feat(EditorConfig): Add .editorconfig files

01/src/CMakeLists.txt

@@ -0,0 +1,17 @@
+
+# Make an explicit list of all source files in `CMakeDemo_SRC`. This is important
+# because CMake is not a build system: it is a build system generator. Suppose
+# you add a file foo.cpp to src/ after running cmake .. . If you set
+# `CMakeDemo_SRC` with `file(GLOB ... )`, this is not passed to the makefile;
+# the makefile doesn't know that foo.cpp exists and will not re-run cmake. Your
+# collaborator's builds will fail and it will be unclear why. Whether you use
+# file(GLOB ...) or not, you will need to re-run cmake, but with an explicit
+# file list, you know beforehand why your code isn't compiling.
+set(SRC
+    main.c
+    )
+
+# Form the full path to the source files...
+PREPEND(SRC)
+# ... and pass the variable to the parent scope.
+set(SRC ${SRC}  PARENT_SCOPE)

01/src/main.c

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+/**
+ * Copyright [2023] Jiří Štefka <jiriks74>
+ * Project: AdventOfCode
+ * @file main.c
+ * @brief Main entry point
+ * @author jiriks74
+ */
+
+#include <stdio.h>
+
+/**
+ * @brief Main entry point
+ * @param argc Number of command-line arguments.
+ * @param argv Array of command-line arguments.
+ */
+#ifndef TESTING
+int main(int argc, char *argv[])
+#endif
+#ifdef TESTING
+    int main_test(int argc, char *argv[])
+#endif
+{
+  printf("Hello world!\n");
+  return 0;
+}