c语言在cmd中运行不了,为什么我在windows和Console下都不能运行

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#include

#include LRESULT CALLBACK Winsgjt(

HWND hwnd, // handle to window

UINT uMsg, // message identifier

WPARAM wParam, // first message parameter

LPARAM lParam // second message parameter

); int WINAPI Winmain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nShowCmd)

{

WNDCLASS sgjt;

sgjt.cbClsExtra=0; //??

sgjt.cbWndExtra=0; //??

sgjt.hbrBackground=(HBRUSH)GetStockObject(ANSI_FIXED_FONT);;

sgjt.hCursor=LoadCursor(NULL,IDC_CROSS);

sgjt.hIcon=LoadIcon(NULL,IDI_ASTERISK);

sgjt.hInstance=hInstance;

sgjt.lpfnWndProc=Winsgjt; //??

sgjt.lpszClassName="sgjt";

sgjt.lpszMenuName=NULL;

sgjt.style=CS_HREDRAW|CS_VREDRAW;

RegisterClass(&sgjt);

HWND hwnd;

hwnd=CreateWindow("sgjt","我的第一次尝试",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,WS_VISIBLE,400,400,NULL,NULL,hInstance,NULL); //最后一个NULL什么意思

ShowWindow(hwnd,SW_SHOWNORMAL);

UpdateWindow(hwnd); //??

MSG msg;

while(GetMessage(&msg,NULL,0,0)) //得到WM_QUIT时返回0值,我要得到所有窗口的信息时设为NULL

{

TranslateMessage(&msg);

DispatchMessage(&msg);

} //GetMessage的运行原理

return 0;

}

LRESULT CALLBACK Winsgjt(

HWND hwnd, // handle to window

UINT uMsg, // message identifier

WPARAM wParam, // first message parameter

LPARAM lParam // second message parameter

) //??

{

switch(uMsg)

{

case WM_CHAR:

char cha[20];

sprintf(cha,"char is %d",wParam);

MessageBox(hwnd,cha,"sgjt",MB_YESNO);

break;

case WM_LBUTTONDOWN:

MessageBox(hwnd,"sgjt","sgjt",MB_OK);

HDC hdc; //不能在WM_PAINT用

hdc=GetDC(hwnd);

TextOut(hdc,0,50,"sgjt",strlen("sgjt"));

ReleaseDC(hwnd,hdc);

break;

case WM_PAINT:

HDC hDc;

PAINTSTRUCT ps;

hDc=BeginPaint(hwnd,&ps);

TextOut(hDc,0,0,"我的第一次尝试",strlen("我的第一次尝试"));

EndPaint(hwnd,&ps);

break;

case WM_CLOSE:

if(IDYES==MessageBox(hwnd,"是否真的结束","sgjt",MB_YESNO))

{

DestroyWindow(hwnd);

}

break;

case WM_DESTROY:

PostQuitMessage(0);

break;

default:

return DefWindowProc(hwnd,uMsg,wParam,lParam);

}

return 0; }

LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16

Debug/First.exe : fatal error LNK1120: 1 unresolved externals

Error executing link.exe.

LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main

Debug/First.exe : fatal error LNK1120: 1 unresolved externals

Error executing link.exe.