20150401 作业2 结对 四则运算(Doing)

import java.util.ArrayList;
import java.util.Random;
import java.util.Scanner;

public class SE2_1 {// Software Engineering 軟件工程 作業2
    public RN getAnswer(RN[] Operand, String[] AS) {
        ArrayList<String> A = new ArrayList<String>();
        ArrayList<RN> O = new ArrayList<RN>();
        RN temp = new RN();
        temp.setSign(0);
        System.out.println();
        for (String as : AS){
            A.add(as);
            System.out.print(as+"  ");
        }
        System.out.println();
        for (RN op : Operand) {
            O.add(op);
            System.out.print(op.getNumber()+"  ");
        }
        System.out.println();
        while (A.get(0) != "=") {
            if (A.contains("×") || A.contains("÷")) {
                if (((A.contains("×") ^ A.contains("÷")) == true ? (A
                        .contains("×") == true ? true : false) : (A
                        .indexOf("×") < A.indexOf("÷") ? true : false))) {
                    int index = A.indexOf("×");
                    System.out.print(index + " × ");
                    System.out.println(O.get(index).getNumber()
                            + "*"
                            + O.get(index + 1).getNumber()
                            + "="
                            + (O.get(index).getNumber() * O.get(index + 1)
                                    .getNumber()));
                    temp.setDecimal((O.get(index).getNumber()
                            * O.get(index + 1).getNumber()));
                    O.set(index, temp);
                    System.out.println("here set " + O.get(index).getNumber() +" at " +index);
                    System.out.println("here remove " + O.get(index+1).getNumber()+" from "+(index+1)+" and remove "+ A.get(index)+" from "+index);
                    O.remove(index + 1);
                    A.remove(index);
                } else {
                    int index = A.indexOf("÷");
                    System.out.print(index + " ÷ ");
                    System.out.println(O.get(index).getNumber()
                            + "/"
                            + O.get(index + 1).getNumber()
                            + "="
                            + (O.get(index).getNumber() / O.get(index + 1)
                                    .getNumber()));
                    temp.setDecimal((O.get(index).getNumber()
                            / O.get(index + 1).getNumber()));
                    O.set(index, temp);
                    System.out.println("here set " + O.get(index).getNumber() +" at " +index);
                    System.out.println("here remove " + O.get(index+1).getNumber()+" from "+(index+1)+" and remove "+ A.get(index)+" from "+index);
                    O.remove(index + 1);
                    A.remove(index);
                }
            } else if (A.contains("＋") || A.contains("－")) {
                if (((A.contains("＋") ^ A.contains("－")) == true ? (A
                        .contains("＋") == true ? true : false) : (A
                        .indexOf("＋") < A.indexOf("－") ? true : false))) {
                    int index = A.indexOf("＋");
                    System.out.print(index + " ＋ ");
                    System.out.println(O.get(index).getNumber()
                            + "+"
                            + O.get(index + 1).getNumber()
                            + "="
                            + (O.get(index).getNumber() + O.get(index + 1)
                                    .getNumber()));
                    temp.setDecimal((O.get(index).getNumber()
                            + O.get(index + 1).getNumber()));
                    O.set(index, temp);
                    System.out.println("here set " + O.get(index).getNumber() +" at " +index);
                    System.out.println("here remove " + O.get(index+1).getNumber()+" from "+(index+1)+" and remove "+ A.get(index)+" from "+index);
                    O.remove(index + 1);
                    A.remove(index);
                } else {
                    int index = A.indexOf("－");
                    System.out.print(index + " － ");
                    System.out.println(O.get(index).getNumber()
                            + "-"
                            + O.get(index + 1).getNumber()
                            + "="
                            + (O.get(index).getNumber() - O.get(index + 1)
                                    .getNumber()));
                    temp.setDecimal((O.get(index).getNumber()
                            - O.get(index + 1).getNumber()));
                    O.set(index, temp);
                    System.out.println("here set " + O.get(index).getNumber() +" at " +index);
                    System.out.println("here remove " + O.get(index+1).getNumber()+" from "+(index+1)+" and remove "+ A.get(index)+" from "+index);
                    O.remove(index + 1);
                    A.remove(index);
                }
            }
            // if (A.contains("×")) {
            // int index = A.indexOf("×");
            // System.out.print(index + " × ");
            // System.out.println(O.get(index).getNumber() + "*"
            // + O.get(index + 1).getNumber() + "="
            // + O.get(index).getNumber()
            // * O.get(index + 1).getNumber());
            // temp.setDecimal(O.get(index).getNumber()
            // * O.get(index + 1).getNumber());
            // temp.setSign(0);
            // O.set(index, temp);
            // O.remove(index + 1);
            // A.remove(index);
            // } else if (A.contains("÷")) {
            // int index = A.indexOf("÷");
            // System.out.print(index + " ÷ ");
            // System.out.println(O.get(index).getNumber() + "/"
            // + O.get(index + 1).getNumber() + "="
            // + O.get(index).getNumber()
            // / O.get(index + 1).getNumber());
            // temp.setDecimal(O.get(index).getNumber()
            // / O.get(index + 1).getNumber());
            // temp.setSign(0);
            // O.set(index, temp);
            // O.remove(index + 1);
            // A.remove(index);
            // }
            // else if (A.contains("＋")) {
            // int index = A.indexOf("＋");
            // System.out.print(index + " ＋ ");
            // System.out.println(O.get(index).getNumber() + "+"
            // + O.get(index + 1).getNumber() + "="
            // + O.get(index).getNumber()
            // + O.get(index + 1).getNumber());
            // temp.setDecimal(O.get(index).getNumber()
            // + O.get(index + 1).getNumber());
            // temp.setSign(0);
            // O.set(index, temp);
            // O.remove(index + 1);
            // A.remove(index);
            // } else if (A.contains("－")) {
            // int index = A.indexOf("－");
            // System.out.print(index + " － ");
            // System.out.println(O.get(index).getNumber()
            // + "-"
            // + O.get(index + 1).getNumber()
            // + "="
            // + (O.get(index).getNumber() - O.get(index + 1)
            // .getNumber()));
            // temp.setDecimal(O.get(index).getNumber()
            // - O.get(index + 1).getNumber());
            // temp.setSign(0);
            // O.set(index, temp);
            // O.remove(index + 1);
            // A.remove(index);
            // }
            else
                System.out.println("error!!");
            O.trimToSize();
            A.trimToSize();
        }
        return O.get(0);
    }

    public RN GA(int number) {// Generation algorithm 生成算式
        RN[] Operand = new RN[number];
        String[] AS = new String[number];
        AS[number - 1] = "=";
        for (int i = 0; i < number; i++) {// 生成 number 个操作数
            Operand[i] = new RN();
            switch (new Random().nextInt(2) + 1) {// 這裏設置了Int(2)+1略過 小數
            // ifInt(3)就會出現小數
            case 0:// 小数[0~1.0) *100
                Operand[i]
                        .setDecimal(((int) (new Random().nextDouble() * 9900)) / 100.0 + 1);
                Operand[i].setSign(0);

                break;
            case 1:// 整数[0~n)
                Operand[i].setInteger(new Random().nextInt(99) + 1);
                Operand[i].setSign(1);
                break;
            case 2:// 分数
                Operand[i].setMolecular(new Random().nextInt(99) + 1);
                Operand[i].setDenominator(new Random().nextInt(99) + 1);
                Operand[i].setSign(2);
                break;
            default:
                System.exit(0);
            }
            if (i > 0)
                switch (new Random().nextInt(4)) {
                case 0:
                    AS[i - 1] = "＋";
                    // Answer += Operand[i].getNumber();// 答案有待修改
                    break;
                case 1:
                    AS[i - 1] = "－";
                    // Answer -= Operand[i].getNumber();
                    break;
                case 2:
                    AS[i - 1] = "×";
                    // Answer *= Operand[i].getNumber();
                    break;
                case 3:
                    AS[i - 1] = "÷";
                    // Answer /= Operand[i].getNumber();
                    break;
                default:
                    System.exit(0);
                }
            // if (new Random().nextBoolean())
            // Operand[i] *= -1;
        }

        for (int i = 0; i < number; i++)
            System.out.print(Operand[i].toString() + " " + AS[i] + " ");
        return getAnswer(Operand, AS);// !!
    }

    public static void main(String[] args) {
        SE2_1 test = new SE2_1();
        Scanner in = new Scanner(System.in);
        int count = 0;
        int Num;
        do {
            System.out.println("請輸入出題的個數(不超過5):");
            Num = in.nextInt();
        } while ((Num > 5 || Num < 1) ? true : false);
        for (int i = 0; i < Num; i++) {
            RN Answer = test.GA(new Random().nextInt(4) + 2);// 确定操作数个数 1~5
            // 个RN Answer =
            System.out.println("Answer is:" + Answer.getNumber());
            double Input = in.nextDouble();
            if (Input == Answer.getNumber()
                    || Input == Math.round(Answer.getNumber() * 100) / 100.0) {
                System.out.println("答對了!");
                count++;
            } else
                System.out.println("答錯了!答案爲:"
                        + Math.round(Answer.getNumber() * 100) / 100.0);
        }
        System.out
                .println("一共" + Num + "道題,答對了" + count + "道題,答錯了"
                        + (Num - count) + "道題,正確率爲:" + (double) count * 100
                        / Num + "%");
    }

    public class F {// Fraction 分數
        int Molecular;// 分子
        int Denominator = 0;// 分母

        void setMolecular(int Molecular) {
            this.Molecular = Molecular;
        }

        int getMolecular() {
            return Molecular;
        }

        void setDenominator(int Denominator) {
            this.Denominator = Denominator;
        }

        int getDenominator() {
            return Denominator;
        }

        double getAll() {
            return (double) Molecular / Denominator;
        }

        public String toString() {
            return Molecular + "/" + Denominator;
        }
    }

    public class RN {// Random Number 隨機數
        double Decimal;// 小數
        int Integer;// 整數
        F Fraction = new F();// 分數

        int Sign;// 標誌該對象中存儲的是什麼數

        void setDecimal(double Decimal) {
            this.Decimal = Decimal;
        }

        double getDecimal() {
            return Decimal;
        }

        void setInteger(int Integer) {
            this.Integer = Integer;
        }

        int getInteger() {
            return Integer;
        }

        void setMolecular(int Molecular) {
            this.Fraction.setMolecular(Molecular);
        }

        int getMolecular() {
            return this.Fraction.getMolecular();
        }

        void setDenominator(int Denominator) {
            this.Fraction.setDenominator(Denominator);
        }

        int getDenominator() {
            return this.Fraction.getDenominator();
        }

        void setSign(int Sign) {
            this.Sign = Sign;
        }

        double getNumber() {
            switch (Sign) {
            case 0:
                return Decimal;
            case 1:
                return Integer;
            case 2:
                return Fraction.getAll();
            default:
                return -1;
            }
        }

        public String toString() {
            return Fraction.getDenominator() == 0 ? (Integer == 0 ? Decimal
                    + "" : Integer + "") : Fraction.toString();
        }
    }
}

現在只是一個過程,還不是所謂的完整版,所以,還是希望能有高人指點下.

　　　　目前我知道存在的問題是:

　　　　　　1.運算時,結果是由式子從左到用運算了,沒考慮到優先問題.例如:1+2*3=(1+2)*3=9 而真的答案是 7

　　　　　　　　...這個暫時想到棧處理,但是還在觀望中,看下還有沒更簡單的處理方法,我很嫌麻煩的.

　　　　還有很多功能還沒加進來,我的做法是循序漸進,由簡至繁.如果有什麼比較高明的建議的話.請務必指導下

　　　　已解決:

　　　　　　現在已經解決上面1的問題,但是還有小錯誤.就是ArrayList set 功能感覺有點問題.還要研究下.