/****************************************************************************
 * copy2.c
 *
 * Computer Science 50
 * David J. Malan
 *
 * Copies a string.
 *
 * Demonstrates strings as pointers to arrays.
 ***************************************************************************/
       
#include <cs50.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>


int
main(int argc, char *argv[])
{
    // get line of text
    printf("Say something: ");
    char *s1 = GetString();
    if (s1 == NULL)
        return 1;
 
    // allocate enough space for copy
    char *s2 = malloc((strlen(s1) + 1) * sizeof(char));
    if (s2 == NULL)
        return 1;

    // copy string
    int n = strlen(s1);
    for (int i = 0; i < n; i++)
        s2[i] = s1[i];
    s2[n] = '\0';

    // change copy
    printf("Capitalizing copy...\n");
    if (strlen(s2) > 0)
        s2[0] = toupper(s2[0]);

    // print original and copy
    printf("Original: %s\n", s1);
    printf("Copy:     %s\n", s2);

    // free memory
    free(s1);
    free(s2);
}