Question

Which of the following is not a modifier function in string class?

(a) operator+=()

(b) operator[]()

(c) push_back()

(d) erase()

The question was asked in a national level competition.

The query is from String in section Source Files, Classes and Operator Overloading in C++ of C++

Answer 1

Correct option is (b) operator[]()

To explain I would say: [] operator is used to access one of the characters of the string objects whereas other functions are used to modify the string in some way.