void display_names(char **names_to_display, char **output);

int main(void)
{
    char *names[] = {"Luke", "John", "Peter", 0};
    char **my_names = names;
    char *new_output[] = {0};
    size_t i = 0;

    while(*my_names)
    {
        printf("Name: %s\n", *my_names++);
    }

    my_names = names; /* Reset */
    display_names(my_names, new_output);

    // Stack dump here.
    while(*new_output[i])
    {
        printf("Full names: %s\n", *new_output[i]);
        i++;
    }

    getchar();

    return 0;
}

void display_names(char **names_to_display, char **output)
{
    while(*names_to_display)
    {   
        *output = malloc(strlen("FullName: ") + strlen(*names_to_display) + 1); // Allocate memory

        // Copy new output
        sprintf(*output, "FullName: %s", *names_to_display++);
        printf("display_names(): Name: %s\n", *output++);
    }   
}

while(*names_to_display)
	{	
		// Stack dump here
		*output = malloc(sizeof("FullName: ") + strlen(*names_to_display) + 1); // Allocate memory
		
		// Copy new output
		sprintf(*output, "FullName: %s", *names_to_display++);
		printf("display_names(): Name: %s\n", *output++);
	}