Print std::string various ways.

string_demo.cc

// For std::string
#include <string.h>
// For std::copy, std::for_each
#include <algorithm>
// For std::ostream_iterator
#include <iterator>
// For std::cin, std::cout
#include <iostream>
// For std::numeric_limits
#include <limits>

int main()
{
	char inputChar;

	std::string input;

	do
	{
		// Get input
		std::cout << "Type a string of text:" << std::endl;
		std::getline(std::cin, input);

		// Normal
		std::cout << "Printing forwards:" << std::endl;
		std::cout << input << std::endl;

		// Backwards
		std::cout << "Printing backwards:" << std::endl;
		std::copy(input.rbegin(), input.rend(), std::ostream_iterator<char>(std::cout));
		std::cout << std::endl;

		// Vertical
		std::cout << "Printing vertically:" << std::endl;
		std::for_each(input.begin(), input.end(), [](const char &c) {std::cout << c << std::endl;});

		// Triangle
		std::cout << "Printing as a triangle" << std::endl;
		for (std::size_t i = 0; i <= input.length(); i++) {
			for (auto c : input.substr(0, i)) {
				std::cout << c;
			}
			std::cout << std::endl;
		}

		// Length
		std::cout << "Length of string: " << input.length() << std::endl;

		// Again?
		std::cout << "Type another string? (y/N)" << std::endl;
		std::cin >> inputChar;
		std::cin.clear();
		std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
	} while (inputChar == 'y');

	return 0;
}