《Leetcode每日一题》482.密钥格式化

关键：

1.小写字母转大写字母

2.模拟

class Solution {
public:
    string licenseKeyFormatting(string s, int k) {
        int len1=s.length();
        int cot=0,sum=0;
        string str1="";
        for (int i =0;i='a'&&s[i]<='z')
                    s[i]=s[i]-32;
                str1.push_back(s[i]);
            }
        }
        int len2=str1.length(),cnt=0;
        sum=len1-cot;
        string str2="";
        for (int i =0;i=len2)
                break;
            str2.push_back('-');
        }
        return str2;
    }
};