Klassenobjekt mit Blasensortierung vergleichen

Question

Aufgabe: Modell in OOP eine Klasse namens Student, die den Namen, Nachnamen und die Noten der Wintersitzungsprüfungen enthält. Zeigen Sie den Namen der Schüler an, die die Prüfungen nicht bestanden haben, und die ersten drei Schüler in der Gruppe.

Ich habe Probleme beim Vergleich der Noten (die ersten drei Studenten).

Mein Code:

#define _CRT_SECURE_NO_WARNINGS 

#include<iostream> 
using namespace std; 
#include <string> 
#include<stdio.h> 

class Student { 
private: 
    char nume[10];                  
    char prenume[20]; 
    double matematica; 
    double fizica; 
    double programare; 

public: 
    Student(char num[10], char pren[20], double mate, double fiz, double progra); 
    void afis();    
    void citire_stud(); 
    int restanta(); 
    double media(); 


}; 

Student::Student(char num[10] = "", char pren[20] = "", double mate = 0, double fiz = 0, double progra = 0) 
{ 
    strcpy(nume, num); 
    strcpy(prenume, pren); 
    matematica = mate; 
    fizica = fiz; 
    programare = progra; 
} 


void Student::afis() 
{ 
    cout << "Nume: " << nume << endl; 
    cout << "Prenume: " << prenume << endl; 
    cout << "Nota la matematica: " << matematica << endl; 
    cout << "Nota fizica: " << fizica << endl; 
    cout << "Nota programare: " << programare << endl; 
    cout << endl; 

} 

void Student::citire_stud() 
{ 
    char num[10]; 
    char pren[20]; 
    double mate, fiz, progra; 

    cout << "Introduceti numele studentului: " << endl; 
    cin >> num; 
    strcpy(nume, num); 

    cout << "Introduceti preumele studentului: " << endl; 
    cin >> pren; 
    strcpy(prenume, pren); 

    cout << "Introduceti nota la mate studentului: " << endl; 
    cin >> mate; 
    matematica = mate; 

    cout << "Introduceti nota la fizica studentului: " << endl; 
    cin >> fiz; 
    fizica = fiz; 

    cout << "Introduceti nota la programare studentului: " << endl; 
    cin >> progra; 
    programare = progra; 

} 

int Student::restanta() //arrears 
{ 
    if (matematica < 5 || programare <5 || fizica < 5) 
     return 1; 
    else return 0; 
} 

double Student::media() 
{ 
    double med; 
    med = (matematica + fizica + programare)/3; 
     return med; 

} 

void main() 
{ 
    int cont = 0; 
    int res[10]; 
    int nr; 

    cout << "Cati studenti sunt(max 10): "; //How many students 
    cin >> nr; 

    Student ob2[10], temp; 
    for (int i = 0;i < nr;i++) 
    { 
     ob2[i].citire_stud(); 
     if (ob2[i].restanta()) 
     { 

      res[cont++] = i;   
     } 

    } 
    if (cont == 0) 
    { 
     cout << "Nu sunt studenti restanti! " << endl; 
     goto jmp; 
    } 
    else 
    { 
     cout << "\nStundetii restanti sunt: " << endl; 
     int i = 0; 
     int k = 0; 
     do 
     { 
      k = res[i]; 
      ob2[k].afis(); 
      i++; 

     } while (i != cont);  
    } 

    jmp: 
    cout << "\n\n\n\nStudentii in ordinea medilor sunt: " << endl; 

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

     if (ob2[i].media() < ob2[i + 1].media()) //Not working 
     { 
      temp = ob2[i]; 
      ob2[i] = ob2[i + 1]; 
      ob2[i + 1] = temp; 



     } 
    } 
     for (int i = 0;i < nr;i++) 
      ob2[i].afis(); 


    system("pause"); 

} 

Ausgang: Output

Es sollte: 9-- 7 - 5

Answer 1

Ihre Blase Art ist gebrochen. A) Sie brauchen 2 Schleifen. B) Sie gehen außerhalb der Grenzen. Ändern Sie es zu so etwas wie:

for (int j = 0; j < nr; j++) 
{ 
    for (int i = 0;i < nr - 1 ; i++) 
    { 

     if (ob2[i].media() < ob2[i + 1].media()) 
     { 
      temp = ob2[i]; 
      ob2[i] = ob2[i + 1]; 
      ob2[i + 1] = temp; 
     } 
    } 
}