You know that iteration over the words can be done using different methods in C++. Also, you know that the std::stringstream is the most common method for iterating over the words of a string. Here is another method using the iterators and std::string::find(), which will give you more flexibility for this task.
Using the iterators and find()
The iterators and find() in C++ is a manual technique to find whitespace in the string and iterate over the words of that string. You can use this method when some specific delimiters are to be implemented. Also, it provides you with precise control over parsing and extracting words efficiently in C++ programming. It helps to handle the multiple delimiters and large strings. Unlike the std::stringstream, which totally depends on the whitespace as the delimiter, the std::string::find() helps you specify the custom delimiters. This method is more efficient for iterating over the words of the large strings as it avoids the overhead of stream-based operations and potential errors.
Example 1:
Output:
In this code, std::string::find() checks for whitespace, separates substrings into different words and iterates over them.
Example 2:
Output:
In this code, str::string::find() is used to check for whitespace, separate substrings into different words, and iterate over them.
Conclusion
You know that every method used for iterating over the words of a string in C++ has its advantages, and the std::stringstream method is very simple and easy to use. But we have discussed that you can also use the iterators and std::string::find() to iterate over the words of a string because it provides us high flexibility and efficiency, as it handles the customized delimiters very well. This method also provides you with clear, readable, and concise code, which is very important for C++ programming. So, by learning this method, you can easily iterate over the words of a string in C++.
Some Other Methods to Iterate over Strings in C++
- regex_iterator() function in C++
- Using std::stringstream in C++
The following articles present a detailed introduction to the fundamental aspects of C++ programming.-
String stream in C++ – Shows how to use stringstream for string-to-number conversion.
Regex iterator in C++ – Demonstrates iterating over all regex matches in a string.
Read input until EOF in C++ – Demonstrates use of cin and getline() to handle EOF correctly.
Accessing array bounds in C++ – Discusses risks and consequences of accessing out-of-bounds indices.
Where to find the current C/C++ standard documents? – Lists sources like ISO, ANSI, and open-access drafts.