ООП и все такое

class Student {
//...  
};
 
class AcademicGroup {
public:
    AcademicGroup(unsigned amount_of_students = 0)
    {
        students = amount_of_students;
        student = new Student [amount_of_students]();
    }
 
    ~AcademicGroup()
    {
        delete [] student;
    }
private:
    Student* student;
    unsigned students;
};

student = new Student [amount_of_students]();//динамический массив объектов типа Student

for(int i=0; i!=amount_of_students; ++i) function(student[i]);

student = new Student [10]();
Student* tmp = new Student [20]();
for (int i = 0; i < 10; ++i)
    tmp[i] = student[i];
delete [] student;
student = tmp;
//дальше работаем со student

#include <vector>
class Student {
//...  
};
 
int main() {
  std::vector<Student> AcademicGroup;
  Student stud1; // здесь еще добавляем нужные данные в объект класса Student
  Student stud2; // здесь еще добавляем нужные данные в объект класса Student
  AcademicGroup.push_back(stud1);
  AcademicGroup.push_back(stud2);
}

#include <iostream>
#include <conio.h>
#define and &&
#define or ||
#define name_length 20
//#define mobile_length 11
using namespace std;
 
//____________________GLOBAL DATA___________________|
 
//Class Student
class STUDENT
{
private:
    char chFirstName[name_length];
    char chLastName[name_length];
    char chMobileNumber[mobile_length];
public:
    STUDENT();
    STUDENT *p;
    void vPrintStudent();
    bool bCompare(char str[name_length]);
//  bool bCompare(int num[mobile_length]);
    void vSetStudent(/*char FirstName[name_length], char LastName[name_length], int MobileNumber[mobile_length]*/);
    ~STUDENT();
};
 
//class Group
class GROUP
{
private:
    int iStudentNumber; //Number of Students in a group
    STUDENT *pHead;
    STUDENT *pTail; 
public:
    GROUP();
    void vSearchStudent(bool select); //Search student [1-via Last name] [0-via Phone number]
    void vPrintList(); //Print list of students
    void vAddStudent(); //Add new student
    void vRemoveStudent(); //Delete Student
    ~GROUP();
};
 
//Objects
STUDENT student;
GROUP group;
 
 
//_____________________FUNCTIONS_____________________|
 
//Work program
void Work();
 
//Print operations
void PrintOperations();
 
 
 
 
 
 
 
 
//_______________________MAIN________________________|
 
int main()
{
    Work();
    return 0;
}
 
 
 
 
 
 
//_________________FUNCTION DEFINE___________________|
 
void Work()
{
    char choice;
 
//  GROUP();
    do
    {
        system("cls");
        PrintOperations();
        cin >> choice;
        
        switch (choice)
        {
            case '1': group.vAddStudent(); break;
            case '2': group.vSearchStudent(1); break;
            case '3': group.vSearchStudent(0); break;
            case '4': group.vPrintList(); break;
        }
    }
    while (choice != '5');
//  group.~GROUP();
}
 
 
void PrintOperations()
{
    system("cls");
    cout << "Chose the operation:\n";
    cout << "1. Add student\n";
    cout << "2. Find student(via phone number)\n";
    cout << "3. Find student(via Last name)\n";
    cout << "4. Print group\n";
    cout << "5. Exit\n";
}
 
 
GROUP::GROUP()
{
    cout << "Enter the student data for list formation:\n";
    STUDENT *pv = new STUDENT;
    pv->vSetStudent();  //3aMEHa need
    pv->p = NULL;
    pHead = pTail = pv;
}
 
void GROUP::vAddStudent() //re-define
{
    system("cls");
    STUDENT *pv = new STUDENT;
    pv->vSetStudent();
    pv->p = NULL;
    pTail->p = pv;
    pTail = pv;
}
 
void GROUP::vPrintList()
{
    system("cls");
    cout << "Group list\n";
    STUDENT *pv = pHead;
    pv->vPrintStudent();
    while (pv->p!=NULL)
    {
        pv = pv->p;
        pv->vPrintStudent();
    }
    getch();
}
 
void GROUP::vSearchStudent(bool select)
{
    char number[name_length];
    char name[name_length];
    
    system("cls");
    STUDENT *pv = pHead;
    if (select)
    {
        cout <<"Enter the Last name of Student:";
        cin >> name;
        if (pv->bCompare(name)) pv->vPrintStudent();
        while (pv->p!=NULL)
        {
            pv = pv->p;
            if (pv->bCompare(name)) pv->vPrintStudent();
        }
    }
    else
    {
        cout << "Enter the phone number of Student";
        cin >> number[mobile_length];
        if (pv->bCompare(number)) pv->vPrintStudent();
        while (pv->p!=NULL)
        {
            pv = pv->p;
            if (pv->bCompare(number)) pv->vPrintStudent();
        }
    }
    system("cls");
    cout << "results:\n";
}
 
void STUDENT::vPrintStudent()
{
    cout << chFirstName[name_length] <<"  ";
    cout << chLastName[name_length] << "  ";
    cout << chMobileNumber[mobile_length] << "\n";
}
 
void STUDENT::vSetStudent()
{
    system("cls");
 
    cout << "\nEnter name of student:";
    cin >> chFirstName;
 
    cout << "\nEnter last Name of Student";
    cin >> chLastName;
 
    cout << "\nEnter mobile number of student";
    cin >> chMobileNumber;
}
 
bool STUDENT::bCompare(char str[name_length])
{
    if (!strcmp(str,chFirstName)) 
        return 1;
    else 
        return 0;
}
 
GROUP::~GROUP()
{
    STUDENT *temp = pHead;
    while (pHead->p!=NULL)
    {
            pHead = pHead->p;
            delete temp;
            temp = pHead;
    }
    cout << "\nThe memory is free";
}

#include <iostream>
#include <conio.h>
#define and &&
#define or ||
#define name_length 20
using namespace std;
 
//____________________GLOBAL DATA___________________|
 
//Class Student
class STUDENT
{
private:
    char chFirstName[name_length];
    char chLastName[name_length];
    char chMobileNumber[mobile_length];
public:
    STUDENT *p;
    void vPrintStudent();
    bool bCompare(char str[name_length]);
//  bool bCompare(int num[mobile_length]);
    void vSetStudent(/*char FirstName[name_length], char LastName[name_length], int MobileNumber[mobile_length]*/);
};
 
//class Group
class GROUP
{
private:
    int iStudentNumber; //Number of Students in a group
    STUDENT *pHead;
    STUDENT *pTail; 
public:
    GROUP();
    void vSearchStudent(bool select); //Search student [1-via Last name] [0-via Phone number]
    void vPrintList(); //Print list of students
    void vAddStudent(); //Add new student
    void vRemoveStudent(); //Delete Student
    ~GROUP();
};
 
//Objects
STUDENT student;
GROUP group;
 
 
//_____________________FUNCTIONS_____________________|
 
//Work program
void Work();
 
//Print operations
void PrintOperations();
 
 
 
 
 
 
 
 
//_______________________MAIN________________________|
 
int main()
{
    Work();
    return 0;
}
 
 
 
 
 
 
//_________________FUNCTION DEFINE___________________|
 
void Work()
{
    char choice;
 
    do
    {
        PrintOperations();
        cin >> choice;
        
        switch (choice)
        {
            case '1': group.vAddStudent(); break;
            case '2': group.vSearchStudent(1); break;
            case '3': group.vSearchStudent(0); break;
            case '4': group.vPrintList(); break;
        }
    }
    while (choice != '5');
}
 
 
void PrintOperations()
{
    system("cls");
    cout << "Chose the operation:\n";
    cout << "1. Add student\n";
    cout << "2. Find student(via phone number)\n";
    cout << "3. Find student(via Last name)\n";
    cout << "4. Print group\n";
    cout << "5. Exit\n";
}
 
 
GROUP::GROUP()
{
    cout << "Enter the student data for list formation:\n";
    STUDENT *pv = new STUDENT;
    pv->vSetStudent();
    pv->p = NULL;
    pHead = pTail = pv;
}
 
void GROUP::vAddStudent() 
{
    system("cls");
    STUDENT *pv = new STUDENT;
    pv->vSetStudent();
    pv->p = NULL;
    pTail->p = pv;
    pTail = pv;
}
 
void GROUP::vPrintList()
{
    system("cls");
    cout << "Group list\n";
    STUDENT *pv = pHead;
    pv->vPrintStudent();
    while (pv->p!=NULL)
    {
        pv = pv->p;
        pv->vPrintStudent();
    }
    getch();
}
 
void GROUP::vSearchStudent(bool select)
{
    char number[name_length];
    char name[name_length];
    
    system("cls");
    STUDENT *pv = pHead;
    if (select)
    {
        cout <<"Enter the Last name of Student:";
        cin >> name;
        if (pv->bCompare(name)) pv->vPrintStudent();
        while (pv->p!=NULL)
        {
            pv = pv->p;
            if (pv->bCompare(name)) pv->vPrintStudent();
        }
    }
    else
    {
        cout << "Enter the phone number of Student";
        cin >> number[mobile_length];
        if (pv->bCompare(number)) pv->vPrintStudent();
        while (pv->p!=NULL)
        {
            pv = pv->p;
            if (pv->bCompare(number)) pv->vPrintStudent();
        }
    }
    system("cls");
    cout << "results:\n";
}
 
void STUDENT::vPrintStudent()
{
    cout << chFirstName[name_length] <<"  ";
    cout << chLastName[name_length] << "  ";
    cout << chMobileNumber[mobile_length] << "\n";
}
 
void STUDENT::vSetStudent()
{
    system("cls");
 
    cout << "\nEnter name of student:";
    cin >> chFirstName;
 
    cout << "\nEnter last Name of Student";
    cin >> chLastName;
 
    cout << "\nEnter mobile number of student";
    cin >> chMobileNumber;
}
 
bool STUDENT::bCompare(char str[name_length])
{
    if (!strcmp(str,chFirstName)) 
        return 1;
    else 
        return 0;
}
 
GROUP::~GROUP()
{
    STUDENT *temp = pHead;
    while (pHead->p!=NULL)
    {
            pHead = pHead->p;
            delete temp;
            temp = pHead;
    }
    cout << "\nThe memory is free";
}