What are the string class string functions commonly used in C++?

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Commonly used string functions include: copy, stitching, finding characters, truncation, inversion, case conversion, and so on. Using these string functions, you can easily solve a lot of string manipulation problems and make your code more concise and readable.

1 concatenate the string append ()

To concatenate two strings together, you can use the operator + = or the member function append ():

# include#includeusing namespace std;int main () {string S1 ("I love"); string S2 (">); / / method 1