proiect elevi

#include <iostream>
#include <fstream>
#include <string.h>

using namespace std;

struct nod {
    char nume[50];
    char prenume[50];
    float notaLimbaRomana;
    float notaMatematica;
    float notaPurtare;
    float medieGenerala;
    nod* next;
};

void initializare(nod* &p);
void adaugareDreapta(nod* &p, nod* &u);
void afisare(nod * p);
int numarDeElementeInLista(nod *p);
float calculareMedieGeneralaEleviPromovati(nod *p);
int eCorigent(nod *elev);
void afisareEleviPromovatiInOrdineDescAMediei(nod * &p);
int calculEleviPromovati(nod *p);
void afisareStudentiCorigenti(nod * p);

int main() {
    ifstream file("elevi.in");
    char line[255];
    nod* primulStudent = nullptr;

    while (file.getline(line, sizeof(line))) {
        char *token = strtok(line, ",");
        nod *studentulCurent = new nod;
        strcpy(studentulCurent->nume, token);
        token = strtok(NULL, ",");
        strcpy(studentulCurent->prenume, token);
        token = strtok(NULL, ",");
        studentulCurent->notaLimbaRomana = atof(token);\
        token = strtok(NULL, ",");
        studentulCurent->notaMatematica = atof(token);
        token = strtok(NULL, ",");
        studentulCurent->notaPurtare = atof(token);
        token = strtok(NULL, ",");
        studentulCurent->medieGenerala = atof(token);
        if (primulStudent == nullptr) {
            primulStudent = studentulCurent;
            initializare(primulStudent);
        } else {
           adaugareDreapta(primulStudent, studentulCurent);
        }
    }
    afisare(primulStudent);
    cout << "Cerinta 1. \n";
    cout << "Media generala a elevilor care nu sunt corigenti: " << calculareMedieGeneralaEleviPromovati(primulStudent);
    cout << "\nCerinta 2.\n";
    cout << "Afisare elevi promovati in ordinea descrescatoare a mediei generale: \n";
    afisareEleviPromovatiInOrdineDescAMediei(primulStudent);
    cout <<"\nCerinta 3\n";
    cout << "Afisare baza de date elevi corigenti:\n ";
    afisareStudentiCorigenti(primulStudent);
}

void initializare(nod* &primulNod) {
    {
        primulNod->next = nullptr;
    }
}

void adaugareDreapta(nod* &primulNod, nod* &nodDeAdaugat) {
    nod *curent;
    curent = primulNod;
    while (curent->next != nullptr){
        curent = curent->next;
    }
    curent->next = nodDeAdaugat;
    nodDeAdaugat->next = nullptr;
}

void afisareEleviPromovatiInOrdineDescAMediei(nod * &p) {
    nod *elevulCurent;
    elevulCurent = p;
    int numarEleviPromovati = calculEleviPromovati(elevulCurent);
    struct nod eleviPromovati[numarEleviPromovati];

    int i =0;
    while (elevulCurent != nullptr) {
        if (!eCorigent(elevulCurent)) {
            eleviPromovati[i] = *elevulCurent;
            i++;
        }
        elevulCurent = elevulCurent->next;
    }

    for (int i = 0; i < numarEleviPromovati; i++) {
        for (int j = 0; j < numarEleviPromovati-1; j++) {
            if (eleviPromovati[j].medieGenerala < eleviPromovati[j+1].medieGenerala) {
                nod temp = eleviPromovati[i];
                eleviPromovati[i] = eleviPromovati[j];
                eleviPromovati[j] = temp;
            }
        }
    }

    for (int i = 0; i < numarEleviPromovati; i++) {
        cout << eleviPromovati[i].nume << " " << eleviPromovati[i].prenume << endl;
    }
}


float calculareMedieGeneralaEleviPromovati(nod* primulNod) {
    int numarElevi=0;
    float sumaNote = 0.0;
    nod *temp = primulNod;
    while (temp->next != nullptr) {
        if (!eCorigent(temp)) {
            sumaNote += temp->medieGenerala;
            numarElevi++;
        }
        temp = temp->next;
    }
    return sumaNote / numarElevi;
}

int eCorigent(nod* elev) {
    if (elev->notaMatematica < 5 || elev->notaLimbaRomana < 5) {
        return 1;
    } else {
        return 0;
    }
}

void adaugareStanga(nod* &primulNod, nod* &nodDeAdaugat) {
    nodDeAdaugat->next = primulNod;
    primulNod = nodDeAdaugat;
}

void afisare(nod * p) {
    nod *c;
    c = p;
    while (c != 0) {
        cout<<"Nume: " << c->nume <<"\t";
        cout<<"\nPrenume: " << c->prenume <<"\t";
        cout<<"\nNota Lb. Romana: " << c->notaLimbaRomana << "\t";
        cout<<"\nNota Matematica: " << c->notaMatematica << "\t";
        cout<<"\nNota Purtare: " << c->notaPurtare << "\t";
        cout<<"\nNota Media Generala: " << c->medieGenerala << "\t";
        c = c->next;
        cout << endl<<endl<<endl;
    }
}
void afisareStudentiCorigenti(nod * p) {
    nod *elevulCurent;
    elevulCurent = p;
    while (elevulCurent != 0) {
        if (eCorigent(elevulCurent)) {
            cout<<"Nume: " << elevulCurent->nume <<"\t";
            cout<<"\nPrenume: " << elevulCurent->prenume <<"\t";
            cout << endl;
        }
        elevulCurent = elevulCurent->next;
    }
}


int calculEleviPromovati(nod *p) {
    int numar = 0;
    nod  *c = p;
    while(c != nullptr) {
        if (!eCorigent(c)) {
            numar++;
        }
        c = c->next;
    }
    return numar;
}