输入三个变量判断其中的最大值

 1 num1 = input("num1:")
 2 num2 = input("num2:")
 3 num3 = input("num3:")
 4 max_num = 0
 5 if num1 > num2:
 6     max_num = num1
 7     if max_num > num3:
 8         print("max_num is:",max_num)
 9     else:
10         print("max_num is:",num3)
11 else:
12     max_num = num2
13     if max_num > num3:
14         print("max_num is:",max_num)
15     else:
16         print("max_num is:",num3)

F:\python代码>python 判断最大值.py
num1:15
num2:30
num3:45
max_num is: 45