【笨方法学python】ex21 - 函数可以返回东西

代码如下：

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# coding=utf-8
# 函数可以返回东西

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


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


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


def divide(a, b):  # 除法
    print "DIVIDING %d / %d" % (a, b)
    return a / b


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

age = add(30, 5)  # age = 30 + 5 = 35
height = subtract(78, 4)  # height = 78 - 4 = 74
weight = multiply(90, 2)  # weight = 90 * 2 = 180
iq = divide(100, 2)  # iq = 100 / 2 = 50

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

# A puzzle for the extra credit, type it in any way.
print "Here is a puzzle."

what = add(age, subtract(height, multiply(weight, divide(iq, 2))))
# what = 35 + (74 - (180 * (50 / 2) ) ) = -4391

print "That becomes: ", what, "Can you do it by hand?"

执行结果：