Write a C function that takes an array of pointers to strings and sorts them in lexicographic (dictionary) order.

Sorting Pointers to Strings in Lexicographic Order using a C Function

in this program you can use the qsort function from the C standard library to sort the array of pointers to strings. Here's an example C function that does this:

#include 
#include 
#include 

int compareStrings(const void *a, const void *b) {
    return strcmp(*(const char **)a, *(const char **)b);
}

void sortStrings(char *arr[], int size) {
    qsort(arr, size, sizeof(char *), compareStrings);
}

int main() {
    char *strings[] = {"banana", "apple", "cherry", "date"};

    int numStrings = sizeof(strings) / sizeof(strings[0]);

    sortStrings(strings, numStrings);

    for (int i = 0; i < numStrings; i++) {
        printf("%s\n", strings[i]);
    }

    return 0;
}

Explanation:

1. compareStrings is a comparison function that will be used by qsort to compare two strings. It uses strcmp to perform lexicographic comparison.
2. sortStrings is the function that takes an array of pointers to strings and sorts them using qsort. It uses compareStrings as the comparison function.
3. In the main function, an array of strings is defined. The number of strings is calculated using sizeof.
4. sortStrings is called to sort the array of strings.
5. The sorted strings are then printed out.

When you run this program, you'll get the following output:

bash
apple
banana
cherry
date