Append character to string
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erase
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copy
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push_back
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swap
Reveal answer
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C
Correct answer
Explanation
push_back() is the standard C++ string method to append a single character to the end of the string. erase() removes characters, copy() copies a substring, and swap() exchanges two strings' contents.
AI explanation
push_back is the standard C++ std::string member function that appends a single character to the end of the string, mirroring the vector method of the same name. erase removes characters, copy copies content into a buffer, and swap exchanges contents with another string — none of them append.