Vowel Count Switch statement

Q : using a switch statement, write a function to count the number of vowels and number of blanks
in a character array passed to it as an argument.

Solution 

#include<stdio.h>

#define MAX 20

void count(char*);

void main()

{

     char ch[MAX];

     printf("\n\tEnter String>> ");

     gets(ch);

     count(ch);

}

void count(char *str)

{

     int i,vowel=0,blank=0;

     for(i=0;str[i]!='\0';i++)

     {

           switch(str[i])

           {

                case 'a':

                case 'A':

                case 'e':

                case 'E':

                case 'i':

                case 'I':

                case 'o':

                case 'O':

                case 'u':

                case 'U':

                      vowel++;

                      break;

                case ' ':

                      blank++;

                      break;

           }

     }

     printf("\n\tVowel=%d\n\tBlank=%d",vowel,blank);

}

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