Console Input

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ConsoleInput1.cpp

/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#include "Utils.hpp"
#include <clocale>
#include <codecvt>
#include <fmt/format.h>
#include <fmt/xchar.h>
#include <iostream>
#include <string>

std::locale utf8loc(std::locale(), new std::codecvt_utf8<wchar_t>);
using namespace std;

int main(int argc, char **argv) {
	setlocale(LC_ALL, "en_US.UTF-8");
	wcout.imbue(utf8loc);
	wcin.imbue(utf8loc);

	wstring name;
	name = Utils::prompt(L"What is your name? ");
	wstring favoriteColor;
	favoriteColor = Utils::prompt(L"What is your favorite color? ");
	wcout << fmt::format(L"Hello, {0:s}!  I like {1:s} too!", name, favoriteColor) << endl;
	return 0;
}

ConsoleInput2.cpp

/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#include "Utils.hpp"
#include <clocale>
#include <codecvt>
#include <fmt/format.h>
#include <fmt/xchar.h>
#include <iostream>
#include <string>

std::locale utf8loc(std::locale(), new std::codecvt_utf8<wchar_t>);
using namespace std;

int main(int argc, char **argv) {
	setlocale(LC_ALL, "en_US.UTF-8");
	wcout.imbue(utf8loc);
	wcin.imbue(utf8loc);

	try {
		int favoriteInt;
		long favoriteLong;
		double favoriteDouble;
		wstring favoriteIntInput;
		favoriteIntInput = Utils::prompt(L"What is your favorite small integer? ");
		favoriteInt = stoi(favoriteIntInput);
		wstring favoriteLongInput;
		favoriteLongInput = Utils::prompt(L"What is your favorite large integer? ");
		favoriteLong = stol(favoriteLongInput);
		wstring favoriteDoubleInput;
		favoriteDoubleInput = Utils::prompt(L"What is your favorite floating point? ");
		favoriteDouble = stod(favoriteDoubleInput);
		double const sum = favoriteInt + favoriteLong + favoriteDouble;
		wcout << fmt::format(L"All together they add up to {0:f}!", sum) << endl;
	} catch (invalid_argument ex) {
		wcout << L"Bad input! " + Utils::exceptionMessage<wchar_t>(ex) << endl;
	} catch (exception ex) {
		wcout << L"Don't know what went wrong!" << endl;
	}
	return 0;
}

Questions

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References

[[C++ Programming Language]], 4th Edition, Bjarne Stroustrup, Addison-Wesley, 2013, ISBN 978-0321563842.
• [[C++ Language Reference]]
• [[cplusplus.com]]
• [[Cprogramming.com]]