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.
时间: 2024-11-08 11:24:48