LeetCode12-罗马数字转成数字

image-20230306215031490

思路：例举出所有的情况 然后转成数字

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class Solution {
    public int romanToInt(String s) {
      int[] ints = {1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1};
      String[] str = {"M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"};
      int sum =0;
      for(int i =0 ; i <= str.length -1;i++){
             String dividStr = str[i];
             while(s.startsWith(dividStr)){
                  sum += ints[i];
                  s =s.replaceFirst(dividStr,"");
               
             }
           

      }
      return sum;
     
    }
}

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