用结构和STL常用算法实现对学生成绩的排序和查找（vector）

上代码：

//用结构和STL常用算法实现对学生成绩的排序和查找。
#include<iostream>
#include<vector>
#include<algorithm>
#include<cstring>
using namespace std;

struct Student
{
    string name;
    string id;
    double score;
    Student(string name_ = " ",string id_ = " ",double score_ = 0):
    name(name_),id(id_),score(score_) { }
    bool operator == (const Student& rhs)
    {
        return score== rhs.score;
    }
    bool operator < (const Student& rhs)
    {
        return (score < rhs.score);
    }
};

void Printvector(const vector<Student> & vv)
{
    typename vector<Student>::const_iterator i;
    for(i = vv.begin();i != vv.end();i++)
        cout<<i->name<<" "<<i->id<<" "<<i->score<<endl;
}

int main()
{
    vector <Student> v;
    int n,i = 0;
    string name_,id_;
    double score_;
    Student s1;
    cin>>n;
    while(1)
    {
        cin>>name_>>id_>>score_;
        v.push_back( Student(name_,id_,score_) ); 
        if(++i == n)
            break;
    }
    cout<<"请输入待查找成绩 ："<<endl; 
    cin>>score_;
    s1.score = score_;
    vector <Student> :: iterator p;
    p = find(v.begin(),v.end(),s1);
    if(p != v.end())
        cout<<"存在成绩 ："<<score_<<endl;
    else
        cout<<"不存在该成绩"<<endl; 
    sort(v.begin(),v.end());
    Printvector(v);
    return 0;
} 

2020-01-11