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

#define MAX_WORDS 5

void init(char **foo);
void print(char *name, char **foo);
void printMatrix(char **arr);  /* causes compiler warning! */


int main(int argc, char *argv[])
{
    char *wordArray[MAX_WORDS];  /* compile-time array of char* */
    char **wordArray2;  /* pointer to char* */
    char matrix[MAX_WORDS][30];

    wordArray2 = (char**)malloc(MAX_WORDS * sizeof(char*));
    /* wordArray2 is now a MAX_WORDS-size array of char*'s */
    /* is there any difference between wordArray and wordArray2? */

    strcpy(matrix[0],"Jane");
    strcpy(matrix[1],"Peter");    

    wordArray[0] = "Professor";
    wordArray[1] = "Nael";

    wordArray2[0] = wordArray[1];
    wordArray2[1] = wordArray[0];

    printMatrix(wordArray);
    print("wordArray", wordArray);
    print("wordArray2", wordArray2);
    printMatrix(matrix);
    
    return 0;
}

void init(char **foo)
{
    int i;
    
    for (i = 0; i < MAX_WORDS; i++)
	foo[i] = NULL;
}

void print(char *name, char **foo)
{
    int i;
    
    printf("printing %s\n", name);
    for (i = 0; i < MAX_WORDS; i++)
	printf("%2d %s\n", i, foo[i]);
    printf("\n");
}

void printMatrix(char **arr)  /* causes compiler warning! */
/* what's wrong with the parameter type??? */
{
    int i;
    
    for (i = 0; i < MAX_WORDS; i++)
	printf("%d\t%s\n", i, arr[i]);
    printf("\n");
}