通用DOS中断接口

[c]代码库

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

/* deletes file name; returns 0 on success, nonzero on failure */ 
int delete_file(char far *filename) 
{ 
   union REGS regs; struct SREGS sregs; 
   int ret; 
   regs.h.ah = 0x41;                      /* delete file */ 
   regs.x.dx = FP_OFF(filename); 
   sregs.ds = FP_SEG(filename); 
   ret = intdosx(&regs, &regs, &sregs); 

   /* if carry flag is set, there was an error */ 
   return(regs.x.cflag ? ret : 0); 
} 

int main(void) 
{ 
   int err; 
   err = delete_file("NOTEXIST.$$$"); 
   if (!err) 
      printf("Able to delete NOTEXIST.$$$\n"); 
   else 
      printf("Not Able to delete NOTEXIST.$$$\n"); 
   return 0; 
}