Lista simpla inlantuita

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#define LINESIZE 128
typedef struct Student {
	int anulDeNastere;
	char* nume;
	int  nrNote;
	float* note;
} Student;

Student adaugareStudent(int _anulDeNastere, const char*_nume, int _nrNote, float* note ) {
	Student s;
	s.anulDeNastere = _anulDeNastere;

	s.nume = malloc((strlen(_nume) + 1)* sizeof(char) );
	strcpy(s.nume, _nume);
	
	s.nrNote = _nrNote;

	

	if(s.nrNote > 0 && note !=NULL){

		s.note = malloc(s.nrNote * sizeof(float));
	for (int i = 0; i < s.nrNote; i++)
		s.note[i] = note[i];
		}
	else {
		s.nrNote = 0;
		s.note = NULL;
	}
	return s;
}
typedef struct Node Node;

struct Node {
	Student student;
	Node* next;
};


void insertAtEnd(Node** start, Student student) {
	Node* newNode = malloc(sizeof(Node));
	newNode->next = NULL;
	newNode->student = student;

	if (*start) {
		
		Node* aux = *start;
		while (aux->next) aux = aux->next;
		aux->next = newNode;
	}
	else {
		*start = newNode;
	}

}
void insertAtBeginning(Node** start, Student student) {
	Node* newNode = malloc(sizeof(Node));
	newNode->next = *start;
	newNode->student = student;

	*start = newNode;
}

Student stergereStudentInceput(Node** start) {

	if (*start) {
		Node* nodSters = *start;
		Student studentSters = nodSters->student;
		*start = (*start)->next;
		free(nodSters);

		return studentSters;

	}
	else {
		printf("Lista este goala!");
		Student err = { .anulDeNastere = 0, .nume = "err",.nrNote = 0, .note = NULL };
		return err;
	}


}

Student stergereStudentFinal(Node** start) {

	if (*start) {
		//Un singur nod
		if ((*start)->next == NULL) {
			Node* nodSters = *start;
			Student studentSters = (*start)->student;
			*start = NULL;
			free(nodSters);
			return studentSters;
		}
		else
		{//mai multe noduri
			Node* nodCurent = *start;

			while (nodCurent->next->next != NULL)
				nodCurent = nodCurent->next;
			Node* nodSters = nodCurent->next;
			Student studentSters = nodSters->student;

			nodCurent->next = NULL;
			free(nodSters);

			return studentSters;

		}

	}
	else {
		printf("Lista este goala !");
		Student err = { .anulDeNastere = 0, .nume="Err", .nrNote=0,.note=NULL};
		return err;
	}

}

void printStudent(Student student) {
	printf("Studentul %s nascut in anul %i cu cele %i note:", student.nume, student.anulDeNastere, student.nrNote);
	for (int i = 0; i < student.nrNote; i++)
		printf("%.2f ", student.note[i]);
	printf("\n");
}
void parseListPrint(Node* start) {
	while (start) {
		printStudent(start->student);
		start = start->next;
	}
}

Student citireStudentFisier(char* buffer) {

	
	//Creez o structure de tip Student
	Student student;

	//Populez structura
	//cream tokenurile
	char* token;
	token = strtok(buffer, ",");

	student.anulDeNastere = atoi(token);

	token = strtok(NULL, ",");
	student.nume = malloc( (strlen(token)+1)*sizeof(char) );
	strcpy(student.nume, token);

	token = strtok(NULL, ",");
	student.nrNote = atoi(token);

	if (student.nrNote > 0) {
		student.note = malloc(student.nrNote * sizeof(float));
		for (int i = 0; i < student.nrNote; i++)
		{
			token = strtok(NULL, ",");
			student.note[i] = atof(token);
		}
	}
	else {
		student.nrNote = 0;
		student.note = NULL;
	}
	return student;

}
void citireStudentiFisier(Node** Start, int* nrStudenti, const char* fileName) {
	FILE* f = fopen(fileName, "r");
	char buffer[LINESIZE];


	if (f) {
		while (fgets(buffer,LINESIZE,f)) {
			insertAtEnd(Start, citireStudentFisier(buffer));
			(*nrStudenti)++;
		}

		fclose(f);
	}
	else printf("Fisierul %s nu s-a putut deschide",fileName);


}


int main() {
	
	int nrStudenti=0;
	Node* list = NULL;

	float Note[] = { 9.3,4.3,9 };
	

	citireStudentiFisier(&list,&nrStudenti,"Studenti.txt");

	parseListPrint(list);
	
	printf("%d studenti au fost cititi din fisier ", nrStudenti);



	insertAtEnd(&list, adaugareStudent(2004, "Iordachi Ionut", 3, Note));
      nrStudenti++;
	printf("\n------Dupa Modificare (adaugare final )-----------\n");

	parseListPrint(list);

	//insertAtBeginning
	insertAtBeginning(&list, adaugareStudent(2001, "Iordachi Bianca", 3, Note));

    printf("\n------Dupa Modificare (adaugare la inceput )-----------\n");

	parseListPrint(list);
	//	
	//
	//printf("\n------Dupa Modificare (stergere inceput )-----------\n");
	//Student studentExmatriculat = stergeStudentDeLaInceput(&list); nrStudenti--;
	//printf("\n------studentul sters :"); printStudent(studentExmatriculat);
	//parseListPrint(list);

	printf("\n------Dupa Modificare (stergere final )-----------\n");
	Student studentExmatriculat2 = stergereStudentFinal(&list); nrStudenti--;
	printf("\n------studentul sters :"); printStudent(studentExmatriculat2); printf("\n");
	parseListPrint(list);
	return 0;
}