#include <stdio.h>

main()

{

FILE *fp;long num=0;

if((fp=fopen("abc.dat",___"r"___))==NULL)

{ printf("Open error\n"); exit(0);}

while(___!feof(fp))

{___???___;num++}

printf("num=%ld\n",num);

fclose(fp);

}

第三个空填什么哈？望指教~~谢了~

oh……thanks a lot