20150401 作业2 结对 四则运算(Doing)
2024-10-15 21:11:22
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.
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