分数计算器应用程序

Question

public class Calculator 
{
    public static void main(String[] args)
    {
        String choice = "";
        String userFract = "0";
        String userFract2 = "0";
        Scanner scan = new Scanner(System.in);
        String fract = "0";
        int clearCounter = 0;

        String add = "a"; String multiply = "m";
        String subtract = "s"; String divide = "d";
        String reciprocal = "r"; String clear = "c";
        String reverse = "n"; String proper = "p";
        String improper = "i"; String quit = "q";



        while(!choice.equals("q"))
        {
            if(clearCounter == 0)
            {
                System.out.print("Enter a fraction: ");
                userFract = scan.nextLine();

               clearCounter++;
            }

            NewFraction currentFract = NewFraction.parseNewFraction(userFract);
            fract = currentFract.toString();
            System.out.println(fract);

            System.out.println("add:         a,  clear:            c");
            System.out.println("subtract:    s,  reverse sign:     n");
            System.out.println("multiply:    m,  proper display:   p");
            System.out.println("divide:      d,  improper display: i");
            System.out.println("reciprocal:  r,  quit:             q");
            System.out.print("-->");
            choice = scan.nextLine();
            System.out.println("");

            if(choice.equals(add))
            {
                System.out.print("Enter another fraction: ");
                userFract2 = scan.nextLine();
                NewFraction newFract = NewFraction.parseNewFraction(userFract2);

               NewFraction Fract = currentFract.Add(newFract);
               System.out.println(Fract.Proper());
            }

            if(choice.equals(clear))
            {
                clearCounter--;
            }

          }


    }
}

我正在开发一个分数计算器的程序，就像我的NewFraction文件正常工作但我遇到计算器文件有问题。所以我的文件编译并执行但输出很奇怪。它取代了正确的答案，在下一行，它还显示原始分数？ Idk该怎么做..帮助！

Answer 1

您需要替换此行

System.out.println(Fract.Proper());

带

currentFract = Fract;

分数Fract将在循环的下一次迭代开始时打印出来。