Обработка строки Char

#include <iostream>
 
using namespace std;
 
int main()
{
    const int size = 20;
    char stringToProcess[ size ];
  
    cin.getline( stringToProcess, size, '\n' );
 
    int currentIndex = 0;
    int arrayOfResults[ size ] = { 0 };
    int tallying = 0;
 
    char * stringPtr = stringToProcess;
    int * resultsPtr = arrayOfResults;
 
    do {
        checkString( currentIndex, tallying, stringPtr, resultsPtr)
    } while ( currentIndex != size - 1 )
 
    cout << arrayOfResults[ findMax( arrayOfResults, size ) ] << endl;
 
    return 0;
}
 
void checkString( int & index, int & tallying, const char * ourString, int * results )
{
    if ( checkCharracter( ourString[ index ] ) == true )
    {
        results[ index - tallying ] = tallying;
        index++;
    }
    else
    {
        tallying++;
        checkString( index + 1, tallying, ourString, results )
    }
}
 
bool checkCharracter( const char symbol )
{
    if ( ( ( static_cast<int>( symbol ) >= 65 ) && ( static_cast<int>( symbol ) <= 90 ) ) || ( ( static_cast<int>( symbol ) >= 97 ) && ( static_cast<int>( symbol ) <= 122 ) ) )
        return true;
    else
        return false;
}
 
int findMax( const int * results, const int size )
{
    int max = results[ 0 ];
    int index = 0;
    
    for ( int i = 1; i < size; i++ )
    {
        if ( results[ i ] > max )
        {
            max = results[ i ];
            index = i;
        }
    }
 
    return index;
}