You will need a compiler and an IDE. A visual debugger is helpfull also.
Here you can download the IDE (with compiler):
***CLICK HERE TO START DOWNLOAD IDE***
And below you can download a visual debugger:
***CLICK HERE TO START DONLOADING DEBUGGER***
Install the IDE (DevCPP) first then the debugger.
Read
THIS (CLICK HERE)to find out about what you are downloading and how to use, etcetera.