system("cls")

在VC環境下有兩種辦法實現清屏:

1.#include

system("cls");

這種辦法的缺點是程式額外運行系統程式執行清屏操作,延長了程式執行時間。

2.自己寫函式,這種辦法快

這是從微軟MSDN得到的方法:

/* Standard error macro for reporting API errors */

#define PERR(bSuccess, api){if(!(bSuccess)) printf("%s:Error %d from %s \

on line %d\n", __FILE__, GetLastError(), api, __LINE__);}

void cls( HANDLE hConsole )

{

COORD coordScreen = { 0, 0 }; /* here's where we'll home the

cursor */

BOOL bSuccess;

DWORD cCharsWritten;

CONSOLE_SCREEN_BUFFER_INFO csbi; /* to get buffer info */

DWORD dwConSize; /* number of character cells in

the current buffer */

/* get the number of character cells in the current buffer */

bSuccess = GetConsoleScreenBufferInfo( hConsole, &csbi );

PERR( bSuccess, "GetConsoleScreenBufferInfo" );

dwConSize = csbi.dwSize.X * csbi.dwSize.Y;

/* fill the entire screen with blanks */

bSuccess = FillConsoleOutputCharacter( hConsole, (TCHAR) ' ',

dwConSize, coordScreen, &cCharsWritten );

PERR( bSuccess, "FillConsoleOutputCharacter" );

/* get the current text attribute */

bSuccess = GetConsoleScreenBufferInfo( hConsole, &csbi );

PERR( bSuccess, "ConsoleScreenBufferInfo" );

/* now set the buffer's attributes accordingly */

bSuccess = FillConsoleOutputAttribute( hConsole, csbi.wAttributes,

dwConSize, coordScreen, &cCharsWritten );

PERR( bSuccess, "FillConsoleOutputAttribute" );

/* put the cursor at (0, 0) */

bSuccess = SetConsoleCursorPosition( hConsole, coordScreen );

PERR( bSuccess, "SetConsoleCursorPosition" );

return;

}

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