simple address Phone in C++

addressPhone.cpp

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

int counter = 0;

void insert(string names[], string phoneNumbers[], string name, string number) {
	names[counter] = name;
	phoneNumbers[counter] = number;
	counter += 1;
}

void display(string names[], string phoneNumbers[]) {
	if (counter == 0) {
		cout << "Empty array!";
		return;
	}
	for (int i = 0; i < counter; i++) {
		cout << i + 1 << "_ " << names[i] << ": " << phoneNumbers[i] << endl;
	}
}

string search(string names[], string phoneNumbers[], string name) {

	for (int i = 0; i < counter; i++)
		if (names[i] == name)
			return phoneNumbers[i];

	return "not found";
}

void remove(string names[], string phoneNumbers[], string name) {
	for (int i = 0; i < counter; i++)
		if (names[i] == name) {
			for (i; i < counter; i++) {
				names[i] = names[i + 1];
				phoneNumbers[i] = phoneNumbers[i + 1];
			}
			cout << name << " deleted\n";
			counter -= 1;
		}
		else {
			cout << "name not found!\n";
		}
}

void main() {
	string names[100]; // Local var worked!
	string phoneNumbers[100];
	string name, number;
	int choose;

	while (true) {
		system("cls");
		cout << "1. Insert \n"
			<< "2. Dispaly \n"
			<< "3. Search \n"
			<< "4. Remove \n"
			<< "5. Exit \n"
			<< "=> ";
		cin >> choose;
		switch (choose) {
		case 1:
			system("cls");
			cout << "Enter name: ";
			cin >> name;
			cout << "Enter phoneNumber: ";
			cin >> number;
			insert(names, phoneNumbers, name, number);
			cout << name << " added\n";
			system("pause");
			break;
		case 2:
			system("cls");
			display(names, phoneNumbers);
			system("pause");
			break;
		case 3:
			system("cls");
			cout << "Search name: ";
			cin >> name;
			cout << search(names, phoneNumbers, name) << endl;
			system("pause");
			break;
		case 4:
			system("cls");
			cout << "Remove name: ";
			cin >> name;
			remove(names, phoneNumbers, name);
			system("pause");
			break;
		case 5:
			return;
		default:
			cout << "invalid input \n";
			system("pause");
			break;
		}
	}
}