installuserdriver

编辑:离愁网互动百科 时间:2019-11-22 16:46:24
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中文名
installuserdriver
功  能
: 安装设备驱动程序到BG
用  法
: int far installuserdriver
对    象
#include <graphics.h>

目录

installuserdriver函数名

编辑
installuserdriver

installuserdriver功能

编辑
安装设备驱动程序到BGI设备驱动程序表中

installuserdriver简介

编辑
用 法: int far installuserdriver(char far *name, int (*detect)(void));
程序例:
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>
/* function prototypes */
int huge detectEGA(void);
void checkerrors(void);
int main(void)
{
int gdriver, gmode;
/* install a user written device driver */
gdriver = installuserdriver("EGA", detectEGA);
/* must force use of detection routine */
gdriver = DETECT;
/* check for any installation errors */
checkerrors();
/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, "");
/* check for any initialization errors */
checkerrors();
/* draw a line */
line(0, 0, getmaxx(), getmaxy());
/* clean up */
getch();
closegraph();
return 0;
}
/* detects EGA or VGA cards */
int huge detectEGA(void)
{
int driver, mode, sugmode = 0;
detectgraph(&driver, &mode);
if ((driver == EGA) || (driver == VGA))
/* return suggested video mode number */
return sugmode;
else
/* return an error code */
return grError;
}
/* check for and report any graphics errors */
void checkerrors(void)
{
int errorcode;
/* read result of last graphics operation */
errorcode = graphresult();
if (errorcode != grOk)
{
printf("Graphics error: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1);
}
}
词条标签:
计算机学