Thread: A very silly question on character arrays but I will ask it.

This code is a direct paste from K&R:

Code:

#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*/
main()
{
int len;

int max;

char line[MAXLINE];  /* current line length */
char longest[MAXLINE]; /*maximum length seen so far */

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;
}

My doubt is, how

Code:

copy(char to[], char from[])

is getting string input? AFAIK getchar() reads the next input character and assigns it to s[i].

Or in other words I would like to understand assignment of character array between two functions (i.e. getline & copy). This may be the silliest of question ever asked on this forum but am really confused here!