error C2065: “str”: 未声明的标识符 1>e:\程序设计\win32project1\win32project1\源.cpp(47): error C2065: “str”: 未声明的标识符 1>e:\程序设计\win32project1\win32project1\源.cpp(47): error C2228: “.size”的左边必须有类/结构/联合 1> 类型是“'unknown-type'” 1>e:\程序设计\win32project1\win32project1\源.cpp(48): error C2065: “str”: 未声明的标识符 1>e:\程序设计\win32project1\win32project1\源.cpp(48): error C2228: “.erase”的左边必须有类/结构/联合 1> 类型是“'unknown-type'” 1>e:\程序设计\win32project1\win32project1\源.cpp(48): error C2228: “.size”的左边必须有类/结构/联合 1> 类型是“'unknown-type'” 1>e:\程序设计\win32project1\win32project1\源.cpp(51): error C2065: “str”: 未声明的标识符 1>e:\程序设计\win32project1\win32project1\源.cpp(68): error C2065: “str”: 未声明的标识符 1>e:\程序设计\win32project1\win32project1\源.cpp(68): error C2228: “.c_str”的左边必须有类/结构/联合 1> 类型是“'unknown-type'”
求指教一下我该如何修改，实在不知该怎么做了！谢谢了
[ 本帖最后由 笑傲 于 2013-6-23 18:16 编辑 ]
