Copying and printing character arrays

character_pointers_and_copy.c

#include<stdio.h>
#include<string.h>

#define FIRST "hello world"
#define SECOND "bye"


int main()
{

    char message[500];

    //strncpy(message, FIRST, 12);
    strncpy(message, FIRST, sizeof(FIRST));
    char* ptr;
    ptr = message;
    while(*ptr != '\0')
    {
        printf("%c",*ptr);
        ptr++;
    }

    printf("\n");


    strncpy(message, SECOND, sizeof(SECOND));
    ptr = message;
    while(*ptr != '\0')
    {
        printf("%c",*ptr);
        ptr++;
    }

    printf("\n");


    return 0;
}