71. 简化路径

链接：71. 简化路径

题解：力扣

class Solution {
public:
    string simplifyPath(string path) {
        std::stack result;
        int i = 0;
        for (i = 0; i < path.size(); ++i) {
            if (path[i] != '/') {
                break;
            }
        }
        for (; i < path.size();) {
            int begin = i;
            for (; i < path.size(); ++i) {
                if (path[i] == '/') {
                    break;
                }
            }
            cout << i << endl;
            if (i-begin == 2 && path[begin] == '.' && path[i-1] == '.') {
                if (!result.empty()) {
                    result.pop();
                }
            } else if (i-begin == 1 && path[begin] == '.') {
                //continue;
            } else {
                result.push(path.substr(begin, i-begin));
                //cout << path.substr(begin, i-begin) << endl;
            }
            for (; i < path.size(); ++i) {
                if (path[i] != '/') {
                    break;
                }
            }
        }
        std::string result_str;
        while (!result.empty()) {
            cout << result.top() << endl;
            if (result_str.empty()) {
                result_str = result.top();
            } else {
                result_str = result.top() + "/" + result_str;
            }
            cout << result_str << endl;
            result.pop();
        }
        result_str = "/" + result_str;
        return result_str;
    }
};