#include <stdio.h>
#define MAXLINE 1000   /* maximum input line length */

int getline(char line[], int maxline);
void copy(char to[], char from[]);

/* print the longest input line */
main()
{
   int len;            /* current line length */
   int max;            /* maximum length seen so far */
   char line[MAXLINE];    /* current input line */
   char longest[MAXLINE]; /* longest line saved here */

   max = 0;
   while ((len = getline(line, MAXLINE)) > 0)
       if (len > max) {
           max = len;
           copy(longest, line);
       }
   if (max > 0)  /* there was a line */
       printf("%s", longest);
   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)
       s[i] = c;
   if (c == '\n') {
       s[i] = c;
       ++i;
   }
   s[i] = '\0';
   return i;
}

/* copy:  copy 'from' into 'to'; assume to is big enough */
void copy(char to[], char from[])
{
   int i;

   i = 0;
   while ((to[i] = from[i]) != '\0')
       ++i;
}


/*
Discuss:

- character arrays (most common use of arrays)
- pseudocode
    while (there's another line)
        if (it's longer than previous longest)
            save it
            save its length
    print longest line

- getline() - fetch next line of input,
  copy() - to copy new line to save it

- strings and null character '\0' terminator


Exercise 1-16, 1-18

*/