新建 文本文档.txt

是密码学加减密中中的重要算法

/***************************************************************************
#include <iostream>
#include <vector>
#include <functional>
#include <iterator>
#include <algorithm>
using namespace std ;

template <typename In, typename Out, typename Op>
Out Transform (In frist, In last, Out result, Op op)
{
	for (; frist != last; ++frist, ++result)
	{
		*result = op (*frist) ;
	}
	return result ;
}

int main()
{
	vector <int> coll1 ;
	vector <int> coll2 ;
	coll1.push_back (1) ;
	coll1.push_back (2) ;
	coll1.push_back (2) ;

	coll2.push_back (1) ;
	coll2.push_back (2) ;
	coll2.push_back (1) ;
	
	//必须 coll1.size() >= coll2.size()

	transform (coll1.begin(), coll1.end(), coll2.begin(), negate<int>()) ;
	copy (coll2.begin(), coll2.end(), ostream_iterator<int>(cout," ") );

	return 0 ;
}

// output : -1 -2 -2
*****************************************************************************/