How do I use substr() in C++17?
An example of an AI chatbot conversation about using substr() in C++17 strings.
Can you explain how to use the substr() function in C++17?
Sure! The substr() function in C++17 is used to extract a substring from a string. You can specify the starting index and the length of the substring.
What is the syntax for substr()?
The syntax is: string.substr(start_index, length); where start_index is the position to start from, and length is the number of characters to include.
Can you give me an example?
Of course! If you have a string std::string str = "Hello, World!";, then str.substr(7, 5); will return "World".
What happens if I provide an out-of-bounds index?
If you provide an out-of-bounds index, it will throw an std::out_of_range exception. It's important to check the string length before using substr().
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