软件工程个人作业01（2）

增加了验证的功能，其他功能待续……

    public static char yunsuan;
    public static int a;
    public static int b;
    public static int result;
    
    public char getyunsuan() {
        return yunsuan;
    }
    public int geta() {
        return a;
    }
    public int getb() {
        return b;
    }
    
    public static void main(String[] args)
    {
     
        for(int i=0;i<30;i++){    //for循环定义题目数量
            char [] fu = new char [4];
            fu[0] = '/';
            fu[1] = '+';
            fu[2] = '-';
            fu[3] = '*';
            yunsuan=fu[new Random().nextInt(4)];
            a= new Random().nextInt(100) + 1;
            b= new Random().nextInt(100) + 1;
        
            if(yunsuan=='+')
                result=a+b;
            else if(yunsuan== '-')
                result=a-b;
            else if(yunsuan=='*')
                result=a*b;
            else
                result=a/b;
        }
    }
    
    @SuppressWarnings("resource")
    public String yanzheng() {
        
        System.out.print(a+ " "+yunsuan+ " " + b+ " = ");
        int str = new Scanner(System.in).nextInt();
        if(str == result)
            return "回答正确";
        else
            return "错误，正确答案为"+result;
    }
}