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learnCPP/learncpp.com/Chapter2/chars.cpp

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+#include <iostream>
+
+int main()
+{
+	std::cout << "Please enter \"y\" or \"n\": ";
+	char choice{};
+	std::cin >> choice;
+	if (static_cast<int16_t>(choice) == 121) {
+		std::cout << "You've selected Yes!!" << "\n";
+	} else if (static_cast<int16_t>(choice) == 110) {
+		std::cout << "You've selected No!!" << "\n";
+	} else {
+		std::cout << "Damit.. You didn't follow directions..!" << "\n";
+	}
+	std::cout << "Please insert any letter from alphabet: ";
+	char userInput{};
+	std::cin >> userInput;
+	std::cout << "the letter " << userInput << " translates to " << static_cast<int16_t>(userInput) << " in ASCII!" << "\n";
+	return 0;
+}

learnCPP/learncpp.com/Chapter2/const.cpp

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+#include <iostream>
+#include "constants.h"
+
+int main()
+{
+	constexpr int16_t myBirthday{7}; // constant resolved during compile-time
+	std::cout << "My birthday is on the: " << myBirthday << "th!" << "\n";
+	std::cout << "What day is your birthday?: ";
+	int16_t x{};
+	std::cin >> x;
+	const int16_t z{x}; // constant resolved during run-time
+	std::cout << "My birthday is on the: " << z << "th!" << "\n";
+	if (z == myBirthday) {
+		std::cout << "You have the same birthday as me!! \n";
+	} else {
+		std::cout << "You're definitely not as cool as me...\n";
+	}
+	std::cout << "Sonja's birthday is on the " << constants::sonjaBirthday << "\n";
+	return 0;
+}

learnCPP/learncpp.com/Chapter2/constants.h

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+#ifndef CONSTANTS_H
+#define CONSTANTS_H
+
+namespace constants {
+	const double pi(3.14159);
+	const int16_t sonjaBirthday{25};
+}
+#endif