programming_language/myrpal.java at main · KevithMannage/programming_language · GitHub

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 import Engine.Evaluvator;

public class myrpal {

    public static void main(String[] args) {
        String fn;
        boolean isPrintAST=false,isPrintST=false;
        if(args.length==0){
            fn = "input.txt";
            isPrintAST = true;
            isPrintST = true;
        }
        else if(args.length==3 && (
                                    (args[0].equalsIgnoreCase("-ast") && args[1].equalsIgnoreCase("-st")) ||
                                    (args[0].equalsIgnoreCase("-st") && args[1].equalsIgnoreCase("-ast"))
                                    )
                )
        {
            fn = args[2];
            isPrintAST=true;
            isPrintST=true;
        }
        else if(args.length==2){
            fn=args[1];
            if(args[0].equalsIgnoreCase("-ast")){
                isPrintAST=true;
            }
            else if(args[0].equalsIgnoreCase("-st")){
                isPrintST=true;
            }
            else{
                System.out.println("Invalid Arguments Passing!");
                return;
            }
        }
        else if(args.length==1){
            fn = args[0];
        }
        else{
            System.out.println("Invalid Arguments Passing!");
            return;
        }
        System.out.println(Evaluvator.evaluvate(fn,isPrintAST,isPrintST));                                   // get and print the answer


    }
}