20162302 - 20162319 结对编程项目-四则运算（第二周）

结对编程项目-四则运算（第二周）

需求分析

设计思路

一、分数部分

NumOpeGenerator

generateFraction()

public String generateFraction() {
//一个生成分数的方法
int numerator=1 , denominator=0;
while (denominator == 0 || numerator >= denominator) {
numerator = generateNum();
//生成分子
fraction = fmt.format(numerator);
fraction = fraction.concat("/");
denominator = generateNum();
//生成分母
fraction = fraction.concat(fmt.format(denominator) + " ");
}
return fraction;
}

FormulaGenerator_F

FormulaGenerator

InfixToSuffix

RationalNumber

FractionCalculator

evalSingleOp

private String evalSingleOp(char operation, String op1, String op2) {
String result = null;
String n,d;
n = getNumer(op1);
d = getDenom(op1);
int n1 = Integer.parseInt(n);
String d2 = String.valueOf(d);
int d1 = Integer.parseInt(d2);
RationalNumber op3 = new RationalNumber(n1, d1);
n = getNumer(op2);
d = getDenom(op2);
n1 = Integer.parseInt(n);
d2 = String.valueOf(d);
d1 = Integer.parseInt(d2);
RationalNumber op4 = new RationalNumber(n1, d1);

switch (operation) {
case ADD:
result = (op3.add(op4)).toString();
break;
case SUBTRACT:
result = (op3.subtract(op4)).toString();
break;
case MULTIPLY:
result = (op3.multiply(op4)).toString();
break;
case DIVIDE:
result = (op3.divide(op4)).toString();
}

二、括号部分

public void solveOpe(int a){
//把运算符的代号翻译成运算符并输出
if (a==0)
operator = "+";
else if(a==1)
operator = "-";
else if (a==2)
operator = "*";
else if (a==3)
operator = "/";
else if (a==4)
operator = bracket();
}

public String bracket (){
//成对生成括号
direction ++;
if (direction % 2 ==0) {
creativeOpe1();
return ") "+operator1;
}
else {
creativeOpe1();
return operator1+" " +"( ";
}
}

public int count (String string, char operate){
//用于统计符号出现次数
int countNumber = 0;
for (int i=0; i<string.length(); i++ ){
if (operate == string.charAt(i))
countNumber++;
}
return countNumber;
}

public String check(String toCheck){
//检查左右括号数量是否相等
int a = count(toCheck, '(');
int b = count(toCheck, ')');
while (a != b){
toCheck = toCheck.concat(" )");
a = count(toCheck, '(');
b = count(toCheck, ')');
}
return toCheck;
}

三、多语言

System.out.print("请选择语言：简体中文(1)繁體中文(2)English(3)：");
int choice = scan2.nextInt();
if (choice == 1) {

} else if (choice == 2) {
t = "是否使用分式(y/n)：";
n = "請輸入算式個數：";
l = "請輸入算式階數：";
an = "答案是：";
rig = "正確率：";
} else if (choice == 3) {
t = "Whether the fraction is used(y/n): ";
n = "Please enter the number of the expression: ";
l = "Please enter the order of the expression: ";
an = "The answer is: ";
rig = "Correct rate: ";
} else if (choice == 4) {
t = "小数を使用するかどうか (y/n) : ";
n = "数式番号を入力してください: ";
l = "計算順序を入力してください: ";
an = "答えは：";
rig = "精度: ";
} else if (choice == 5) {
t = "следует ли использовать дробные (y/n): ";
n = "пожалуйста, введите номер формула: ";
l = "введите, пожалуйста, порядок вычисления: ";
an = "Ответ заключается в: ";
rig = "Точность: ";
} else {
System.out.println("没有那种语言！默认语言为简体中文，祝您愉快");
}

UML图

运行截图

Junit测试图

合作伙伴