Mega Code Archive
Copy all letters three elements behind the f
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/* The following code example is taken from the book
* "The C++ Standard Library - A Tutorial and Reference"
* by Nicolai M. Josuttis, Addison-Wesley, 1999
*
* (C) Copyright Nicolai M. Josuttis 1999.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*/
#include <iostream>
#include <vector>
#include <deque>
#include <list>
#include <set>
#include <map>
#include <string>
#include <algorithm>
#include <iterator>
#include <functional>
#include <numeric>
using namespace std;
/* PRINT_ELEMENTS()
* - prints optional C-string optcstr followed by
* - all elements of the collection coll
* - separated by spaces
*/
template <class T>
inline void PRINT_ELEMENTS (const T& coll, const char* optcstr="")
{
typename T::const_iterator pos;
std::cout << optcstr;
for (pos=coll.begin(); pos!=coll.end(); ++pos) {
std::cout << *pos << ' ';
}
std::cout << std::endl;
}
/* INSERT_ELEMENTS (collection, first, last)
* - fill values from first to last into the collection
* - NOTE: NO half-open range
*/
template <class T>
inline void INSERT_ELEMENTS (T& coll, int first, int last)
{
for (int i=first; i<=last; ++i) {
coll.insert(coll.end(),i);
}
}
int main()
{
/* initialize source collection with ''..........abcdef..........''
*/
vector<char> source(10,'.');
for (int c='a'; c<='f'; c++) {
source.push_back(c);
}
source.insert(source.end(),10,'.');
PRINT_ELEMENTS(source,"source: ");
// copy all letters three elements in front of the 'a'
vector<char> c1(source.begin(),source.end());
copy (c1.begin()+10, c1.begin()+16, // source range
c1.begin()+7); // destination range
PRINT_ELEMENTS(c1,"c1: ");
// copy all letters three elements behind the 'f'
vector<char> c2(source.begin(),source.end());
copy_backward (c2.begin()+10, c2.begin()+16, // source range
c2.begin()+19); // destination range
PRINT_ELEMENTS(c2,"c2: ");
}
/*
source: . . . . . . . . . . a b c d e f . . . . . . . . . .
c1: . . . . . . . a b c d e f d e f . . . . . . . . . .
c2: . . . . . . . . . . a b c a b c d e f . . . . . . .
*/
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