Compiler warnings from K&R program - c

Question

I believe I copied this code verbatim from the book. It works, but generates three warnings:
C4047: 'function' : 'char' differs in levels of indirection from 'char [1000]'
C4024: 'copy' : different types for formal and actual parameter 2
C4028: formal parameter 2 different from declaration
Here is the code. What am I doing wrong? Many thanks.
#include <stdio.h>
#define MAXLINE 1000 //max input line size
int getline(char line[], int maxline);
void copy(char to[], char from);
//print longest input line
main()
{
int len; //current line length
int max; //max 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;
}

Answer 1

The problem is that in the forward declaration on the fifth line you have this:
void copy(char to[], char from); // <<== No square brackets
and in the definition you have this:
void copy(char to[], char from[]) ...
The definition is correct; the forward declaration is not. You need to add square brackets to forward declaration to fix this problem.