c++ STL排序

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

using std::string;
using std::cout; using std::endl;
using std::vector;

int main()
{
   
	vector<int> a{
   4,2,3,5,1,8,6};

    
    std::sort(a.begin(),a.end(),std::greater<int>());    
    cout<<"从大到小: ";
    for(auto item : a) cout<<item<<" ";
    cout<<endl;
    
    std::sort(a.begin(),a.end(),std::less<int>());    
    cout<<"从小到大: ";
    for(auto item : a) cout<<item<<" ";
    cout<<endl;

    return 0;
}

结果