Im trying to create a code that simply counts the number of vowels imputed by the user. Here's where I am.

Code:
#include <iostream>
 using namespace std;

 bool isVowel(char ch);

 int main()
 {

 int count=0;
 char character;
 int vowelcount=0;


 cout << "Enter a sentence"<< endl;
 cout << endl;


 while(character !='!')
 {
 cin >> character;
 

 if(isVowel(character)==true)
 {
 vowelcount++;
              cout << "Vowels are " << vowelcount << endl;
 }
 if(vowelcount !=0)
    {
	cout << endl;
             }
 }
 cout << endl;


 }

 bool isVowel(char ch)
 {

 if ('A' == ch || 'a' == ch ||
 'E' == ch || 'e' == ch ||
 'I' == ch || 'i' == ch ||
 'O' == ch || 'o' == ch ||
 'U' == ch || 'u' == ch)
 {


 }
 
 }