How to simplify the directory path in C++

In this post, we will learn about how to simplify the directory path using the C++ programming language.

This post will help you to understand the process of simplifying the directory path using C++.

Simplify the directory path in C++

PROBLEM :

Suppose we are provided with a certain string (say S), representing an absolute path for a particular file or dictionary(in Unix format).

What we have to do is that we have to process this string in order to obtain a string that will be representing a simplified absolute path.

There are certain rules for the absolute simplified path :

Rule 1: It must begin with a backslash(“/”).

Rule 2:The absolute path must we not include any whitespaces.

INPUT: Provide string S as input.

OUTPUT: A String representing the simplified directory path is produced as output.

Let us consider some examples to better understand the process:

Ex1:Suppose Input String S =”/Rocky/”

Then the Desired Output will be = “/Rocky”

Ex2:Suppose Input String S =”/Donaldduck/”

Then the Desired Output will be = “/Donaldduck”

CODE:

#include <bits/stdc++.h>
using namespace std;

string solution(string S)
{
string r;
string d;
stack<string> s;
r.append("/");
int l = S.length(); //len to l
for (int i = 0; i < l; i++) {

d.clear();

while (S[i] == '/')
i++;

while (i < l && S[i] != '/') {
d.push_back(S[i]);
i++;
}

if (d.compare("..") == 0) {
if (!s.empty())
s.pop();
}

else if (d.compare(".") == 0)
continue;

else if (d.length() != 0)
s.push(d);
}

stack<string> str; // st1 to str
while (!s.empty()) {
str.push(s.top());
s.pop();
}

while (!str.empty()) {
string temp = str.top();

if (str.size() != 1)
r.append(temp + "/");
else
r.append(temp);

str.pop();
}

return r;
}

int main()
{

string str("/Donaldduck/");
string r = solution(str);
cout <<r;
return 0;
}

OUTPUT:

/Donaldduck