calculator.java

来自「中山大学编译原理课程的一个实验」· Java 代码 · 共 24 行

/*
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package parser;
import exceptions.*;
import java.io.IOException;
/**
 *
 * @author Beeven
 */
public class Calculator {
    public double calculate(String expr) throws ExpressionException
    {
        parser p = new parser(expr);
        try {
            return p.parse();
        } catch (IOException ex) {
            throw new ExpressionException();
        }
    }
}