A program to check an alphabet is vowel-using-switch-case

#include<stdio.h>;
void main()
{
char alfa;

printf("Enter an Alphabet : ");
scanf("%c",&alfa);

switch( alfa ) //switching a chracter
    {
    case 'a' :
    case 'e' :
    case 'i' :
    case 'o' :
    case 'u' :
    printf("Yes Enterd Alphabet is a vowel");
    break;
    default :
    printf("No Enterd Alphabet is Not vowel");
    }
}