// interp.cpp     Dave Reed      10/20/03
//
// This simple interpreter reads and executes SILLY programs.
// Currently, it handles assignments and output statements.
///////////////////////////////////////////////////////////////////////////////

#include <iostream>
#include <string>
#include "Token.h"
#include "Tokenizer.h"
#include "VarTable.h"
#include "Statement.h"
using namespace std;


int main()
{
	string filename;
	cout << "Enter the program file name: ";
	cin >> filename;
	
	Tokenizer program(filename);
	VarTable variables;

	Statement * stmt = Statement::GetNext(program);
	if (stmt == NULL || stmt->GetType() != BEGIN) {
		cout << "SYNTAX ERROR: missing begin" << endl;
		exit(0);
    }

	stmt = Statement::GetNext(program);
	while (stmt != NULL && stmt->GetType() != END) {
		stmt->Execute(variables);
		stmt = Statement::GetNext(program);
	}

	if (stmt == NULL || stmt->GetType() != END) {
		cout << "SYNTAX ERROR: missing end" << endl;
		exit(0);
	}

	return 0;
}