# ex21.py 函数可以返回一些东西

def add(a, b):
    print(f"ADDING {a} + {b}")
    return a + b

def subtract(a, b):
    print(f"SUBTRACTING {a} - {b}")
    return a - b

def multiply(a, b):
    print(f"MULTIPLYING {a} * {b}")
    return a * b

def divide(a, b):
    print(f"DIVIDING {a} / {b}")
    return a / b

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

age = add(30, 5)
height = subtract(78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print(f"Age: {age}, Height: {height}, Weight: {weight}, IQ: {iq}")


# A puzzle for the extra credic, 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?")

print(age + (height - (weight * (iq / 2))))
# 用一个函数的返回值作为另一个函数的参数
# 这是在一个链（chain）里进行的
# inside out， 从里到外

print(24 + 34 / 100 - 1023)
print(add(24,subtract(divide(34,100),1023)))
# ex21.py 函数可以返回一些东西

def add(a, b):
    print(f"ADDING {a} + {b}")
    return a + b

def subtract(a, b):
    print(f"SUBTRACTING {a} - {b}")
    return a - b

def multiply(a, b):
    print(f"MULTIPLYING {a} * {b}")
    return a * b

def divide(a, b):
    print(f"DIVIDING {a} / {b}")
    return a / b

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

age = add(30, 5)
height = subtract(78, 4)
weight = multiply(90, 2)
iq = divide(100, 2)

print(f"Age: {age}, Height: {height}, Weight: {weight}, IQ: {iq}")


# A puzzle for the extra credic, 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?")

print(age + (height - (weight * (iq / 2))))
# 用一个函数的返回值作为另一个函数的参数
# 这是在一个链（chain）里进行的
# inside out， 从里到外

print(24 + 34 / 100 - 1023)
print(add(24,subtract(divide(34,100),1023)))
# ex21.py 函数可以返回一些东西 # A puzzle for the extra credic, type it in anyway. # 用一个函数的返回值作为另一个函数的参数 # 这是在一个链（chain）里进行的 # inside out， 从里到外