public static void Main(string[] args)
{
SimpleCalculator calculator = new SimpleCalculator();
String script = "int a = b + 3;";
Console.WriteLine("解析变量声明语句：" + script);
SimpleLexer lexer = new SimpleLexer();
ITokenReader tokens = lexer.tokenize(script);
try
{
SimpleASTNode node = calculator.intDeclare(tokens);
calculator.dumpAST(node, "");
}catch (Exception e)
{
Console.WriteLine(e.Message);
}
script = "2+3*5";
Console.WriteLine("\n计算：{0}", script);
calculator.evaluate(script);
script = "2+";
Console.WriteLine("\n计算：{0}", script);
calculator.evaluate(script);
script = "2+3+4*2+10+10/5";
Console.WriteLine("\n计算：{0}", script);
calculator.evaluate(script);
Console.ReadKey();
}
/*
* 解析脚本，并返回根节点
* @param code
*/
public IASTNode parse(string code)
{
SimpleLexer lexer = new SimpleLexer();
ITokenReader tokens = lexer.tokenize(code);
IASTNode rootNode = prog(tokens);
return(rootNode);
}