#include<stdio.h>
#include<stdlib.h>
#define N 256
int main(){
char buff[N],file[20];
int lcnt;
FILE *fp; //文件型指针
puts("Input a flie name:\n");
scanf("%s",file);
if((fp=fopen(file,"r"))==NULL){ //以只读方式打开指定文件
printf("\nFile %s fail.",file);
exit(1); //读取失败退出运行
}
lcnt=0;
while(fgets(buff,N,fp)!=NULL){ //读取fp指向文件的字符串存放于buff
printf("%3d:%s",++lcnt,buff);
}
fclose(fp);
}
