simplify path

Given an absolute path for a file (Unix-style), simplify it.

For example,
path = “/home/“, => “/home”
path = “/a/./b/../../c/“, => “/c”
click to show corner cases.

Corner Cases:
Did you consider the case where path = “/../“?
In this case, you should return “/“.
Another corner case is the path might contain multiple slashes ‘/‘ together, such as “/home//foo/“.
In this case, you should ignore redundant slashes and return “/home/foo”.

string simplifyPath(string path) {
    stack<string>st;
    string name = "";
    path.append(1,'/');
    
    for(int i=0; i<path.size(); i++){
        if(path[i] == '/'){
            if(name.size() != 0){
                if(name == "."){}
                else if(name == ".."){
                    if(!st.empty())st.pop();
                }
                else{
                    st.push(name);
                }
                name = "";
            }
        }
        else{
            name += path[i];
        }
    }
    
    string res = "";
    if(st.empty()) return "/";
    while(!st.empty()){
        res = "/"+ st.top() + res;
        st.pop();
    }
    
    return res;
    
}

simplify path

近期文章

近期评论

标签

热门

文章归档

分类目录

功能