# include<stdio.h>
# include<stdlib.h>
int main()
{
FILE *fp;
char filename[10];
printf("请输入文件名\n");
scanf("%s",filename);
if((fp=fopen(filename,""))==NULL)
{
    printf("无法打开文件\n");
    exit(0);
}
int i;
    for(i=0;i<=255;i++)
    {
        fprintf(fp,"%d",i);
        
        fprintf(fp,"%s",i);   
        fprintf(fp,"\n");
    }
    fclose(fp);
        return 0;
   
 }

 这个代码是什么问题？？有什么办法改吗？