How to write Menu Driven program using Switch case in C

#include<stdio.h>

#include<conio.h>

#include<Process.h>

 main()

{

            int choice,num,i;

            long int fact;

            printf("\n1.Factorial number");

            printf("\n2.Prime\n");

            printf("\n3.Odd or even\n");

            printf("\n4. Multiplication table");

            printf("\n5. Exit\n");

            printf("\nEnter your choice (1/2/3/4/5):-");

            scanf("%d",&choice);

            switch(choice)

            {

                        case 1:

                                    printf("Enter number=");

                                    scanf("%d",&num);

                                    fact=1;

                                    for(i=1;i<num;i++)

                                    fact=fact*i;

                                    printf("Functional no=%|d",fact);

                                    break;

                        case 2:

                                    printf("Enter number =");

                                    scanf("%d",&num);

                                    for(i=2;i<num;i++)

                                    {

                                                if(num%i==0)

                                                {

                                                            printf("\nNot Prime");

                                                            break;

                                                }

                                    }

                                    if(i==num)

                                    printf("\n Prime number");

                                    break;

                        case 3:

                                    printf("Enter number=");

                                    scanf("%d",&num);

                                    if(num%2==0)

                                    printf("\n even number");

                                    else

                                    printf("\n odd number");

                                    break;

                        case 4:

                                    printf("Enter no=");

                                    scanf("%d",&num);

                                    for(i=1;i<=10;i++)

                                    {

                                                int mult=num*i;

                                                printf("\t%dX%d=%d\n",num,i,mult);

                                    }

                                    break;

                        case 5:

                                    exit(0);

 

                                    default:

                                                printf("You are not allowed to type other");

                                                exit(0);

            }

            getch();

}