Code

 Header...
//
// Count vowels and non-vowels
// Demonstrates the switch statement. 
//

 int main(){
   ... 

»  char hello[16]="Hello, world";
»  int i, vowels=0, nonvowels=0;

»  for (i=0; helloi; ++i) 
    switch (tolower(helloi)) {
»    case 'a':
»    case 'e':
»    case 'i':
»    case 'o':
»    case 'u':
»      ++vowels;
»      break;

»    default :
»      ++nonvowels;
}

»  printf("The phrase \"%s\" contains %d vowels out of %d characters\n", 
         hello, vowels, vowels+nonvowels);
»  return 0;
}