count vowels from string using isvowel, how do get vowels from the string

[Newbie318]

#include <iostream>
#include <string>

using namespace std;

bool isVowel(char);

int main ()
{  
   // Declare variables.
   string word;
   char ch;  
   int numOfVowel = 0;  
   int vowel; 
    
   // Get letters from the user. 
   cout << "Please enter a sequence of letters: " << endl << ">";  
   cin >> word; 
   vowel = isVowel(ch);
    
   // Loop to grab all letters.
   while (ch != '\n')  
    {  
       if (vowel == true) 
       {     
       numOfVowel++;  
       cin.get(ch); 
       }
    }  
   // Output statment to user with number of vowels found.
   cout << "The number of vowels is sequence is: " << numOfVowel << endl;      
   
   system("pause");  
   return 0;  
   
   // Function to find the vowels.
}
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) 
     {
     return true;
     }
     else return false;        
}

[johny10151981]

In C/C++ string array is null terminated, it means the string will be considered end if the default string processing functions found 0(integer zero, not character zero). If it dont find the 0 it will continue its process, and may cause segmentation fault.


Here is a simple method of how to access all the character individually in a string(char array)

for(i=0;a[i]!=0; i++)
{
 printf("%c",a[i]);
}