【每日一题1129】Round Up

:woman_mage: 给定一个浮点数,请编写一个函数,将其按照0.5为跨度进行舍入操作。如果小数位刚好是5结尾,那么则上浮。

示例:
输入:4.2,输出:4。因为在4和4.5之间,距离4较近。
输入:4.3,输出:4.5。
输入:4.75,输出:5。

题目难度:中等
题目来源:codewars: Round by 0.5 steps

def solution(num: float):
    # your code

assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5 
assert solution(4.75) == 5 
def solution(num: float):
    s = divmod(num,0.5)
    num_float = s[1]
    if num_float >= 0.25:
        return (s[0]+1)*0.5
    else:
        return s[0]*0.5
2 Likes
def solution(num: float):
    return int(num) + (0 if (num - int(num)) < 0.25 else 0.5 if 0.75 > (num - int(num)) > 0.25 else 1)


assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5
1 Like
def solution(num: float):
    if (num-int(num)) < 0.25:
        return (int(num))
    elif (num-int(num)) >=0.25 and (num-int(num)) <0.75:
        return (int(num)+0.5)
    else:
        return (int(num)+1)
if __name__ == '__main__':
    assert solution(4.2) == 4
    assert solution(4.3) == 4.5
    assert solution(4.6) == 4.5
    assert solution(4.75) == 5
def solution(num: float):
    if 0 < num - int(num) < 0.25:
        return int(num)
    elif 0.25 <= num - int(num) < 0.75:
        return int(num) + 0.5
    elif 0.75 <= num - int(num) < 1:
        return int(num) + 1


assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5
def solution(num: float):
    # if 0 < num - int(num) < 0.25:
    #     return int(num)
    # elif 0.25 <= num - int(num) < 0.75:
    #     return int(num) + 0.5
    # elif 0.75 <= num - int(num) < 1:
    #     return int(num) + 1
    return int(num) if 0<num-int(num)<0.25 else int(num)+0.5 if 0.25 <= num - int(num) < 0.75 else int(num)+1

assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5
def solution(num: float):
    tmp = num
    arr=str(tmp).split('.')
    tmp1 = arr[0]
    tmp1_target1 = float(tmp1 + '.25')
    tmp1_target2 = float(tmp1 + '.5')
    tmp1_target3 = float(tmp1 + '.75')
    if num >= tmp1_target3:
        return int(tmp1) + 1
    elif tmp1_target3 > num >= tmp1_target1:
        return tmp1_target2
    else:
        return int(tmp1)


assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5
def solution(num: float):
    num_int = int(num)
    if num >= num_int + 0.75:
        return num_int + 1
    elif num >= num_int + 0.25:
        return num_int + 0.5
    else:
        return num_int


assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5
def solution(num: float):
    dor = 0.5 if num%1%0.5/0.5 >= 0.5 else 0
    return num//1 + num%1//0.5*0.5 + dor
def solution(num: float):
    if num - int(num) < 0.25:
        return int(num)
    elif num - int(num) >=0.25 and num - int(num) <0.75:
        return int(num)+0.5
    else:
        return int(num)+1


assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5

import math


def solution(num):
    result = {}
    key_list = []
    min_num = math.floor(num)
    max_num = min_num + 1
    middle_num = (min_num + max_num)/2

    result[min_num] = abs(min_num-num)
    result[max_num] = abs(max_num-num)
    result[middle_num] = abs(middle_num-num)
    # print(result)
    min_num_value = min(abs(min_num - num), abs(max_num - num), abs(middle_num - num))

    for key, value in result.items():
        if min_num_value == value:
            key_list.append(key)

    if num>middle_num:
        return max(key_list)
    else:
        return min(key_list)

assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5
assert solution(4.1333) == 4

能解释下不

先向下取整,然后判断小数部分距离那个段更近

def solution(num: float):
    nums = str(num).split('.')
    num1 = int(nums[0])
    num2 = nums[1]
    if int(num2) % 5 == 0:
        num1 += 0.5
    if -3 < int(num2[0]) - 5 < 3:
        num1 += 0.5
    elif int(num2[0]) - 5 > 2:
        num1 += 1
    return num1
def solution(num: float):
    integer = int(num)
    remain = num - int(num)
    if remain < .25:
        pass
    elif remain < .75:
        integer += .5
    else:
        integer += 1
    # your code
    return integer


assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5

def solution(num: float):
    return 0.5 * (num // 0.5+1) if num % 0.5 >= 0.25 else 0.5 * (num // 0.5)
1 Like

记录

def solution(num: float):
    num = round(num, 1)
    a = num % 1
    if(a<0.25):
        num = int(num)
    elif(a>=0.25 and a<0.75):
        num = int(num) + 0.5
    else:
        num = int(num) + 1
    return num

assert solution(4.2) == 4
assert solution(4.3) == 4.5
assert solution(4.6) == 4.5
assert solution(4.75) == 5

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