清除图形屏幕

[c]代码库

#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>

int main ( void )
{
	/* request auto detection */
	int gdriver = DETECT, gmode, errorcode;
	int midx, midy;

	/* initialize graphics and local variables */
	initgraph ( &gdriver, &gmode, "" );

	/* read result of initialization */
	errorcode = graphresult();
	if ( errorcode != grOk )  /* an error occurred */
	{
		printf ( "Graphics error: %s\n", grapherrormsg ( errorcode ) );
		printf ( "Press any key to halt:" );
		getch();
		exit ( 1 ); /* terminate with an error code */
	}

	midx = getmaxx() / 2;
	midy = getmaxy() / 2;
	setcolor ( getmaxcolor() );

	/* for centering screen messages */
	settextjustify ( CENTER_TEXT, CENTER_TEXT );

	/* output a message to the screen */
	outtextxy ( midx, midy, "press any key to clear the screen:" );

	/* wait for a key */
	getch();

	/* clear the screen */
	cleardevice();

	/* output another message */
	outtextxy ( midx, midy, "press any key to quit:" );

	/* clean up */
	getch();
	closegraph();
	return 0;
}