Updated Minimum CMake Version and Added README

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.0)
 project(NameSort C)
 
 set(CMAKE_C_STANDARD 11)

README.md

@@ -0,0 +1,52 @@
+# NameSort
+This program is designed to take as input a txt file containing a list of names, separated by line breaks, and sorts 
+them first by length and then alphabetically.
+
+As this program is written in pure C (C11 to be exact) with a CMake build script, you will require a C Compiler and 
+CMake to build it. The program doesn't, however, rely on any external libraries aside from the C Standard Library 
+available with all C Compilers, so that is all that is required.
+
+# Unix Build 
+If you are on a Unix-based system, your system's cc/gcc compiler should be enough to build the program. Make sure you 
+have build tools and cmake installed. Create a 'build' directory, cd into it using the shell of your choice, then 
+invoke cmake, and finally invoke make.
+
+mkdir build
+cd build
+cmake ../
+make
+
+After you have built the program, you can run it from the build directory or move it to a location of your choice.
+The program needs the file to sort passed to it. I have included a copy of the 'Sort Me.txt' test file within the 
+'sandbox' folder of the project, for testing purposes. To test the program on it, simply run the following commands 
+from within the build directory:
+
+./NameSort "../sandbox/Sort Me.txt"
+
+# Windows Build
+
+If you are on Windows, you will require Visual Studio 2017 or later, as this project
+does use CMake and, unless you want to use the CMake custom tools, Visual Studio did not have support for CMake 
+before this version.
+
+To build the project, just open Visual Studio, and choose Open->CMake from the file menu. Navigate to the project 
+folder, and select the CMakeLists.txt file. The project should open in Visual Studio and, after a bit of indexing, 
+settle. Once indexed, change the run configuration to NameSort. It may initially say "Select Startup Item".
+
+Once selected, use the Build menu and select "Build". The project should Build successfully. 
+
+Unfortunately, Visual Studio still does not support setting run configurations for Cmake project, so there is no way
+to run the program successfully and pass it the file. Instead, you will have to open Command Prompt or Powershell
+and run the program the hard way. 
+
+The default configuration will have placed the built exe in the following folder:
+
+"C:\Users\<UserName>\CMakeBuilds\<UUID OF Project>\build\x64-Debug (default)"
+
+Navigate to this folder and open a command prompt/powershell, or navigate to it directly from within the shell. I also
+recommend copying the "Sort Me.txt" file into this directory, so you don't have to pass a very long path name to the 
+program.
+
+To run the program, it will be almost the same as on Unix:
+
+./NameSort.exe "./Sort Me.txt"