问编写一个程序(用C语言)打印超过10个字符的所有输入行

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#include <stdio.h>
#define MAXLINE 1000 /* maximum input line length */
#define NEED 10 //minimum lenght of a line to be printed

int main()
{
    int len;//length of last line
    char line[MAXLINE];//current line
    char lines[1000];//array with all lines
    int i;//current array zone for write
    i = 0;

    while ((len = getline(line, MAXLINE)) > 0)//get one line from user
        if (len > NEED){//if length of its is bigger than NEED
             i = copy(line, lines, i);//write character by character in lines
        }
    printf("%s", lines);//print lines

    return 0;
}

/* getline: read a line into s, return length */
int getline(char s[],int lim)
{
    int c, i;
    for (i=0; i < lim-1 && (c=getchar())!=EOF && c!='\n'; ++i)//get the line
        s[i] = c;//character by character
    s[i] = '\n';//and add new line(\n) at last of its
    return i;//return length of line
}

// copy a character array to another and return last wrote zone of array
int copy(char from[], char to[], int i)
{
    int j=0;
    while(from[j] != '\0'){
        to[i]=from[j];
        i++;
        j++;
    }
    return i;
}