PAT 1036 Boys vs Girls

#include <cstdio>

#include <iostream>

#include <cstdlib>

#include <algorithm>



using namespace std;



class Stu {

    public:

        char name[12];

        char id[12];

        int grade;

        char gender;

};



bool my_cmp(const Stu* a, const Stu* b) {

    return a->grade < b->grade;

}



void print (vector<Stu*> &stu) {

    int len = stu.size();

    for (int i=0; i<len; i++) {

        printf("%s %d\n", stu[i]->name, stu[i]->grade);

    }

}



int main() {

    vector<Stu*> male;

    vector<Stu*> female;

    int n = 0;

    scanf("%d", &n);

    

    for (int i=0; i<n; i++) {

        Stu* p = new Stu();

        scanf("%s %c %s %d", p->name, &(p->gender), p->id, &(p->grade));

        

        if (p->gender == 'M') {

            male.push_back(p);

        } else {

            female.push_back(p);

        }

    }

    sort(male.begin(), male.end(), my_cmp);

    sort(female.begin(), female.end(), my_cmp);



    Stu* best = NULL;

    Stu* worst= NULL;

    

    if (female.empty()) {

        printf("Absent\n");

    } else {

        best = female[female.size() - 1];

        printf("%s %s\n", best->name, best->id);

    }

    if (male.empty()) {

        printf("Absent\n");

    } else {

        worst = male[0];

        printf("%s %s\n", worst->name, worst->id);

    }

    if (worst == NULL || best == NULL) {

        printf("NA\n");

    } else {

        printf("%d", best->grade - worst->grade);

    }

    return 0;

}

我感觉自己已经成脑残了，竟然忘了传my_cmp