init: gtest and quiz 1.

mixplus/main.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+#include <parser.h>
+
+int main(const int argc, const char** argv)
+{
+    try
+    {
+        const auto value = mixplus::Parser::parseAndAdd(argc, argv);
+
+        const auto result = mixplus::Parser::formatResult(value);
+
+        std::cout << result.hexadecimal << ' ' << result.digit << std::endl;
+    }
+    catch (std::invalid_argument& e)
+    {
+        std::cout << e.what() << std::endl;
+        std::cout << "ERROR" << std::endl;
+    }
+
+    return 0;
+}