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Thread: Creating an Interpreter?

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    Post Creating an Interpreter?

    I was given an assignment to create an interpreter which will read whatever the user types in and then take that and compile it into java and then print that out to the counsle. I have no idea where to start and this project is do next week. Any ideas on how to get started?


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    Default Re: Creating an Interpreter?

    If you can, you can create a new Java file, then invoke the javac compiler If you want a true interpreter, that will be a bit more difficult (well, bit is an understatement). I would recommend using a Compiler compiler if you're allowed Otherwise, you'll probably want to implement something like the Shunting Yard Algorithm to get expressions into post-fix notation, then use an interpreter to execute the Java commands one-by-one. I'm working on one right now (well, kind of, it's on hold while I work on my classwork).

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    Super Moderator Norm's Avatar
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    Default Re: Creating an Interpreter?

    Creating a java file and calling the compiler sounds like what an editor does. But if your assignment is more than that, there is no way one person could do it in a few days.

    Can you post some more details on what you are to do?
    What can a user try in for example?
    Compile that to java? Is there a higher level language that your program "compiles" into java source?

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    Default Re: Creating an Interpreter?

    Looks more like a code generator assignment to me.

    db

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    Default Re: Creating an Interpreter?

    basically this is the assignment and scoring requirements:

    Objective:
    Create an interpreter. Your interpreter should ask you for one instuction at a time. If the instruction is "end" the interpreter should finish and print the entire program in Java with tabs.

    Example:
    int x
    set x = 4
    print "value is " + 4
    if x ==4
    print "neat"
    else
    print "not neat"
    end if end

    user can input strings until the string end is entered. Program reads the first word of a string and determines what to do next. Program saves each string (motified if needed) in a dynamic array. Dynamic array will re size by one cell each time a new instruction is added.

    types of instructions:
    print
    set
    end
    while
    if
    else
    end if
    end while
    int
    double
    String
    boolean
    char

    Any ideas at all where to start?

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