下面程序的功能是从输入字符串中找出最长字符串，则下面程序哪行存在错误（ ） #include "stdio.h" #include "string.h" #define N 10 int main { char s[N">[81">, * t; line:1 int j; line:2 for line:3 gets ; line:4 t= *s; line:5 for line:6 if ; line:8 printf, t); line:9 }