Compiling and Running a Program.

• In the end the program needs to run on a linux machine.
  • This is a requirement of the class.
  • You need to learn to do this.
• To do this I will need an account on a linux server
  • I would like you to use a machine called cslab103.cs.edinboro.edu
    • But you could also use cslab100.cs.edinboro.edu or cslab101.cs.edinboro.edu
  • These accounts are not yet set up.
    • I will provide details when they are.
• The first step is to transfer the program from your laptop to the server
  • I use winscp.
  • This is a file transfer program.
  • It performs many other tasks as well.
• Transfer the file via winscp.
• The next step is to compile your program.
  • Your program is written in a High Level programming language.
    • C++
    • But others as well.
    • These are easier for humans to understand.
    • But can not be run or executed by a computer.
    • They need to be translated into the machine language for the target computer.
  • Machine language
    • This is the language the computer can execute.
    • It is almost certainly a series of 0 or 1
    • It is NOT easy for a human to understand.
    • But it is easy for the computer.
  • A compiler is a program that translates from a high level language to a machine language.
    • The compiler we will use is called g++
  • To run the compiler, you will need to log into the server.
    • To do this we will use another program putty
    • This allows us to log into a remote computer and work on it.
    • Again, you will need credentials we do not yet have.
  • For now, to compile a program called game.cpp

    • g++ -o game game.cpp
                  

  • Two things could happen when you try to compile
    1. Most likely, a syntax error will occur
       • This means you didn't use the proper syntax (or grammar) for c++
       • The compiler will attempt to describe the error.
       • you need to fix it and try again.
       • (Edit, transfer, compile)
    2. Your program will compile
       • This will produce an executable file or executable program that can be run or executed on the computer.
       • In this case it will be called game
       • To run it type ./game
• We have seen the complete edit-compile-execute cycle
• We will continue to develop the program using these tools.