How Can I Efficiently Split C Strings Using Tokens?

Efficiently Splitting C strings Using Tokens

For splitting a C std::string into substrings based on specified tokens, there are several approaches you can consider. The most efficient solution depends on the specific requirements of your application.

In your case, where the strings are separated by ; characters, and the use of C string functions and Boost is restricted, you can utilize the std::getline() function. This function allows you to read data from a stream into a string, stopping at a specified delimiter.

Following this approach, here's a simple example using std::getline() to split your string into separate substrings and store them in a vector:

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

using namespace std;

int main() {
    string input = "denmark;sweden;india;us";
    istringstream stream(input);

    vector<string> split_strings;
    string token;

    // Read substrings separated by ';'
    while (getline(stream, token, ';')) {
        cout << token << endl;
        split_strings.push_back(token);
    }
}

This code demonstrates how to read the string character by character using std::getline(), split it based on the ; delimiter, and store the individual substrings in a vector.

By utilizing this approach, you can efficiently split your string into tokens and perform any necessary processing or storage operations as required by your application.

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