Which of the following function calls is a valid way to place elements into vector chars? A) std::fill(chars.begin(), chars.end(), '5'); B) std::fill_n(chars.begin(), chars.end(), '5'); C) std::generate(chars.begin(), 10, '5'); D) std::generate_n(10, chars.end(), '5');

Question

Which of the following function calls is a valid way to place elements into vector<char> chars?
A) std::fill(chars.begin(), chars.end(), '5');
B) std::fill_n(chars.begin(), chars.end(), '5');
C) std::generate(chars.begin(), 10, '5');
D) std::generate_n(10, chars.end(), '5');

Quizplus · Accepted Answer

Option A is the only valid option because it correctly uses the std::fill function to fill the vector with the character '5'. Option B is incorrect because it is using the std::fill_n function which is used to fill a specific number of elements with a given value, but it is passing in the full range of the vector instead of just the number of elements to fill. Option C is incorrect because it uses the std::generate function which is used to generate values based on a generator function, not fill the vector with a single value. Option D is also incorrect because it uses the std::generate_n function, but it swaps the arguments and uses 10 as a generator function, whereas it should be used as the number of elements to fill.

Which of the Following Function Calls Is a Valid Way