题解 | #空格替换#基于insert和erase函数

class Replacement {
  public:
    string replaceSpace(string iniString, int length) {
        string s = "%20";
        for (int i = 0; i < iniString.size(); i++) {
            if (iniString[i] == ' ') {
                iniString.erase(i,1);
                iniString.insert(i, s);
            }
        }
        return iniString;
    }
};