solutions/The C Programming Language/1.16.c

#include <stdio.h>

#define MAXLINE 10

// forcing getline to output actual amount of characters
// from input even if it exceedes MAXLINE boundary

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

main()
{
	int len;
	int max;
	char line[MAXLINE];
	char longest[MAXLINE];

	max = 0;
	while ((len = _getline(line, MAXLINE)) > 0)
		if (len > max)
		{
			max = len;
			copy(longest, line);
		}
	if (max > 0)
		printf("%d: %s\n", max, longest);

	return 0;
}

int _getline(char s[], int lim)
{
	int c, i, j;
	for (i = 0; (c = getchar()) != '\n'; ++i)
	{
		if (i < lim - 1)
			s[i] = c;
	}

	j = i;
	if (j > lim - 1)
		j = lim - 1;
	s[j] = '\0';
	return i;
}

void copy(char to[], char from[])
{
	int i;

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