Copy String Using Pointer

#include <stdio.h>
#include <stdlib.h>


char* makeCopy(char* c)
{
    int len = 0, i;
    char* p = c;
    char* copy;

    while(*p) {
        len++;
        p++;
    }

    // Don't forget to dynamically allocate memory for copy. I almost always forget it :(
    copy = (char*) malloc(sizeof(char) * (len + 1));    // len + 1, not len because we need space for null character too.

    for (i = 0; i <= len; i++)  // I have written i <= len, not i < len, because I want to copy the null character too.
        *(copy + i) = *(c + i);

    return copy;
}


int main()
{
    char message[1000] = "Hi there";
    char *copy = makeCopy(message);

    printf("original : %s\taddress: %p\n", message, message);
    printf("copy     : %s\taddress: %p\n", copy, copy);


    return 0;
}