笨办法学python3练习代码ex21.py

 1 def add(a, b):
 2     print(f"ADDING {a} + {b}")
 3     return (a + b) 
 4     
 5    
 6 def subtract(a, b):         #subtract  :减去的意思
 7     print(f"SUBTRACT {a} - {b}")
 8     return a - b 
 9     
10 def multiply(a, b):
11     print(f"MULTIPLY {a } * {b}")
12     return a * b
13 
14 def divide(a, b):
15     print(f"DIVIDE {a} / {b}")
16     return a / b
17 
18 
19 print("Let‘s do some math with just function!")
20 age = add(30, 5)
21 height = subtract(78, 4)
22 weight = multiply(90, 2)
23 iq = divide(100, 2)
24 
25 print(f"age: {age}, Height: {height}, Weight: {weight}, IQ: {iq} ")
26 
27 
28 #A puzzle(难题、疑问) for the extra credit,type it in anyway
29 print("Here is a puzzle.")
30 
31 #四则混合运算
32 what = add(age, subtract(height, multiply(weight, divide(iq, 2))))
33 print("That becomes: ",what, "Can you do it by hand? ")