Python 程序可创建执行计算器操作的类
当需要创建一个执行计算器操作的类时,将采用对象导向的方法。这里先定义一个类,并定义属性。在类中定义一些能够执行特定操作的函数。创建一个类的实例,并使用这些函数执行计算器操作。
下面是它的一个演示 −
例子
class calculator_implementation(): def __init__(self,in_1,in_2): self.a=in_1 self.b=in_2 def add_vals(self): return self.a+self.b def multiply_vals(self): return self.a*self.b def divide_vals(self): return self.a/self.b def subtract_vals(self): return self.a-self.b input_1 = int(input("Enter the first number: ")) input_2 = int(input("Enter the second number: ")) print("The entered first and second numbers are : ") print(input_1, input_2) my_instance = calculator_implementation(input_1,input_2) choice=1 while choice!=0: print("0. Exit") print("1. Addition") print("2. Subtraction") print("3. Multiplication") print("4. Division") choice=int(input("Enter your choice... ")) if choice==1: print("The computed addition result is : ",my_instance.add_vals()) elif choice==2: print("The computed subtraction result is : ",my_instance.subtract_vals()) elif choice==3: print("The computed product result is : ",my_instance.multiply_vals()) elif choice==4: print("The computed division result is : ",round(my_instance.divide_vals(),2)) elif choice==0: print("Exit") else: print("Sorry, invalid choice!") print()
输出
Enter the first number: 70 Enter the second number: 2 The entered first and second numbers are : 70 2 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 1 The computed addition result is : 72 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 2 The computed subtraction result is : 68 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 3 The computed product result is : 140 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 4 The computed division result is : 35.0 0. Exit 1. Addition 2. Subtraction 3. Multiplication 4. Division Enter your choice... 0 Exit
说明
- 这里定义了一个名为“calculator_implementation”的类,它具有“add_vals”、“subtract_vals”、“multiply_vals”和“divide_vals”之类的函数。
- 它们分别用于执行加、减、乘、除之类的计算器操作。
- 这里创建了这个类的实例。
- 输入两个数字的值,并对其执行操作。
- 将在控制台上显示相关消息和输出。
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