String Tokenizer Class in C++

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Introduction

This class helps the user to tokenize the Long string by specifying delimiter. I thought this will be helpful to the programmers who are at beginning stage.

Code Listing

// Constructor that takes 2 arguments 

// first argument is of string type that to be tokenized. 

// second argument is of string type that is used as token separator 

// and default separator is space 

StringTokenizer::StringTokenizer(CString str,CString sep=" ") 
{ 
    index=0; 
    count=0; 
    CString str1=""; 
    for (int i=0;i<str.GetLength() && sep.GetLength()==1;i++) 
    { 
        if(str.GetAt(i)==sep.GetAt(0)) 
        { 
            elements.Add(str1); 
            str1=""; 
        } 
        else 
        { 
            str1+=str.GetAt(i); 
        } 
    } 
    elements.Add(str1); 
    count=elements.GetSize (); 
} 
// Method is used to fetch the tokens. 

CString StringTokenizer::getNextElement() 
{ 
    index++; 
    if(index==count) 
    { 
        throw CString("Index out of Bounds"); 
    } 
    return elements.GetAt(index-1); 
} 
//method used to fetch the count of tokens from the string 

int StringTokenizer::countElements() 
{ 
    return count; 
} 

//fetch the elements at given position 

CString StringTokenizer::elementAt(int index) 
{ 
    if(index>=count ||index<0) 
    { 
        throw CString("Index out of Bounds"); 
    } 
    else 
        return elements.GetAt(index); 
}