How to send .txt taken variables to class functions? [closed] - c++

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I need some help about class functions because whatever i tried gave me errors. I tried to create pointers which holds my main variables but still couldn't figure out even i read a lot of topics and watched videos about them. I have something wrong with my logic but can not find that actually. After i get my arrays i want to use them in class part. For example when i switch case to 0 i want to show all contacts. For that i have to carry my arrays into the class but i couldn't. I will use them for editing, adding persons or deleting them. So i need my counters too. As i said. If there is a way can someone please at least give an example for me? Thanks a lot.
#include <iostream>
#include <string>
#include <conio.h>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
void printline(char, int);
class person{
private:
int order;
string name;
string surname;
string phonenumber;
public:
void setName(string isim){
name=isim;
}
string getName(){
return name;
}
void setSurname(string soyad){
surname=soyad;
}
string getSurname(){
return surname;
}
void setPhonenumber(string numara){
phonenumber=numara;
}
string getPhonenumber(){
return phonenumber;
}
};
int main() {
person kisi;
FILE* myFile;
int i = 0;
int j = 0;
int k = 0;
int choice;
int mOrder;
char* mName[20],mSurname[20],mPhone[20];
myFile = fopen("phoneData.txt", "r");
if (myFile != NULL)
while (fscanf(myFile, "%d%s%s%s", &mOrder, mName, mSurname, mPhone) != EOF)
i++;
fclose(myFile);
// this is where we find i and now i can create my arrays.
int *orderArray;
char *nameArray[i];
char *SurnameArray[i];
char *PhoneArray[i];
orderArray = (int *) malloc(i * sizeof(int));
for (int n=0;n<i;n++)
{
nameArray[n] = (char*) malloc(20 * sizeof(char));
SurnameArray[n] = (char *) malloc(20 * sizeof(char));
PhoneArray[n] = (char *) malloc(20 * sizeof(char));
}
myFile = fopen("phoneData.txt", "r");
if (myFile == NULL)
{
printf("There is no file.\n");
}
else
{
int m=0;
while (fscanf(myFile, "%d%s%s%s", &orderArray[m], nameArray[m], SurnameArray[m], PhoneArray[m]) != EOF){
m++; //this is the part where we read the txt file correctly and seperate it into the parts.
}
fclose(myFile);
//i made this part just to see if my arrays work or not. They worked.
/*
for (int j=0;j<i;j++)
{
cout<<orderArray[j]<<" "<<nameArray[j]<<" " << SurnameArray[j]<<" "<<PhoneArray[j]<<endl;
}
*/
}
// menü burası olacak
/*
cout << "--- Welcome to the PhoneBook ---" << endl;
printline('-', 32);
cout << "0. Show all the contacts on PhoneBook" << endl;
cout << "1. Add a contact to PhoneBook" << endl;
cout << "2. Search a contact on PhoneBook" << endl;
cout << "3. Edit a contact on PhoneBook" << endl;
cout << "4. Delete a contact from PhoneBook\n" << endl;
cout << "Please make a choice: " << endl;
cin >> choice;
*/
//switch cases will be there.
/*
switch(choice){
case 0:
showContacts();
break;
case 1:
addContacts();
break;
case 2:
searchContacts();
break;
case 3:
editContacts();
break;
case 4:
deleteContacts();
break;
}
*/
return 0;
}
void printline(char ch, int size)
{
for(int i=0; i<size; i++)
cout << ch;
cout << "\n";
}

Answer 1

Please take this as one example of possible millions of other solutions.
I will edit the answer later and put explanations and comments. Now I nned to do other stuff
#include <iostream>
#include <fstream>
#include <sstream>
#include <algorithm>
#include <iterator>
#include <vector>
#include <string>
struct Person {
unsigned int index{};
std::string name{};
std::string surname{};
std::string phoneNumber{};
friend std::istream& operator >> (std::istream& is, Person& p) {
if (std::string line{}; std::getline(is, line)) {
std::istringstream iss{ line };
iss >> p.index >> p.name >> p.surname >> p.phoneNumber;
}
return is;
}
friend std::ostream& operator << (std::ostream& os, const Person& p) {
return os << p.index << '\t' << p.name << '\t' << p.surname << '\t' << p.phoneNumber;
}
};
struct PhoneBook {
std::vector<Person> persons{};
friend std::istream& operator >> (std::istream& is, PhoneBook& p) {
p.persons.clear();
std::copy(std::istream_iterator<Person>(is), {}, std::back_inserter(p.persons));
return is;
}
friend std::ostream& operator << (std::ostream& os, const PhoneBook& p) {
std::copy(p.persons.begin(), p.persons.end(), std::ostream_iterator<Person>(os, "\n"));
return os;
}
};
struct PhoneBookAdministration {
PhoneBook phoneBook{};
std::string phoneBookFileName{};
void load(const std::string& fileName) {
phoneBookFileName = fileName;
if (std::ifstream phoneBookFileStream(fileName); phoneBookFileStream)
phoneBookFileStream >> phoneBook;
else std::cerr << "\nError: Could not open " << fileName << "\n\n";
}
void saveAs() {
std::cout << "\n\nSave As\n\nPlease enter a filename:\n";
if (std::string fileName{}; std::cin >> fileName) {
phoneBookFileName = fileName;
save();
}
}
void save() const {
if (std::ofstream phoneBookFileStream(phoneBookFileName); phoneBookFileStream) {
phoneBookFileStream << phoneBook;
}
else std::cerr << "\nError: Could not open " << phoneBookFileName << "\n\n";
}
void show() const {
std::cout << "\n\nContents of phone book:\n" << phoneBook << "\n\n";
}
void addEntry() {
std::cout << "\n\nAdd entry to phone book\nEnter name, surname and phone number:\n";
if (std::string n{}, s{}, p{}; std::cin >> n >> s >> p)
phoneBook.persons.emplace_back(phoneBook.persons.size(), n, s, p);
}
void searchContact() const {
std::cout << "\n\nSearch entry in phone book\nEnter name to search for:\n";
if (std::string n{}; std::cin >> n) {
if (auto pos = std::find_if(phoneBook.persons.begin(), phoneBook.persons.end(), [&n](const Person& p) {return p.name == n; }); pos != phoneBook.persons.end())
std::cout << "\n\nPerson '" << n << "' found:\n" << *pos << '\n';
else std::cout << "\n\nPerson '" << n << "' not found\n";
}
}
void editContact() {
std::cout << "\n\nEdit contact. Here is the phone book\n" << phoneBook << "\n\nPlease enter the index of an entry:\n";
if (size_t index{}; std::cin >> index && index < phoneBook.persons.size()) {
std::cout << "\n\nEnter name, surname and phone number:\n";
if (std::string n{}, s{}, p{}; std::cin >> n >> s >> p)
phoneBook.persons[index] = { phoneBook.persons[index].index, n, s, p };
}
else std::cout << "\n\nError, problem with given index\n";
}
void deleteContact() {
std::cout << "\n\nDelete contact. Here is the phone book\n" << phoneBook << "\n\nPlease enter the index of an entry:\n";
if (size_t index{}; std::cin >> index && index < phoneBook.persons.size())
phoneBook.persons.erase(phoneBook.persons.begin() + index);
}
};
int main() {
PhoneBookAdministration pba{};
pba.load("r:\\pb.txt");
bool runProgram{ true };
while (runProgram) {
// Show menu
std::cout <<
"\n\n\nMain Menu\n"
"You have the follwing options:\n"
" 1 - Save\n"
" 2 - Save as\n"
" 3 - Show\n"
" 4 - Add Entry\n"
" 5 - Search\n"
" 6 - Edit entry\n"
" 7 - Delete entry\n"
" 0 - Exit program\n\n"
"Please select:\n";
if (int selection{}; std::cin >> selection) {
switch (selection) {
case 1:
pba.save();
break;
case 2:
pba.saveAs();
break;
case 3:
pba.show();
break;
case 4:
pba.addEntry();
break;
case 5:
pba.searchContact();
break;
case 6:
pba.editContact();
break;
case 7:
pba.deleteContact();
break;
case 0:
std::cout << "\n\nExiting . . .\n\n";
runProgram = false;
break;
default:
std::cout << "\n\nWrong selection. Please try again\n";
break;
}
}
else std::cerr << "\n\nError: Problem with selection\n";
}
return 0;
}