C语言库函数集合（大全）

函数名: parsfnm  
功  能: 分析文件名  
用  法: char *parsfnm (char *cmdline, struct fcb *fcbptr, int option);  
程序例:  

#include <process.h>  
#include <string.h>  
#include <stdio.h>  
#include <dos.h>  

int main(void)  
{  
   char line[80];  
   struct fcb blk;  

   /* get file name */  
   printf("Enter drive and file name (no path - ie. a:file.dat)\n");  
   gets(line);  

   /* put file name in fcb */  
   if (parsfnm(line, &blk, 1) == NULL)  
      printf("Error in parsfm call\n");  
   else  
      printf("Drive #%d  Name: %11s\n", blk.fcb_drive, blk.fcb_name);  

   return 0;  
}  
   
   

函数名: peek  
功  能: 检查存储单元  
用  法: int peek(int segment, unsigned offset);  
程序例:  

#include <stdio.h>  
#include <conio.h>  
#include <dos.h>  

int main(void)  
{  
   int value = 0;  

   printf("The current status of your keyboard is:\n");  
   value = peek(0x0040, 0x0017);  
   if (value & 1)  
      printf("Right shift on\n");  
   else  
      printf("Right shift off\n");  

   if (value & 2)  
      printf("Left shift on\n");  
   else  
      printf("Left shift off\n");  

   if (value & 4)  
      printf("Control key on\n");  
   else  
      printf("Control key off\n");