2-3.c

本书是单片机系列教材

/*2-3.C*/
#include <stdio.h>
#include <dos.h>
int delete_file(char near *filename)
{
 union REGS regs;
 int ret;
 regs.h.ah=0x41;
 regs.x.dx=(unsigned)filename;
 ret=intdos(&regs,&regs);
 return(regs.x.cflag?ret:0);
}
int main(void)
{
char near *filename;
int err;
printf("Enter filename:");
gets(filename);
err=delete_file(filename);
if(!err)
 printf("Able to delete",filename);
else 
printf("NOT able to delete,this file not exist\n");
return 0;
}