Vowels or not

To find a user input character is vowel or not {using switch case:} 

#include<stdio.h>
#include<conio.h>
void main()
{
    int n;
    clrscr();
    printf("enter character = ");
    scanf("%c",&n);
    switch (n)
    {
    case 'a':
    case 'A':
    case 'e':
    case 'E':
    case 'i':
    case 'I':
    case 'o':
    case 'O':
    case 'u':
    case 'U':
        printf("it is vowel ");
        break;
    default :
        printf("it is not a vowel");
    }
    getch();
}

OUTPUT :

enter character =a 

it is vowel

enter character = l

it is not a vowel