Which function is used to compare two strings lexicographically in C++?compare()equals()strcmp()strcomp()

Breakdown of the Problem

1. Determine what lexicographic comparison means in the context of strings in C++.
2. Identify the functions provided in the options to see which one performs this comparison.

Relevant Concepts

• Lexicographic order is the order in which words or strings are arranged based on the alphabetical order of their component characters.
• In C++, various functions are available for comparing strings.

Analysis and Detail

1. compare(): This is a member function of the C++ std::string class that compares the calling string with another string.
2. equals(): This function does not exist in the standard C++ library for strings.
3. strcmp(): This is a C function used for comparing two C-style strings (null-terminated character arrays).
4. strcomp(): This appears to be a typographical error as it should likely refer to strcmp(), which is the valid function.

Verify and Summarize

From the provided options, compare() and strcmp() can be used for string comparison, but compare() is specifically designed for C++ std::string objects and provides a more C++-oriented approach.

Final Answer

The function used to compare two strings lexicographically in C++ is compare().