很简单一个功能，删除当前文件

#include<dos.h>
#include<stdio.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?reg:0);
}
int main()
{
    char filename[80];
    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 filr not exist\n");
    getch();
    return 0;
}