将单词（字符串）转换为Int

我确信这已经完成了一百次，但我希望有一个非常简单的方法来实现这一点。 我想把单词改成int。

像下面的例子

 一个= 1
两个= 2
三= 3

所以基本上如果我有字符串“One”它会转换为1，即使我可以返回一个字符串“1”我可以转换它。

Answer 1

这样做是为了好玩……可能有许多边缘情况会失败……

private static Dictionary numberTable= new Dictionary {{"zero",0},{"one",1},{"two",2},{"three",3},{"four",4}, {"five",5},{"six",6},{"seven",7},{"eight",8},{"nine",9}, {"ten",10},{"eleven",11},{"twelve",12},{"thirteen",13}, {"fourteen",14},{"fifteen",15},{"sixteen",16}, {"seventeen",17},{"eighteen",18},{"nineteen",19},{"twenty",20}, {"thirty",30},{"forty",40},{"fifty",50},{"sixty",60}, {"seventy",70},{"eighty",80},{"ninety",90},{"hundred",100}, {"thousand",1000},{"million",1000000},{"billion",1000000000}, {"trillion",1000000000000},{"quadrillion",1000000000000000}, {"quintillion",1000000000000000000}}; public static long ToLong(string numberString) { var numbers = Regex.Matches(numberString, @"\w+").Cast() .Select(m => m.Value.ToLowerInvariant()) .Where(v => numberTable.ContainsKey(v)) .Select(v => numberTable[v]); long acc = 0,total = 0L; foreach(var n in numbers) { if(n >= 1000) { total += (acc * n); acc = 0; } else if(n >= 100){ acc *= n; } else acc += n; } return (total + acc) * ( numberString.StartsWith("minus", StringComparison.InvariantCultureIgnoreCase) ? -1 : 1); } 

Answer 2

这是一种方法。 如果您需要更广泛的范围，它很容易扩展; 只需使用long ， ulong甚至BigInt ，并在modifiers词典中添加更多项目。

 static int ParseEnglish(string number) { string[] words = number.ToLower().Split(new char[] {' ', '-', ','}, StringSplitOptions.RemoveEmptyEntries); string[] ones = {"one", "two", "three", "four", "five", "six", "seven", "eight", "nine"}; string[] teens = {"eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen"}; string[] tens = {"ten", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"}; Dictionary modifiers = new Dictionary() { {"billion", 1000000000}, {"million", 1000000}, {"thousand", 1000}, {"hundred", 100} }; if(number == "eleventy billion") return int.MaxValue; // 110,000,000,000 is out of range for an int! int result = 0; int currentResult = 0; int lastModifier = 1; foreach(string word in words) { if(modifiers.ContainsKey(word)) { lastModifier *= modifiers[word]; } else { int n; if(lastModifier > 1) { result += currentResult * lastModifier; lastModifier = 1; currentResult = 0; } if((n = Array.IndexOf(ones, word) + 1) > 0) { currentResult += n; } else if((n = Array.IndexOf(teens, word) + 1) > 0) { currentResult += n + 10; } else if((n = Array.IndexOf(tens, word) + 1) > 0) { currentResult += n * 10; } else if(word != "and") { throw new ApplicationException("Unrecognized word: " + word); } } } return result + currentResult * lastModifier; }