确定图形驱动程序和模式

[c]代码库

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

/* names of the various cards supported */
char *dname[] = { "requests detection",
                  "a CGA",
                  "an MCGA",
                  "an EGA",
                  "a 64K EGA",
                  "a monochrome EGA",
                  "an IBM 8514",
                  "a Hercules monochrome",
                  "an AT&T 6300 PC",
                  "a VGA",
                  "an IBM 3270 PC"
                };

int main ( void )
{
	/* returns detected hardware info. */
	int gdriver, gmode, errorcode;

	/* detect graphics hardware available */
	detectgraph ( &gdriver, &gmode );

	/* read result of detectgraph call */
	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 */
	}

	/* display the information detected */
	clrscr();
	printf ( "You have %s video display \
   card.\n", dname[gdriver] );
	printf ( "Press any key to halt:" );
	getch();
	return 0;
}