How to use find_first_not_of() with find() function In C++

find_first_not_of() is used to search the string for the first character that does not match any of the characters specified in the string. The find() function is used to find the first occurrence of a character.

C++

// C++ Program for Conversion
// String To Vector using Delimiter
// Using find_first_not_of()
// with find() function
#include <bits/stdc++.h>
using namespace std;
 
vector<string> split(string str, char delimiter)
{
 
    vector<string> res;
    size_t first;
    size_t last = 0;
 
    while ((first = str.find_first_not_of(delimiter, last))
           != string::npos) {
        last = str.find(delimiter, first);
        res.push_back(str.substr(first, last - first));
    }
    return res;
}
 
int main()
{
    // Delimiter is " "
    string s = "w3wiki is a computer science portal";
    vector<string> res = split(s, ' ');
 
    for (int i = 0; i < res.size(); i++) {
        cout << res[i] << endl;
    }
    // Delimiter is *
    s = "w3wiki*is*a*computer*science*portal";
    res = split(s, '*');
 
    for (int i = 0; i < res.size(); i++) {
        cout << res[i] << endl;
    }
 
    return 0;
}

Output

w3wiki
is
a
computer
science
portal
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: