Help for homework......isVowel function

[janice3]

write a program that prompts the user to input a sequence of characters and outputs the number of vowels. using the function isVowel.
help me for code.

bool isVowel(char ch);
int main
{
   char letter;
   int num;
   cout<<"enter a sequence of characters: ";
   cin >> letters;
   letter=isVowel(letter);
   cout<<"the number of vowels are: "
   cin >> num;
}

bool isVowel(char ch)
{
   char letter;
   if(letter=='a')
      return true;
   else if (letter =='e')
      return true;
   else if(letter=='i')
      return true;
   else if (letter =='o')
      return true;
   else if (letter =='u')
      return true;
   else
      return false;
}

[dmjpro]

cin >> letters is letters defined before ......

i think u better to use gets instead of cin>> ....

welcome again

[Extremist]

Why are you using this?:

cin >> num;

You would do something like this:

bool isVowel(char ch)
{

  if(ch =='a')
           return 1;
  if(ch =='e')
           return 1;
  if(ch =='i')
           return 1;
  if(ch =='o')
           return 1;
  if(ch =='u')
           return 1;
  else
          return 0;
}

Iterate through each letter of the sequence which was input by the user
and say something like:

if(isVowel(letters[x]))
     num++;

Go look at how to declare letters, you didn't declare it right

[DeMan]

Or alternatively (I'll assume you first convert to lowercase, but if you don't the modification is trivial)....

int isVowel(char ch)
{
  switch(ch)
  {
    case 'a':
    case 'e':
    case 'i':
    case 'o':
    case 'u':
      return 1;
    default:
      return 0;
  }
}

and you can call it by

num = num + isVowel(letters[x]);