How to Split a C std::string Using Tokens (';')?

Splitting C std::string Using Tokens (";")

Assuming you have a string composed of words separated by semicolons (";"), you aim to split this string into a vector of separate words.

To achieve this, you can leverage the standard library function std::getline. It allows you to read data from a string stream, treating it as a sequence of lines. By defining a delimiter, you can instruct std::getline to split the string into substrings based on that delimiter.

Here's a sample code demonstrating how to do this:

#include <sstream>
#include <iostream>
#include <vector>

using namespace std;

int main() {
    vector<string> strings;
    istringstream f("denmark;sweden;india;us");
    string s;

    while (getline(f, s, ';')) {
        cout << s << endl;
        strings.push_back(s);
    }

    return 0;
}

In this code:

• A vector strings is created to store the split substrings.
• A string stream f is initialized with the input string containing the semicolon-separated words.

• Within the while loop:

  • getline is invoked with the delimiter ';' to extract the next substring s from the string stream.
  • The extracted substring is printed and added to the strings vector.

This approach provides a simple and efficient way to split a string using a specified token, such as ";".

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