'''
实验二：计算器
'''
import math
while True:        #一直开着计算器
    print("！欢迎使用计算器！")  # 欢迎界面
    system = int(input("请输入进制：1.二进制  2.八进制  3.十进制  4.十六进制\n"))  # 使用不同进制
    pattern = int(input("1.加法 2.减法 3.乘法 4.除法 5.乘方运算 6.三角函数\n"))  # 不同运算法则
    if 6 == pattern:
        pattern6 = int(input("1.sinx  2.cosx  3.tanx\n"))                                      #三角函数种类算术
        c = float(input("请输入一个值(角度)：\n"))
        d = (c*(math.pi))/180
        if pattern6 == 1:
            answer = math.sin(d)
        elif pattern6 == 2:
            answer = math.cos(d)
        elif pattern6 == 3:
            answer = math.tan(d)
        else:
            answer = "错误，请重新输入"
        print("答案：",answer)
    elif pattern>=1 and pattern<=5:                                                 #其他种类算术
        a = float(input("请输入第一个数：\n"))
        b = float(input("请输入第二个数：\n"))
        if 1 == pattern:
            answer = a+b
        elif 2 == pattern:
            answer = a-b
        elif 3 == pattern:
            answer = a*b
        elif 4 == pattern:
            answer = a/b
        elif 5 == pattern:
            answer = a**b
        else:
            answer = '错误，请重新输入'
            continue
        print("答案：",answer)
    else:
        answer = "错误，请重新输入"
        print(answer)
    if type(answer) == str:                                                         #按照选定进制输出答案
        print(answer)
    else:
        if system == 3:
            print("答案：", answer)
        else:
            print("若不为十进制，含浮点型将被转换成整型输出~~~~")
            if system == 1:
                print("答案：",bin(int(answer)))
            elif system == 2:
                print("答案：",oct(int(answer)))
            elif system == 4:
                print("答案：", hex(int(answer)))
    print("__________________________________________我是分割线___________________________________________")