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Turbo C 2.0、Borland C++库函数及用例(40) return 0;
}
函数名: getdfree
功 能: 取磁盘自由空间
用 法: void getdfree(int drive, struct dfree *dfreep);
程序例:#include <stdio.h>
#include <stdlib.h>
#include <dir.h>
#include <dos.h>int main(void)
{
struct dfree free;
long avail; int drive; drive = getdisk();
getdfree(drive+1, &free);
if (free.df_sclus == 0xFFFF)
{
printf("Error in getdfree() call\n");
exit(1);
} avail = (long) free.df_avail *
(long) free.df_bsec *
(long) free.df_sclus;
printf("Drive %c: has %ld bytes \
available\n", 'A' + drive, avail); return 0;
}
函数名: getdisk
功 能: 取当前磁盘驱动器号
用 法: int getdisk(void);
程序例:#include <stdio.h>
#include <dir.h>int main(void)
{
int disk; disk = getdisk() + 'A'; printf("The current drive is: %c\n",
disk);
return 0;
}
函数名: getdrivername
功 能: 返回指向包含当前图形驱动程序名字的字符串指针
用 法: char *getdrivename(void);
程序例:#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>int main(void)
{
/* request auto detection */
int gdriver = DETECT, gmode, errorcode;/* stores the device driver name */
char *drivername;/* initialize graphics and local variables */
initgraph(&gdriver, &gmode, "");/* read result of initialization */
errorcode = graphresult();
/* an error occurred */
if (errorcode != grOk)
{
printf("Graphics error: %s\n",
grapherrormsg(errorcode));
printf("Press any key to halt:"); getch();
/* terminate with an error code */
exit(1);
} setcolor(getmaxcolor());/* get name of the device driver in use */
drivername = getdrivername();/* for centering text on the screen */
settextjustify(CENTER_TEXT, CENTER_TEXT);/* output the name of the driver */
outtextxy(getmaxx() / 2, getmaxy() / 2,
drivername);/* clean up */
getch();
closegraph();
return 0;
}
函数名: getdta
功 能: 取磁盘传输地址
用 法: char far *getdta(void);
程序例:#include <dos.h>
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