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    <p>Possibly reinventing the wheel, but damn useful on occasion:</p> <pre><code>// substring_container_adapter.h // // substring_container_adapter is useful for treating a single master string as a collection of substrings // for the purpose of enumerating over those substrings (read-only) // // NOTES: // (1) sequential forward access is reasonably efficient, but random access is definitely not very efficient. (bidirectional could be implemented) // (2) the strings must be valid for the lifetime of the adapter and any enumerators you obtain from the adapter // (3) uses a greedy algorithm - so whole sequences of delimiters are considered one separator, rather than multiple separators namespace details { template &lt;typename charT&gt; class substring_container_adapter { public: struct iterator : public std::iterator&lt;std::forward_iterator_tag, const charT *&gt; { // iterator constructor iterator(const charT * pszPosition, const charT * pszDelimeters) : m_pszPosition(pszPosition) , m_pszDelimeters(pszDelimeters) , m_pszEnd(FindOneOfOrNil(pszPosition, pszDelimeters)) { } // supported relational operators bool operator == (const iterator &amp; rhs) const { return m_pszPosition == rhs.m_pszPosition; } bool operator != (const iterator &amp; rhs) const { return m_pszPosition != rhs.m_pszPosition; } bool operator &lt; (const iterator &amp; rhs) const { return m_pszPosition &lt; rhs.m_pszPosition; } // increment to next substring iterator &amp; operator ++ () { const charT * pszNext = SkipDelimeters(m_pszEnd, m_pszDelimeters); if (pszNext) { m_pszPosition = pszNext; m_pszEnd = FindOneOfOrNil(m_pszPosition, m_pszDelimeters); } else { m_pszPosition += GetLength(m_pszPosition); } return *this; } // postfix increment const iterator operator ++ (int) { // note: the const return type flags misuse patterns (see More Effective C++, Item 6) iterator old(*this); ++(*this); return old; } // dereference == CString CString operator * () const { return CString(m_pszPosition, static_cast&lt;int&gt;(m_pszEnd - m_pszPosition)); } // iterators on our characters const charT * begin() const { return m_pszPosition; } const charT * end() const { return m_pszEnd; } private: const charT * m_pszPosition; const charT * m_pszDelimeters; const charT * m_pszEnd; }; typedef iterator const_iterator; public: substring_container_adapter(const charT * pszString, const charT * pszDelimeters) : m_pszString(pszString) , m_pszDelimiters(pszDelimeters) , m_end(pszString + GetLength(pszString), m_pszDelimiters) { } // iterators iterator begin() const { return iterator(m_pszString, m_pszDelimiters); }; iterator end() const { return m_end; }; private: const charT * m_pszString; // zero-terminated character array const charT * m_pszDelimiters; // delimiters const iterator m_end; // end delimiter }; } typedef details::substring_container_adapter&lt;TCHAR&gt; substring_container_adapter; </code></pre>
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    1. POReading a text file into c-string
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