How to Split a String into an Array in C++?

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
geeksforgeeks

Splitting 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.

Approach

• Create 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 Array

The below example demonstrates how we can split a given string into an array of substrings in C++.

Hello,
I
am
Geek
from
Geeksforgeeks

Time complexity: O(N), here N is the length of the input string.
Auxiliary Space: O(N)