C++ String Split Purpose Explained

1 year ago
Emily Johnson
2 minutes

The purpose of the string split function in C++ is to separate a string into multiple substrings based on a specified delimiter, and store these substrings in a container (such as a vector or array) for retrieval.

Typically, we need to split a string by spaces, commas, or other specific characters, and then use the resulting substrings for further processing and analysis. The String split function offers a convenient way to achieve this functionality without manually writing complex string processing algorithms.

Here is an example code using the string split function:

#include <iostream>
#include <string>
#include <vector>

std::vector<std::string> split(const std::string& str, char delimiter) {
    std::vector<std::string> tokens;
    std::string token;
    std::istringstream tokenStream(str);
    while (std::getline(tokenStream, token, delimiter)) {
        tokens.push_back(token);
    }
    return tokens;
}

int main() {
    std::string str = "Hello,World,!";
    std::vector<std::string> result = split(str, ',');
    for (const auto& token : result) {
        std::cout << token << std::endl;
    }
    return 0;
}

The code above splits the string “Hello,World,!” by commas, stores the substrings in a vector, and then outputs each substring one by one. The output is:

Hello
World
!

It is possible to use the string split function to easily divide a string into multiple substrings for further processing and analysis.

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