In exercise 1-16 in The C Programming Language (K & R) it asks for us to: revise the main routine of the longest-line program so it will correctly print the length of arbitrary long input lines, and as much as possible of the text.

From what I read here, I get the notion that the main routine is everything inside of main, is this correct? I posted the code for the longest-line program below for more context, but I am confused my what I am being asked to do not the code. Thanks!

#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 )
    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] = '';    
    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] ) != '' )
        ++i;
}