roman-numerals | 易学教程

Convert a number into a Roman Numeral in javaScript

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How can I convert integers into roman numerals ? function romanNumeralGenerator (int) { } For example, see the following sample inputs and outputs: 1 = "I" 5 = "V" 10 = "X" 20 = "XX" 3999 = "MMMCMXCIX" Caveat: Only support numbers between 1 and 3999 Rene Pot There is a nice one here on this blog I found using google: http://blog.stevenlevithan.com/archives/javascript-roman-numeral-converter function romanize (num) { if (isNaN(num)) return NaN; var digits = String(+num).split(""), key = ["","C","CC","CCC","CD","D","DC","DCC","DCCC","CM", "","X","XX","XXX","XL","L","LX","LXX","LXXX","XC", "","I"

How do you find a roman numeral equivalent of an integer

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问题 How do you find a roman numeral equivalent of an integer. Is there a java library which provides this capability? I did find a similar question, but I would prefer an out of the box API abstraction for this issue. Its just painful to handle all possible combinations in your code. 回答1: Here is a link for many languages including Java. Here's an extract of relevance: public class RN { enum Numeral { I(1), IV(4), V(5), IX(9), X(10), XL(40), L(50), XC(90), C(100), CD(400), D(500), CM(900), M(1000

How to convert integer value to Roman numeral string?

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问题 How can I convert an integer to its String representation in Roman numerals in C ? 回答1: The easiest way is probably to set up three arrays for the complex cases and use a simple function like: // convertToRoman: // In: val: value to convert. // res: buffer to hold result. // Out: n/a // Cav: caller responsible for buffer size. void convertToRoman (unsigned int val, char *res) { char *huns[] = {"", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"}; char *tens[] = {"", "X", "XX", "XXX",

Convert a number into a Roman Numeral in javaScript

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问题 How can I convert integers into roman numerals? function romanNumeralGenerator (int) { } For example, see the following sample inputs and outputs: 1 = \"I\" 5 = \"V\" 10 = \"X\" 20 = \"XX\" 3999 = \"MMMCMXCIX\" Caveat: Only support numbers between 1 and 3999 回答1: There is a nice one here on this blog I found using google: http://blog.stevenlevithan.com/archives/javascript-roman-numeral-converter function romanize (num) { if (isNaN(num)) return NaN; var digits = String(+num).split(""), key = [

How can you customize the numbers in an ordered list?

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问题 How can I left-align the numbers in an ordered list? 1. an item // skip some items for brevity 9. another item 10. notice the 1 is under the 9, and the item contents also line up Change the character after the number in an ordered list? 1) an item Also is there a CSS solution to change from numbers to alphabetic/roman lists instead of using the type attribute on the ol element. I am mostly interested in answers that work on Firefox 3. 回答1: This is the solution I have working in Firefox 3,

How do you match only valid roman numerals with a regular expression?

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问题 Thinking about my other problem, i decided I can\'t even create a regular expression that will match roman numerals (let alone a context-free grammar that will generate them) The problem is matching only valid roman numerals. Eg, 990 is NOT \"XM\", it\'s \"CMXC\" My problem in making the regex for this is that in order to allow or not allow certain characters, I need to look back. Let\'s take thousands and hundreds, for example. I can allow M{0,2}C?M (to allow for 900, 1000, 1900, 2000, 2900