简单版本
使用 Python 的 Tkinter 模块来实现一个简单的图形化计算器。以下是一个基本的示例代码
示例效果
代码源码
python
import tkinter as tk
def button_click(number):
current = entry.get()
entry.delete(0, tk.END)
entry.insert(0, current + str(number))
def button_clear():
entry.delete(0, tk.END)
def button_equal():
result = eval(entry.get())
entry.delete(0, tk.END)
entry.insert(0, result)
root = tk.Tk()
root.title("简易计算器")
entry = tk.Entry(root, width=35, borderwidth=5)
entry.grid(row=0, column=0, columnspan=4, padx=10, pady=10)
buttons = [
("7", 1, 0), ("8", 1, 1), ("9", 1, 2), ("/", 1, 3),
("4", 2, 0), ("5", 2, 1), ("6", 2, 2), ("*", 2, 3),
("1", 3, 0), ("2", 3, 1), ("3", 3, 2), ("-", 3, 3),
("0", 4, 0), (".", 4, 1), ("=", 4, 2), ("+", 4, 3)
]
for button_text, row, col in buttons:
button = tk.Button(root, text=button_text, padx=20, pady=20, command=lambda text=button_text: button_click(text))
button.grid(row=row, column=col)
clear_button = tk.Button(root, text="清除", padx=61, pady=20, command=button_clear)
clear_button.grid(row=5, column=0, columnspan=2)
equal_button = tk.Button(root, text="=", padx=61, pady=20, command=button_equal)
equal_button.grid(row=5, column=2, columnspan=2)
root.mainloop()
高级版本
相比于基础版本增加了很多的判断,并且对UI页面也进行了优化
实现效果
代码源码
python
import tkinter as tk
def button_click(char):
if calculated:
entry.delete(0, tk.END)
globals()['calculated'] = False
entry.insert(tk.END, char)
def button_clear():
entry.delete(0, tk.END)
def button_equal():
try:
result = eval(entry.get())
entry.delete(0, tk.END)
entry.insert(tk.END, str(result))
globals()['calculated'] = True
except:
entry.delete(0, tk.END)
entry.insert(tk.END, "Error")
globals()['calculated'] = False
calculated = False
root = tk.Tk()
root.title("简易计算器")
entry = tk.Entry(root, width=35, borderwidth=5)
entry.grid(row=0, column=0, columnspan=4, padx=10, pady=10)
# 定义按钮布局和样式
buttons = [
("7", 1, 0), ("8", 1, 1), ("9", 1, 2), ("+", 1, 3),
("4", 2, 0), ("5", 2, 1), ("6", 2, 2), ("-", 2, 3),
("1", 3, 0), ("2", 3, 1), ("3", 3, 2), ("*", 3, 3),
("0", 4, 0), ("清除", 4, 1), ("=", 4, 2), ("/", 4, 3)
]
# 创建并放置按钮
for button_text, row, col in buttons:
if button_text == "=":
button = tk.Button(root, text=button_text, padx=20, pady=20, font=("Helvetica", 12), bg="lightgray", command=button_equal)
elif button_text == "清除":
button = tk.Button(root, text=button_text, padx=20, pady=20, font=("Helvetica", 12), bg="lightgray", command=button_clear)
else:
button = tk.Button(root, text=button_text, padx=20, pady=20, font=("Helvetica", 12), bg="lightgray", command=lambda text=button_text: button_click(text))
button.grid(row=row, column=col, padx=5, pady=5)
root.mainloop()