用python 设计一个计算器的程序
时间: 2023-09-26 11:06:44 浏览: 51
好的,以下是一个简单的计算器程序的 Python 代码:
```python
# 定义计算器函数
def calculator():
# 获取用户输入
num1 = float(input("请输入第一个数字: "))
op = input("请输入运算符 (+, -, *, /): ")
num2 = float(input("请输入第二个数字: "))
# 根据运算符进行计算并输出结果
if op == "+":
print(num1 + num2)
elif op == "-":
print(num1 - num2)
elif op == "*":
print(num1 * num2)
elif op == "/":
if num2 == 0:
print("除数不能为0!")
else:
print(num1 / num2)
else:
print("无效的运算符")
# 调用计算器函数
calculator()
```
运行程序后,按照提示输入需要计算的数字和运算符,程序会自动计算并输出结果。注意,此程序只是一个简单的示例,还可以根据需要进行改进和扩展。
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用Python 设计一个计算器的程序
好的,以下是一个简单的计算器程序的 Python 代码:
```python
# 定义计算器函数
def calculator():
# 获取用户输入
num1 = float(input("请输入第一个数字: "))
op = input("请输入运算符 (+, -, *, /): ")
num2 = float(input("请输入第二个数字: "))
# 根据运算符进行计算并输出结果
if op == "+":
print(num1 + num2)
elif op == "-":
print(num1 - num2)
elif op == "*":
print(num1 * num2)
elif op == "/":
if num2 == 0:
print("除数不能为0!")
else:
print(num1 / num2)
else:
print("无效的运算符")
# 调用计算器函数
calculator()
```
运行程序后,按照提示输入需要计算的数字和运算符,程序会自动计算并输出结果。注意,此程序只是一个简单的示例,还可以根据需要进行改进和扩展。
用Python 设计一个计算器的可视化程序
好的,以下是一个使用 Python Tkinter 模块实现的计算器可视化程序的代码:
```python
import tkinter as tk
# 定义计算器类
class Calculator:
def __init__(self, master):
self.master = master
master.title("计算器")
# 创建输入框和按钮
self.display = tk.Entry(master, width=30, borderwidth=5)
self.display.grid(row=0, column=0, columnspan=4, padx=10, pady=10)
self.button_1 = tk.Button(master, text="1", padx=40, pady=20, command=lambda: self.button_click(1))
self.button_2 = tk.Button(master, text="2", padx=40, pady=20, command=lambda: self.button_click(2))
self.button_3 = tk.Button(master, text="3", padx=40, pady=20, command=lambda: self.button_click(3))
self.button_4 = tk.Button(master, text="4", padx=40, pady=20, command=lambda: self.button_click(4))
self.button_5 = tk.Button(master, text="5", padx=40, pady=20, command=lambda: self.button_click(5))
self.button_6 = tk.Button(master, text="6", padx=40, pady=20, command=lambda: self.button_click(6))
self.button_7 = tk.Button(master, text="7", padx=40, pady=20, command=lambda: self.button_click(7))
self.button_8 = tk.Button(master, text="8", padx=40, pady=20, command=lambda: self.button_click(8))
self.button_9 = tk.Button(master, text="9", padx=40, pady=20, command=lambda: self.button_click(9))
self.button_0 = tk.Button(master, text="0", padx=40, pady=20, command=lambda: self.button_click(0))
self.button_add = tk.Button(master, text="+", padx=39, pady=20, command=self.button_add)
self.button_subtract = tk.Button(master, text="-", padx=41, pady=20, command=self.button_subtract)
self.button_multiply = tk.Button(master, text="*", padx=40, pady=20, command=self.button_multiply)
self.button_divide = tk.Button(master, text="/", padx=41, pady=20, command=self.button_divide)
self.button_clear = tk.Button(master, text="清除", padx=79, pady=20, command=self.button_clear)
self.button_equal = tk.Button(master, text="=", padx=91, pady=20, command=self.button_equal)
# 将按钮添加到界面
self.button_1.grid(row=3, column=0)
self.button_2.grid(row=3, column=1)
self.button_3.grid(row=3, column=2)
self.button_4.grid(row=2, column=0)
self.button_5.grid(row=2, column=1)
self.button_6.grid(row=2, column=2)
self.button_7.grid(row=1, column=0)
self.button_8.grid(row=1, column=1)
self.button_9.grid(row=1, column=2)
self.button_0.grid(row=4, column=0)
self.button_clear.grid(row=4, column=1, columnspan=2)
self.button_add.grid(row=5, column=0)
self.button_subtract.grid(row=6, column=0)
self.button_multiply.grid(row=6, column=1)
self.button_divide.grid(row=6, column=2)
self.button_equal.grid(row=5, column=1, columnspan=2)
# 定义计算器的状态
self.first_number = None
self.operation = None
self.is_second_number = False
# 处理数字按钮的点击事件
def button_click(self, number):
current = self.display.get()
self.display.delete(0, tk.END)
self.display.insert(0, str(current) + str(number))
# 处理加号按钮的点击事件
def button_add(self):
self.first_number = float(self.display.get())
self.operation = "+"
self.is_second_number = True
self.display.delete(0, tk.END)
# 处理减号按钮的点击事件
def button_subtract(self):
self.first_number = float(self.display.get())
self.operation = "-"
self.is_second_number = True
self.display.delete(0, tk.END)
# 处理乘号按钮的点击事件
def button_multiply(self):
self.first_number = float(self.display.get())
self.operation = "*"
self.is_second_number = True
self.display.delete(0, tk.END)
# 处理除号按钮的点击事件
def button_divide(self):
self.first_number = float(self.display.get())
self.operation = "/"
self.is_second_number = True
self.display.delete(0, tk.END)
# 处理清除按钮的点击事件
def button_clear(self):
self.first_number = None
self.operation = None
self.is_second_number = False
self.display.delete(0, tk.END)
# 处理等号按钮的点击事件
def button_equal(self):
if self.is_second_number:
second_number = float(self.display.get())
self.display.delete(0, tk.END)
if self.operation == "+":
result = self.first_number + second_number
elif self.operation == "-":
result = self.first_number - second_number
elif self.operation == "*":
result = self.first_number * second_number
elif self.operation == "/":
if second_number == 0:
result = "除数不能为0!"
else:
result = self.first_number / second_number
self.display.insert(0, str(result))
self.is_second_number = False
# 创建主窗口并运行程序
root = tk.Tk()
calculator = Calculator(root)
root.mainloop()
```
运行程序后,会弹出一个计算器的界面,用户可以通过点击界面上的按钮进行数字和运算符的输入,计算结果也会显示在界面上的输入框中。