How to Tokenize a `std::string` Without Using `strtok()`?

Tokenizing a std::string with strtok

Tokenizing a std::string can be done using a variety of methods. One common approach is to use the C function strtok(), which takes a character array as input and breaks it up into tokens based on a specified delimiter. However, std::string objects cannot be directly passed to strtok() because they do not point to a character array.

To overcome this limitation, we can use an alternative method to tokenize the std::string. One such method is to use an istringstream object, which can be created by passing the std::string to its constructor. The istringstream object can then be used to read tokens from the string using the getline() function, which takes a delimiter as its second argument.

#include <iostream>
#include <string>
#include <sstream>

int main() {
    std::string myText("some-text-to-tokenize");
    std::istringstream iss(myText);
    std::string token;
    while (std::getline(iss, token, '-')) {
        std::cout << token << std::endl;
    }
    return 0;
}

In this example, the istringstream object is used to read the std::string "some-text-to-tokenize" into a series of tokens, delimited by the "-" character. The getline() function is used to extract each token from the string, and the tokens are then printed to the console.

An alternative to using an istringstream is to use a utility such as Boost.Tokenizer, which provides a more flexible and customizable approach to tokenizing strings. However, the istringstream approach is generally sufficient for basic tokenization needs.

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