笨方法学习Python-习题21: 函数可以返回东西

# coding=utf-8

def add(a,b):
    print("ADDING %d+%d" %(a,b))
    return a + b

def subtract(a,b):
    print("SUBTRACTING %d-%d" %(a,b))
    return a - b

def multiply(a,b):
    print("MULTIPLYING %d*%d" %(a,b))
    return a * b

def divide(a,b):
    print("DIVING %d / %d" %(a,b))
    return a / b

print("Let's do some math with just functions! ")

age = add(20,4)
height = subtract(84,4)
weight = multiply(90,2)
iq = divide(100,2)

print("Age: %d,Height: %d,Weight: %d,IQ: %d"%(age,height,weight,iq))

# A puzzle for the extra credit,type it in anyway.
print("Here is a puzzle")

what = add(age,subtract(height,multiply(weight,divide(iq,2))))
print("That becomes: ",what,"Can you do it by hand?")

"""
Python 词汇 return 来将变量设置为“一个函数的值”

为什么 Python 会把函数或公式倒着打印出来？
其实不是倒着打印，而是自内而外打印。如果你把函数内容逐句看下去，你会发现这里的规律。
"""