reverse (STL Samples)

Illustrates how to use the reverse Standard Template Library (STL) function in Visual C++.

template<class BidirectionalIterator> inline
   void reverse(
      BidirectionalIterator First,
      BidirectionalIterator Last
   )

Remarks

Note

The class/parameter names in the prototype do not match the version in the header file. Some have been modified to improve readability.

The reverse algorithm reverses the order of the elements in the range [First, Last).

Example

// reverse.cpp
// compile with: /EHsc
// Illustrates how to use the reverse function.
//
// Functions:
//    reverse - Reverse the items in a sequence.

// disable warning C4786: symbol greater than 255 character,
// okay to ignore
#pragma warning(disable: 4786)

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <functional>

using namespace std;


int main()
{
   const int VECTOR_SIZE = 8;

   // Define a template class vector of strings
   typedef vector<string > StrVector;

   //Define an iterator for template class vector of strings
   typedef StrVector::iterator StrVectorIt;

   StrVector Tongue_Twister(VECTOR_SIZE);
   StrVectorIt start, end, it;

   // location of first element of Tongue_Twister
   start = Tongue_Twister.begin();

   // one past the location last element of Tongue_Twister
   end = Tongue_Twister.end();

   //Initialize vector Tongue_Twister
   Tongue_Twister[0] = "she";
   Tongue_Twister[1] = "sells";
   Tongue_Twister[2] = "sea";
   Tongue_Twister[3] = "shells";
   Tongue_Twister[4] = "by";
   Tongue_Twister[5] = "the";
   Tongue_Twister[6] = "sea";
   Tongue_Twister[7] = "shore";

   cout << "Before calling reverse" << endl;

   // print content of Tongue_Twister
   cout << "Try this Tongue Twister:";
   for (it = start; it != end; it++)
      cout << " " << *it;
   cout << endl;

   // reverse the items in the vector Tongue_Twister
   reverse(start, end);

   cout << "After calling reverse" << endl;

   // print content of Tongue_Twister
   cout << "Now try the reversed Tongue Twister:";
   for (it = start; it != end; it++)
      cout << " " << *it;
}

Output

Before calling reverse
Try this Tongue Twister: she sells sea shells by the sea shore
After calling reverse
Now try the reversed Tongue Twister: shore sea the by shells sea sells she

Requirements

Header: <algorithm>

See Also

Concepts

Standard Template Library Samples