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Turbo C 2.0、Borland C++库函数及用例(41) #include <stdio.h>int main(void)
{
char far *dta;
dta = getdta();
printf("The current disk transfer \
address is: %Fp\n", dta);
return 0;
}
函数名: getenv
功 能: 从环境中取字符串
用 法: char *getenv(char *envvar);
程序例:#include <stdlib.h>
#include <stdio.h>int main(void)
{
char *s; s=getenv("COMSPEC"); /* get the comspec environment parameter */
printf("Command processor: %s\n",s);
/* display comspec parameter */ return 0;
}
函数名: getfat, getfatd
功 能: 取文件分配表信息
用 法: void getfat(int drive, struct fatinfo *fatblkp);
程序例:#include <stdio.h>
#include <dos.h>int main(void)
{
struct fatinfo diskinfo;
int flag = 0; printf("Please insert disk in drive A\n");
getchar(); getfat(1, &diskinfo);
/* get drive information */ printf("\nDrive A: is ");
switch((unsigned char) diskinfo.fi_fatid)
{
case 0xFD:
printf("360K low density\n");
break; case 0xF9:
printf("1.2 Meg high density\n");
break; default:
printf("unformatted\n");
flag = 1;
} if (!flag)
{
printf(" sectors per cluster %5d\n",
diskinfo.fi_sclus);
printf(" number of clusters %5d\n",
diskinfo.fi_nclus);
printf(" bytes per sector %5d\n",
diskinfo.fi_bysec);
} return 0;
}
函数名: getfillpattern
功 能: 将用户定义的填充模式拷贝到内存中
用 法: void far getfillpattern(char far *upattern);
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; int maxx, maxy;
char pattern[8] =
{ 0x00, 0x70, 0x20, 0x27, 0x25, 0x27, 0x04, 0x04 }; /* 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();
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