order c program

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

int i = 0;

typedef struct
{

    char *entree[80];
    char *drink[80];
    char *dessert[80];

} order;

void print_commands()
{
    printf("e: entree\n");
    printf("d: drink\n");
    printf("t: dessert\n");
    printf("o: print complete order\n");
    printf("c: print list of commands\n");
    printf("w: write to text file\n");
    printf("x: exit\n");
}


void ask_order()
{


    char choice;
    order o;
    FILE *orderfile = NULL;
    orderfile = fopen("order.txt", "w");

    printf("Welcome\nWhat Would you like to order?:\n");
    printf("Commands:\n\n");
    print_commands();
    while (i == 0)
    {
        printf("\nENTER_OPTION>");
        scanf("%c", &choice);
        switch (choice)
        {

        case 'e':

            printf("Enter your entree: ");
            scanf("%s", o.entree);
            break;

        case 'd':
            printf("Enter your drink: ");
            scanf("%s", o.drink);
            break;

        case 't':
            printf("Enter a dessert: ");
            scanf("%s", o.dessert);
            break;

        case 'o':
            printf("Entree: %s\n", o.entree);
            printf("Drink: %s\n", o.drink);
            printf("Dessert: %s\n", o.dessert);
            break;

        case 'c':
            print_commands();
            break;

        case 'w':
            printf("Saving to File...\n");
            /* This isnt Working, it segfaults... */
            fprintf(orderfile, "Entree: %s\nDrink: %s\nDessert: %s\n",
                    o.entree, o.drink, o.dessert);
            fclose(orderfile);
            break;

        case 'x':

            i += 1;
            break;


        }
    }
}


int main()
{
    ask_order();
    return 0;
}