How to Extract a Substring from a Character Array in C++?

In C++, character arrays are used to store sequences of characters also known as strings. A substring is a part of a string that consists of a continuous sequence of characters from the string. In this article, we will learn how to extract a substring from a character array in C++.

Extract a Substring from a Character Array in C++

To extract a substring from a character array in C++ follow the below approach:

Approach

1. Convert the character array to std::string.
2. Declare a temporary string to store the substring.
3. Use the std::substring method to extract the substring.
4. Store the substring in the temporary string.

C++ Program to Extract a Substring from a Character Array

The following program illustrates how we can extract a substring from a character array in C++:

String: Geeks for Geeks
Substring: Geeks

Time Complexity: O(N) where N is the length of the character array.
Auxiliary Space: O(N)