How to use regex_token_iterator In C++

Q: How to use regex_token_iterator In C++

It works for single-character delimiters.

4. Using find_first_not_of() with find() function

The regex token iterator tokenizes the sentence based on the given regular expression.

C++

// C++ Program for Conversion
// String To Vector using Delimiter
// Using regex_token_iterator
#include <bits/stdc++.h>
using namespace std;
 
int main()
{
    // Delimiter is " "
    string s = "w3wiki is a computer science portal";
 
    regex reg("\\ ");
 
    vector<string> res1(
        sregex_token_iterator(s.begin(), s.end(), reg, -1),
        sregex_token_iterator());
 
    for (int i = 0; i < res1.size(); i++)
    {
        cout << res1[i] << endl;
    }
 
    return 0;
}

Output

w3wiki
is
a
computer
science
portal

C++ String to Vector Using Delimiter

Delimiters are used as separators between the characters or words in a string so that different results can get separated by the delimiter. In this article let us see the different ways in which a string with delimiters can be converted to a vector of words after getting separated by delimiters.

Example:

string x=”A B C”;

string y=”A*B*C”;

// Separate x into [‘A’,’B’,’C’] with delimiter ‘ ‘

// Separate y into [‘A’,’B’,’C’] with delimiter ‘*’

Methods that can be used to perform this operation are :

Using find() function
Using strtok() function
Using getline() and stringstream
Using find_first_not_of() with find() function
Using regex_token_iterator

Tags:

#cpp-string #cpp-vector #STL #Technical Scripter 2022 #C++ #Technical Scripter #CPP #STL

4. Using find_first_not_of() with find() function

How to use regex_token_iterator In C++

C++

C++ String to Vector Using Delimiter

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