beginthread

#include

函數創建一個線程。

uintptr_t _beginthread(

void( *start_address )( void * ),

unsigned stack_size,

void *arglist

);

返回值：

假如成功，函數將會返回一個新線程的句柄，用戶可以像這樣聲明一個句柄變數存儲返回值：

HANDLE hStdOut = _beginthread( CheckKey, 0, NULL )。如果失敗_beginthread將返回-1。

start_address

新線程的起始地址，指向新線程調用的函數的起始地址

stack_size

新線程的堆棧大小，可以為0

arglist

傳遞給線程的參數列表，無參數時為NULL

所在庫文件：

#include

// crt_BEGTHRD.C

// compile with: /MT /D "_X86_" /c

// processor: x86

#include

#include

#include

#include

#include <conio.h>

void Bounce( void *ch );

void CheckKey( void *dummy );

#define GetRandom( min, max ) ((rand() % (int)(((max) + 1) - (min))) + (min))

BOOL repeat = TRUE;

HANDLE hStdOut;

CONSOLE_SCREEN_BUFFER_INFO csbi;

int main()

{

CHAR ch = 'A';

hStdOut = GetStdHandle( STD_OUTPUT_HANDLE );

GetConsoleScreenBufferInfo( hStdOut, &csbi );

_beginthread( CheckKey, 0, NULL );

while( repeat )

{

_beginthread( Bounce, 0, (void *) (ch++) );

Sleep( 1000L );

}

}

void CheckKey( void *dummy )

{

_getch();

repeat = 0;

}

void Bounce( void *ch )

{

char blankcell = 0x20;

char blockcell = (char) ch;

BOOL first = TRUE;

COORD oldcoord, newcoord;

DWORD result;

srand( _threadid );

newcoord.X = GetRandom( 0, csbi.dwSize.X - 1 );

newcoord.Y = GetRandom( 0, csbi.dwSize.Y - 1 );

while( repeat )

{

Sleep( 100L );

if( first )

first = FALSE;

else

WriteConsoleOutputCharacter( hStdOut, &blankcell, 1, oldcoord, &result );

WriteConsoleOutputCharacter( hStdOut, &blockcell, 1, newcoord, &result );

oldcoord.X = newcoord.X;

oldcoord.Y = newcoord.Y;

newcoord.X += GetRandom( -1, 1 );

newcoord.Y += GetRandom( -1, 1 );

if( newcoord.X < 0 )

newcoord.X = 1;

else if( newcoord.X == csbi.dwSize.X )

newcoord.X = csbi.dwSize.X - 2;

else if( newcoord.Y < 0 )

newcoord.Y = 1;

else if( newcoord.Y == csbi.dwSize.Y )

newcoord.Y = csbi.dwSize.Y - 2;

else

continue;

Beep( ((char) ch - 'A') * 100, 175 );

}

_endthread();

}