/*

	STL - <algorithm> - sort

	template< class RandomIt, class Compare >

	　　void sort( RandomIt first, RandomIt last, Compare comp );

			Eg:sort(array,array+10,bool cmpFunc)

	template< class RandomIt >

	　　void sort( RandomIt first, RandomIt last );

			Eg:sort(vector.begin(),vector.end(),bool cmpFunc)

*/

#include <algorithm>

#include <iostream>

using namespace std;  

bool com(int a,int b) {

//	return a>b; //降序

	return a<b;//升序

}  

int main(){

	int a[10]={9,6,3,8,5,2,7,4,1,0};

	for(int i=0;i<10;i++)

		cout<<a[i]<<"\t";

	cout<<endl;

	sort(a,a+10,com);//com函数作为可选(自定义)的传入参数

 	for(int i=0;i<10;i++)

 		cout<<a[i]<<"\t";

 	return 0;

}

/*

9       6       3       8       5       2       7       4       1       0

0       1       2       3       4       5       6       7       8       9

*/

#include <iostream>

#include <algorithm>

#include <vector>

using namespace std;  

template<class T>

struct plus2

{

    void operator()(T&x)const

    {

        x+=2;

    }  

};  

void printElem(int& elem)

{

  cout << elem << endl;

}  

int main()

{

    int ia[]={0,1,2,3,4,5,6};

    for_each(ia,ia+7,printElem);//输出  

    int ib[]={7,8,9,10,11,12,13};

    vector<int> iv(ib,ib+7);

    for_each(iv.begin(),iv.end(),plus2<int>());//更改元素

    for_each(iv.begin(),iv.end(),printElem);//输出

    return 0;

}