[백준]10814-나이순 정렬(설명X)

//#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <algorithm>
using namespace std;
 
class Client {
private:
    int age, order;
    char name[101];
public:
    void setInfo(int age, char* name, int order) {
        int i;
        this->age = age;
        for (i = 0; name[i] != NULL; i++)
            this->name[i] = name[i];
        this->name[i] = NULL;
        this->order = order;
    }
    bool operator<(Client client) {
        if (this->age < client.age)
            return true;
        else if (this->age == client.age)
            return this->order < client.order;
        else
            return false;
    }
    void printInfo() {
        printf("%d %s\n", age, name);
    }
};
 
int main() {
    int input;
    cin >> input;
    Client* client = new Client[input];
    for (int i = 0; i < input; i++) {
        int age;
        char name[101];
        scanf("%d %s", &age, name);
        client[i].setInfo(age, name, i);
    }
    sort(client, &client[input]);
    for (int i = 0; i < input; i++)
        client[i].printInfo();
    delete[] client;
}