Question

运行Eclipse，我正在编写程序来为类添加分数，所以它可能看起来非常不专业，但是这里。基本上我的理性名字无法解决，我不确定为什么。它与范围有关吗？我已经评论了错误发生的位置。

  package lab11tests;

    import java.util.Scanner;

    public class Tests {

    private static int num1 = 0;
    private static int den1 = 1;
    private static int num2 = 0;
    private static int den2 = 1;

        static Rational r1 = new Rational(num1,den1);
         static Rational r2 = new Rational(num2,den2);
         static Rational r3 = new Rational();



        public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
            System.out.print("Numerator 1: ");
            num1=input.nextInt();
            System.out.print("Denominator 1: ");
            den1=input.nextInt();
            System.out.print("Numerator 2: ");
            num2 = input.nextInt();
            System.out.print("Denominator 2: ");
            den2 = input.nextInt();

            System.out.println(r1.rational() + " + " + r2.rational() + " equals "+ r3.answer());
        }
    }
        class Rational {

        //  private int firstNum;
        //  private int firstDen;
            private int num;
            private int den;


            public Rational(int n, int d){

                num = n;
                den = d;

            }

            public Rational(){}

            public int getNum(){
                return num;
            }

            public int getDen(){
                return den;
            }

            public void add(){
                int commonDen = r1.getDen() * r2.getDen();`enter code here`
                this.num=(r1.getNum()*r2.getDen())+(r2.getNum()*r1.getDen()); //Errors are here, all r2 and r1's in the add method "cannot be resolved"
                this.den=commonDen;
            }



            public String rational(){
                return num + "/" + den;
            }

            public String answer(){
                return this.num + "/" + this.den;
            }

        }

Answer 1

Rational是一个单独的类，Tests类括号在定义Rational类

之前已经结束

理性无法解决？

1 个答案: