start gathering snippets into one library

examples/helloworld.c

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+/*
+ * This file is part of the usefull_macros project.
+ * Copyright 2018 Edward V. Emelianoff <eddy@sao.ru>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <usefull_macros.h>
+
+/**
+ * This is a simplest example of library usage: "blind" getchar
+ */
+
+int main(){
+    initial_setup();
+    // setup non-echo non-canonical mode
+    setup_con();
+    green("Press any key...\n");
+    char k = mygetchar();
+    red("You press %c\n", k);
+    // don't forget to restore @exit!
+    restore_console();
+    return 0;
+}