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Const Iterators

Const Iterators

You can think of an iterator as a pointer to elements of a container. All STL (Standard Template Library) containers provide the basic iterator type along with its const counterpart. The const iterator of a container should be used when the elements accessed through it are not supposed to be modified, like in the following example:

 void main() {	string s ("hello world"); // s contains 11 characters 	string::const_iterator p = s.begin(); //p is a const iterator pointing to the first element of s 	size_t n = 0; 	while ( p 

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