The app has two executables: a client and a server.
The server executes the math operations while the client interacts with the user.
The server has one parameter: the port number, if it is not given the server assume the default port number.
Given a wrong port number to the server alerts the user and close the application with an error code.
Server.exe 55000 (assign 55000 as the port number for the server)
The client has two parameters: the ip address and the port number of the server.
If both parameters are missing the client uses the default parameters; if only the port number is missing the client uses the default port number.
If the ip address is not a valid ip address the client uses the default ip address, if the port number is not a valid port number the client uses the default port number.
Client.exe 127.0.0.1 55000 (connect with the server on the 55000 port at 127.0.0.1) or
Client.exe 127.0.0.1 (connect with the server on the default port at 127.0.0.1).
The calculator accepts only integer number and return an integer (or an error),
the command for the operations is: [operation char] [integer] [integer].
The possible operation are: ‘+’ (addition), ‘–‘ (subtraction), ‘x’ (multiplication) and ‘/’ (division).
eg. + 1 1 = 1 + 1.
If the client cannot send/receive from the server for 3 or more times the client shutdown the connection.