characterarrays.cpp

#include <stdio.h>
#define MAXLINE 1000

/* copy input to output; 2nd */
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("%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;
}