transf1.cpp

来自「C#一个实例源代码」· C++ 代码 · 共 40 行

/* 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 "algostuff.hpp"
using namespace std;

int main()
{
    vector<int> coll1;
    list<int> coll2;

    INSERT_ELEMENTS(coll1,1,9);
    PRINT_ELEMENTS(coll1,"coll1:   ");

    // negate all elements in coll1
    transform (coll1.begin(), coll1.end(),      // source range
               coll1.begin(),                   // destination range
               negate<int>());                  // operation
    PRINT_ELEMENTS(coll1,"negated: ");

    // transform elements of coll1 into coll2 with ten times their value
    transform (coll1.begin(), coll1.end(),      // source range
               back_inserter(coll2),            // destination range
               bind2nd(multiplies<int>(),10));  // operation
    PRINT_ELEMENTS(coll2,"coll2:   ");

    // print coll2 negatively and in reverse order
    transform (coll2.rbegin(), coll2.rend(),    // source range
               ostream_iterator<int>(cout," "), // destination range
               negate<int>());                  // operation
    cout << endl;
}