数字转中文

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数字转中文

最近公司小哥哥出了个面试题,需求是将一个中文表示的数字，转成中文写法。大家都给出了自己的解法，挺有趣的。

解法

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#!/usr/bin/env python
# coding: utf-8

def num2cn(num):
    num = int(num)
    if num == 0:
        return '零'
    elif num == 1:
        return '一'
    elif num == 2:
        return '二'
    elif num == 3:
        return '三'
    elif num == 4:
        return '四'
    elif num == 5:
        return '五'
    elif num == 6:
        return '六'
    elif num == 7:
        return '七'
    elif num == 8:
        return '八'
    elif num == 9:
        return '九'
    else:
        print('input type error')
        exit(1)  

suffix = ['','十','百','千','万','十万','百万','千万','亿','十亿','百亿','千亿']

# # 1. 定义个到千的规则

import re
import random

def one2thousand(x):
    first_no_zero = False
    # 保存结果
    result = []
    x = str(x)
    # 填充到千位
    x = x.rjust(4,"0")
    len_x = len(x)
    sub_suffix = suffix[:len_x]
    sub_suffix.reverse()
    
    for index, num in enumerate(x):
        if num == '0':
            if first_no_zero == True:
                # 在遇到首个非零数字前，遇到的0都是填充的
                result.append(num2cn(num))
        else:
            result.append(num2cn(num))
            result.append(sub_suffix[index])
            first_no_zero = True
    if len(result) == 0:
        # 输入为0的特殊情况
        return '零'
            
    out = "".join(result)
    # 处理中间的零，将多个“零”，变为一个“零”，如一千零零一 --> 一千零一
    out = re.sub('零+','零',out)
    # 处理末尾的零，，如一千一百零 --> 一千一百
    out = re.sub('零+$','',out)
    return out

for i in range(10):
    inp = str(random.randint(0,10000))
    print('数字：%s \t中文读法：%s'%(inp,one2thousand(inp)))


# # 2. 个到千的规则定义好了，接着将一个数字拆分为许多个到千来处理



suffix2 = ['亿','万','']

def zh_cnNum(x):
    result = []
    x = str(x)
    len_x = len(x)
    # 将x填充到千亿位
    x = x.rjust(len(suffix),"0")
    sub_suffix = suffix[:4]
    # 每次取出4位进行千位读法，并加上单位，如'亿'，'万'，...
    for i in range(3):
        sub_x = x[i*4:i*4+4]
        out = one2thousand(sub_x)
        if out != '零':
            result.append(out)
            result.append(suffix2[i])
    
    if len(result) == 0:
        # 输入为0的特殊情况
        return '零'
    
    return "".join(result)

for i in range(10):
    inp = str(random.randint(0,100000000001))
    print('数字：%s \t中文读法：%s'%(inp,zh_cnNum(inp)))