《C++》《STL初步》先知道怎麼用就好，不要陷於細節

#include<iostream>
#include<cstring>
#include<algorithm>
#include<set>
using namespace std;

struct Student
{
    char name[20];
    int id;
    int score;
};

Student students[] = { {"jack",112,78},{"mary",102,85},{"ala",333,92},{"zero",101,70},
{"cindy",102,78} };// struct array 初始化 {}

struct Rule {
    bool operator() (const Student &s1, const Student &s2) const {
        if (s1.score != s2.score)
            return s1.score > s2.score;
        else
            return (strcmp(s1.name, s2.name) < 0);
    }
};

int main()
{
    multiset<Student, Rule>st;
    for (int i = 0; i < 5; ++i)
        st.insert(students[i]);
    multiset<Student, Rule>::iterator p;
    for (p = st.begin(); p != st.end(); ++p)
    {
        cout << p->score << " " << p->name << " " << p->id << endl;
    }
    Student s = { "mary",1000,85 };
    p = st.find(s);
    if (p != st.end())
        cout << p->score << " " << p->name << " " << p->id<<endl;
    return 0;
}