generate()

功能:用指定函数对象产生的值去给容器指定范围内元素赋值

template<class ForwardIterator, class Generator>
   void generate(
      ForwardIterator _First, 
      ForwardIterator _Last, 
      Generator _Gen
   );

generate_n()

功能:一个函数对象产生的值给一定的范围内指定数目的容器元素赋值

template<class OutputIterator, class Diff, class Generator>
   void generate_n(
      OutputIterator _First, 
      Diff _Count, 
      Generator _Gen
   );

example:

#include <iostream>
#include <vector>
#include <algorithm>


using namespace std;


class IntSequence
{
private:
	int m_Value;
public:
	IntSequence(int value):m_Value(value){}		
	int operator()()
	{
		return m_Value++;
	}
};


int main()
{
	vector<int> IntVec;
	generate_n(back_inserter(IntVec),9,IntSequence(1));
	for(vector<int>::iterator it=IntVec.begin();it!=IntVec.end();++it)
	{
		cout<<*it<<" ";
	}
	cout<<endl;
	generate(++IntVec.begin(),--IntVec.end(),IntSequence(10));
	for(vector<int>::iterator it=IntVec.begin();it!=IntVec.end();++it)
	{
		cout<<*it<<" ";
	}
	cout<<endl;
	return 0;
}

结果:

1,2,3,4,5,6,7,8,9

1,10,11,12,13,14,15,16,9