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codewars--js--Roman Numerals Encode

凤明朗
2023-12-01

问题描述:(将阿拉伯数字转换成罗马数字)

Create a function taking a positive integer as its parameter and returning a string containing the Roman Numeral representation of that integer.

Modern Roman numerals are written by expressing each digit separately starting with the left most digit and skipping any digit with a value of zero. In Roman numerals 1990 is rendered: 1000=M, 900=CM, 90=XC; resulting in MCMXC. 2008 is written as 2000=MM, 8=VIII; or MMVIII. 1666 uses each Roman symbol in descending order: MDCLXVI.

Example:

solution(1000); // should return 'M'

Help:

Symbol    Value
I          1
V          5
X          10
L          50
C          100
D          500
M          1,000

Remember that there can't be more than 3 identical symbols in a row.

 

优秀答案:

 1 function solution(number){
 2   // convert the number to a roman numeral
 3 var  roman = {M:1000,CM:900, D:500,CD:400,C:100,XC:90,L:50,XL:40,X:10,IX:9,V:5,IV:4,I:1 }
 4 
 5 var ans = '';
 6 while(number>0){
 7     for(a in roman){ 
 8         if(roman[a]<=number){ ans += a; number-=roman[a]; break;}
 9             
10     }
11 }
12 return ans;
13 }

 

转载于:https://www.cnblogs.com/hiluna/p/8743539.html

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