How to Split a String into an Array in C++? Last Updated : 04 Mar, 2024 Comments Improve Suggest changes Like Article Like Report In C++, splitting a string into an array of substrings means we have to parse the given string based on a delimiter and store each substring in an array. In this article, we will learn how to split a string into an array of substrings in C++. Example: Input: str= “Hello, I am Geek from geeksforgeeks” Delimiter= ’ ’ Output: Hello, I am Geek from geeksforgeeksSplitting a String into an Array in C++To split a string into an array of substrings in C++, we can use the std::istringstream class from the <sstream> library to create an input stream from the string. We can then split the string based on some delimiter using getline() and store them into the array of strings. ApproachCreate an input string stream from the input string using std::istringstream.Iterate through the stream, using std::getline to extract each substring separated by the delimiter.Add the extracted substring to the array.Print the array of substrings.C++ Program for Splitting a String into an ArrayThe below example demonstrates how we can split a given string into an array of substrings in C++. C++ // C++ Program to illustrate how to split a string into an // array of substrings #include <iostream> #include <sstream> #include <string> using namespace std; // Function to split a string into tokens based on a // delimiter void splitString(string& input, char delimiter, string arr[], int& index) { // Creating an input string stream from the input string istringstream stream(input); // Temporary string to store each token string token; // Read tokens from the string stream separated by the // delimiter while (getline(stream, token, delimiter)) { // Add the token to the array arr[index++] = token; } } int main() { // Input string string input = "Hello, I am Geek from Geeksforgeeks"; // Delimiter char delimiter = ' '; // Array to store the substrings string arrayOfSubStr[100]; // Index to keep track of the number of substrings int index = 0; // Calling the function to split the input string into // an array of substrings splitString(input, delimiter, arrayOfSubStr, index); // Print the array of substrings for (int i = 0; i < index; i++) { cout << arrayOfSubStr[i] << endl; } return 0; } OutputHello, I am Geek from Geeksforgeeks Time complexity: O(N), here N is the length of the input string.Auxiliary Space: O(N) Comment More infoAdvertise with us Next Article How to Split a String into an Array in C++? 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