Initial commit.

.gitignore

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+# Ignore builds
+bin/

Makefile

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+# Copyright (C) 2017 Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net> All rights reserved.
+# Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+#
+# This software is provided 'as-is', without any express or implied
+# warranty. In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+#
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source
+#    distribution.
+
+# Compilers
+CC=gcc
+CXX=g++
+JAVAC=javac
+
+# Other commands
+RM=rm -rf
+
+# Directories
+BINDIR=bin
+
+all: c cpp java
+
+c:
+	mkdir -p $(BINDIR)
+	$(CC) src/main.c -o $(BINDIR)/doublesgame-c
+
+cpp:
+	mkdir -p $(BINDIR)
+	$(CXX) src/Main.cpp -o $(BINDIR)/doublesgame-cpp
+
+java:
+	mkdir -p $(BINDIR)
+	$(JAVAC) src/DoublesGame.java -d $(BINDIR)
+
+.PHONY: clean
+clean:
+	$(RM) $(BINDIR)

README.md

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+DoublesGame Collection
+======================
+This is a collection of sources in different languages for [DoublesGame](https://themusicinnoise.net/programs/doublesgame/). Feel free to contribute your own!
+
+Building
+--------
+There's a Makefile you can use to compile all of the sources or simply one of them. Be aware that you will need the compiler for each and the code may be platform/architecture specific depending on the language.
+
+Contributing
+------------
+Do you have another language? Found a bug? Make merge request or send me a patch at [deathsbreed@themusicinnoise.net](mailto:deathsbreed@themusicinnoise.net) and I'll see what I can do. Just make sure to specify a license and copyright statement at the top of the source file, only free software licenses are accepted.
+
+License
+-------
+Each file will contain the license given to it by each contributor.

src/DoublesGame.java

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+/*
+ * Copyright (C) 2017 Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net> All rights reserved.
+ * Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ *    distribution.
+ */
+
+import java.util.Scanner;
+
+public class DoublesGame {
+	private static Scanner in = new Scanner(System.in);
+
+	public static void main(String[] args) {
+		int n = 1;
+
+		while(true) {
+			System.out.print("2^" + n + "=");
+			int a = Integer.parseInt(in.nextLine());
+			if(a == 0) {
+				System.out.println("Goodbye!");
+				break;
+			} else if(a != 2 << (n - 1)) {
+				System.out.println("Wrong answer, try again.");
+			} else {
+				System.out.println("Correct!");
+				++n;
+			}
+		}
+	}
+}

src/Main.cpp

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+/*
+ * Copyright (C) 2017 Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net> All rights reserved.
+ * Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ *    distribution.
+ */
+
+#include <iostream>
+
+int main(void) {
+	unsigned int n = 1;
+
+	while(true) {
+		std::cout << "2^" << n << "=";
+		unsigned int a;
+		std::cin >> a;
+		if(a == 0) {
+			std::cout << "Goodbye!\n";
+			return 0;
+		} else if(a not_eq 2 << (n - 1)) {
+			std::cout << "Wrong answer, try again.\n";
+		} else {
+			std::cout << "Correct!\n";
+			++n;
+		}
+	}
+}

src/doublesgame.py

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+#!/usr/bin/python3
+
+# Copyright (C) 2017 Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net> All rights reserved.
+# Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+#
+# This software is provided 'as-is', without any express or implied
+# warranty. In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+#
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source
+#    distribution.
+
+import sys
+
+n = 1
+
+while True:
+    a = int(input("2^{number}=".format(number=n)))
+    if a is 0:
+        print("Goodbye!")
+        break
+    elif a is not 2 << (n - 1):
+        print("Wrong answer, try again.")
+    else:
+        print("Correct!")
+        n += 1

src/doublesgame.sh

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+#!/bin/bash
+
+# Copyright (C) 2017 Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net> All rights reserved.
+# Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+#
+# This software is provided 'as-is', without any express or implied
+# warranty. In no event will the authors be held liable for any damages
+# arising from the use of this software.
+#
+# Permission is granted to anyone to use this software for any purpose,
+# including commercial applications, and to alter it and redistribute it
+# freely, subject to the following restrictions:
+#
+# 1. The origin of this software must not be misrepresented; you must not
+#    claim that you wrote the original software. If you use this software
+#    in a product, an acknowledgment in the product documentation would be
+#    appreciated but is not required.
+#
+# 2. Altered source versions must be plainly marked as such, and must not be
+#    misrepresented as being the original software.
+#
+# 3. This notice may not be removed or altered from any source
+#    distribution.
+
+n=1
+
+while :
+do
+	printf "2^$n="
+	read a
+	if [ $a -eq 0 ]
+	then
+		echo "Goodbye!"
+		break
+	elif [ $a -ne $((2 << ($n - 1))) ]
+	then
+		echo "Wrong answer, try again."
+	else
+		echo "Correct!"
+		let n++
+	fi
+done

src/main.c

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+/*
+ * Copyright (C) 2017 Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net> All rights reserved.
+ * Author: Ortega Froysa, Nicolás <deathsbreed@themusicinnoise.net>
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software. If you use this software
+ *    in a product, an acknowledgment in the product documentation would be
+ *    appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ *    distribution.
+ */
+
+#include <stdio.h>
+
+int main(void) {
+	unsigned int n = 1;
+	while(1) {
+		printf("2^%u=", n);
+		unsigned int a;
+		scanf("%u", &a);
+		if(a == 0) {
+			printf("Goodbye!\n");
+			return 0;
+		} else if(a != 2 << (n - 1)) {
+			printf("Wrong answer, try again.\n");
+		} else {
+			printf("Correct!\n");
+			++n;
+		}
+	}
+}