Thread: Pointer Problems

I am trying to implement bubble sort for a class assignment. They are trying to teach us how to use pointers. The only problem is it is an online course and I don't quite get the pointer thing. I'm having trouble with the swap function and getting it the right pointer level to be passed. Please help!

Code:

#include <stdio.h>
#include <string.h>
#define SIZE 10

void bubbleSort(char * const array[], const int size);

int main()
{
        char *a[SIZE] = {"Mahmuda", "Tim", "Andrew", "Jacob", "Vasant", "Kenneth", "Kendall", "John", "Vijayakumar", "Marion"};

        int i;

        printf("Data items in original order\n");

        //loop through array a
        for(i = 0; i < SIZE; i++)
        {
                printf("%s ", *(a + i));
        }

        printf("\nData items in ascending order\n");

        bubbleSort(a, SIZE);

        for(i = 0; i < SIZE; i++)
        {
                printf("%s ", *(a + i));
        }
        printf("\n");
        return 0;
}

void bubbleSort(char * const array[], const int size)
{
        void swap(char **ptrElement1, char **ptrElement2);
        int stringGreaterThan(char string1[], char string2[]);
        int pass;
        int j;

        for(pass = 0; pass < size - 1; pass++)
        {
                for(j = 0; j < size - 1; j++)
                {

                        if(strcmp(*(array + j), *(array + j + 1)) > 0)
                        {
                                swap(*(array + j), *(array + j + 1));
                        }
                }
        }
}

void swap(char **ptrElement1, char **ptrElement2)
{
      int hold = *ptrElement1;
      *ptrElement1 = *ptrElement2;
      *ptrElement2 = hold;
}