[C++] Using cin to get user input

#include <iostream>
#include <string>
#include <sstream>
 
using namespace std;
 
int main() {
 
	string input = "";
 
	// How to get a string/sentence with spaces
	cout << "Please enter a valid sentence (with spaces):\n>";
	getline(cin, input);
	cout << "You entered: " << input << endl << endl;
 
	// How to get a number.
	int myNumber = 0;
 
	while (true) {
		cout << "Please enter a valid number: ";
		getline(cin, input);
 
		// This code converts from string to number safely.
		stringstream myStream(input);
		if (myStream >> myNumber)
			break;
		cout << "Invalid number, please try again" << endl;
	}
	cout << "You entered: " << myNumber << endl << endl;
 
	// How to get a single char.
	char myChar = { 0 };
 
	while (true) {
		cout << "Please enter 1 char: ";
		getline(cin, input);
 
		if (input.length() == 1) {
			myChar = input[0];
			break;
		}
 
		cout << "Invalid character, please try again" << endl;
	}
	cout << "You entered: " << myChar << endl << endl;
 
	cout << "All done. And without using the >> operator" << endl;
 
	return 0;
}