#include <iostream>
#include <cstring>
using namespace std;

struct pBook
{
    char name[100];
    char surname[100];
    char adress[100];
    char pNumber[100];
}*PhoneBook;

void init(pBook *a, int &size);
void addData(pBook*a, int size);
pBook* add(pBook *a, int &size);
void showFriendList(pBook *a, int size);

void main()
{
    int size = 1;
    PhoneBook = new pBook[size];
    init(PhoneBook, size);
    cout << "Your frined list." << endl << endl;
    showFriendList(PhoneBook, size);
    cout << "nnInfo about Oksana." << endl << endl;
    aboutOksana(PhoneBook, size);
    delete[]PhoneBook;
    cin.get();
    cin.get();
}

void init(pBook *a, int &size)
{
    char s;
    do {
        addData(a, size);
        cout << "Wanna add new friend?ny/nn";
        cin >> s;
        cin.ignore();
        if (s == 'y') a = add(a, size);
    } while (s == 'y');
}

void addData(pBook*a, int size)
{
    cout << "Enter name: ";
    gets_s(a[size - 1].name, 100);
    cout << "Enter surname: ";
    gets_s(a[size - 1].surname, 100);
    cout << "Enter adress: ";
    gets_s(a[size - 1].adress, 100);
    cout << "Enter phone-number: ";
    gets_s(a[size - 1].pNumber, 100);
}

pBook* add(pBook *a, int &size)
{
    pBook *temp = new pBook[size];
    for (int i = 0; i < size; ++i) {
        strcpy_s(temp[i].name, strlen(a[i].name) + 1, a[i].name);
        strcpy_s(temp[i].surname, strlen(a[i].surname) + 1, a[i].surname);
        strcpy_s(temp[i].adress, strlen(a[i].adress) + 1, a[i].adress);
        strcpy_s(temp[i].pNumber, strlen(a[i].pNumber) + 1, a[i].pNumber);
    }
    delete[]a;
    size++;
    a = new pBook[size];
    for (int i = 0; i < size - 1; ++i) {
        strcpy_s(a[i].name, strlen(temp[i].name) + 1, temp[i].name);
        strcpy_s(a[i].surname, strlen(temp[i].surname) + 1, temp[i].surname);
        strcpy_s(a[i].adress, strlen(temp[i].adress) + 1, temp[i].adress);
        strcpy_s(a[i].pNumber, strlen(temp[i].pNumber) + 1, temp[i].pNumber);
    }
    delete[]temp;
    return a;
}

void showFriendList(pBook *a, int size)
{
    for (int i = 0; i < size; ++i) {
        cout << i + 1 << ". ";
        cout << "Name = " << a[i].name << endl;
        cout << "Surname = " << a[i].surname << endl;
        cout << "Adress = " << a[i].adress << endl;
        cout << "Phone-number = " << a[i].pNumber << endl;
        cout << endl;
    }
}

#include <iostream>
#include <cstring>
using namespace std;

struct pBook
{
    char name[100];
    char surname[100];
    char adress[100];
    char pNumber[100];
}*PhoneBook;

pBook* init(pBook *a, int &size);
pBook* addData(pBook*a, int size);
pBook* add(pBook *a, int &size);
void showFriendList(pBook *a, int size);
void aboutOksana(pBook *a, int size);

void main()
{
    int size = 1;
    PhoneBook = new pBook[size];
    PhoneBook = init(PhoneBook, size);
    cout << "Your frined list." << endl << endl;
    showFriendList(PhoneBook, size);
    cout << "nnInfo about Oksana." << endl << endl;
    aboutOksana(PhoneBook, size);
    delete[]PhoneBook;
    cin.get();
    cin.get();
}

pBook* init(pBook *a, int &size)
{
    char s;
    do {
        a = addData(a, size);
        cout << "Wanna add new friend?ny/nn";
        cin >> s;
        cin.ignore();
        if (s == 'y') a = add(a, size);
    } while (s == 'y');
    return a;
}

pBook* addData(pBook*a, int size)
{
    cout << "Enter name: ";
    gets_s(a[size - 1].name, 100);
    cout << "Enter surname: ";
    gets_s(a[size - 1].surname, 100);
    cout << "Enter adress: ";
    gets_s(a[size - 1].adress, 100);
    cout << "Enter phone-number: ";
    gets_s(a[size - 1].pNumber, 100);
    return a;
}

pBook* add(pBook *a, int &size)
{
    pBook *temp = new pBook[size];
    for (int i = 0; i < size; ++i) {
        strcpy_s(temp[i].name, strlen(a[i].name) + 1, a[i].name);
        strcpy_s(temp[i].surname, strlen(a[i].surname) + 1, a[i].surname);
        strcpy_s(temp[i].adress, strlen(a[i].adress) + 1, a[i].adress);
        strcpy_s(temp[i].pNumber, strlen(a[i].pNumber) + 1, a[i].pNumber);
    }
    delete[]a;
    size++;
    a = new pBook[size];
    for (int i = 0; i < size - 1; ++i) {
        strcpy_s(a[i].name, strlen(temp[i].name) + 1, temp[i].name);
        strcpy_s(a[i].surname, strlen(temp[i].surname) + 1, temp[i].surname);
        strcpy_s(a[i].adress, strlen(temp[i].adress) + 1, temp[i].adress);
        strcpy_s(a[i].pNumber, strlen(temp[i].pNumber) + 1, temp[i].pNumber);
    }
    delete[]temp;
    return a;
}

void showFriendList(pBook *a, int size)
{
    for (int i = 0; i < size; ++i) {
        cout << i + 1 << ". ";
        cout << "Name = " << a[i].name << endl;
        cout << "Surname = " << a[i].surname << endl;
        cout << "Adress = " << a[i].adress << endl;
        cout << "Phone-number = " << a[i].pNumber << endl;
        cout << endl;
    }
}

void aboutOksana(pBook *a, int size)
{
    for (int i = 0; i < size; ++i) {
        if (strcmp(a[i].name, "Oksana") == 0) {
            cout << "Info about " << a[i].name << " " << a[i].surname << endl;
            cout << "Name = " << a[i].name << endl;
            cout << "Surname = " << a[i].surname << endl;
            cout << "Adress = " << a[i].adress << endl;
            cout << "Phone-number = " << a[i].pNumber << endl;
            cout << endl;
        }
    }
}

#include <iostream>
#include <cstring>
using namespace std;

struct pBook
{
    char name   [100];
    char surname[100];
    char adress [100];
    char pNumber[100];
};

void   fill(pBook*&a,    int &size);
void   addData(pBook*&a, int &size);
void   showFriendList(pBook *a, int size);

int main()
{
    pBook* PhoneBook     = nullptr;
    int    PhoneBookSize = 0;
    fill(PhoneBook, PhoneBookSize);
    cout << "Your frined list." << endl << endl;
    showFriendList(PhoneBook, PhoneBookSize);
    //cout << "nnInfo about Oksana." << endl << endl;
    //aboutOksana(PhoneBook, size);
    delete[] PhoneBook;
    cin.get();
}

void fill(pBook*&a, int &size)
{
    for(char s = 'y'; s == 'y'; (cin >> s).ignore())
    {
        addData(a,size);
        cout << "Wanna add new friend?ny/nn";
    };
}

void readString(const char * prompt, char * field, int size = 100)
{
    cout << "Enter " << prompt << ": ";
    gets_s(field, size);
}

void addData(pBook*&a, int& size)
{
    pBook *temp = new pBook[size+1];
    if (a) memcpy(temp,a,sizeof(pBook)*size);
    delete[] a;
    a = temp;

    readString("name",        a[size].name);
    readString("surname",     a[size].surname);
    readString("address",     a[size].adress);
    readString("phone-number",a[size].pNumber);

    ++size;
}


void showFriendList(pBook *a, int size)
{
    for (int i = 0; i < size; ++i) {
        cout << i + 1 << ". ";
        cout << "Name = " << a[i].name << endl;
        cout << "Surname = " << a[i].surname << endl;
        cout << "Adress = " << a[i].adress << endl;
        cout << "Phone-number = " << a[i].pNumber << endl;
        cout << endl;
    }
}