Question

我正在努力解决Q＆amp; A 24 + 34 / 100 - 1023练习21中的数学问题。使用功能：

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

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

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

print "Solve 24 + 34 / 100 - 1023?"
what = subtract(add(24, divide(34,100)),1023)

print "The Answer is", what

我得到的答案是-999 但是当我在计算器上做的时候我得到了= -998.66

如何获得带小数的答案？

Answer 1

您需要返回float个值，而不是integers。通过这样做：

def add(a, b):
    print "ADD %d + %d" % (a, b)
    return float(a + b) # WE RETURN A FLOAT

def subtract(a, b):
    print "SUBTRACT %d - %d" % (a, b)
    return float(a - b) # WE RETURN A FLOAT

def divide(a, b):
    print "DIVIDE %d / %d" % (a, b)
    return float(a / b) # WE RETURN A FLOAT

print "Solve 24 + 34 / 100 - 1023?"
what = subtract(add(24, divide(34.0,100)),1023)

print "The Answer is", what

您将获得以下输出：

Solve 24 + 34 / 100 - 1023?
DIVIDE 34 / 100
ADD 24 + 0
SUBTRACT 24 - 1023
The Answer is -998.66

learnpythonthehardway exercise 21写出一个公式

1 个答案: