Which method is used to find a substring within a string in C++?find()substr()search()locate()

To find a substring within a string in C++, the primary method used is find(). Here's a brief analysis of each option provided:

1. find(): This method is part of the C++ Standard Library and is specifically designed to locate the first occurrence of a substring within a string. It returns the starting position of the substring if found or string::npos if it is not found.

2. substr(): This method is used to extract a substring from a string, but it does not find the position of a substring within a larger string.

3. search(): This is not a standard method in the C++ string class for finding substrings. While it may refer to searching algorithms in different contexts, it is not specific to the C++ string class.

4. locate(): This is also not a method in the C++ string class for substring searching.

Final Answer

The correct method to find a substring within a string in C++ is find().