Which of the following C++ functions correctly implements binary search?
Practice Questions
Q1
Which of the following C++ functions correctly implements binary search?
int binarySearch(int arr[], int l, int r, int x)
void binarySearch(int arr[], int x)
int binarySearch(int arr[], int x)
bool binarySearch(int arr[], int l, int r)
Questions & Step-by-Step Solutions
Which of the following C++ functions correctly implements binary search?
Step 1: Understand what binary search is. It is a method to find a target value in a sorted array by repeatedly dividing the search interval in half.
Step 2: Identify the function signature. The function should take an array, the left index, the right index, and the target value as parameters.
Step 3: Check the function signature 'int binarySearch(int arr[], int l, int r, int x)'. It has all the required parameters: an array (arr), a left index (l), a right index (r), and a target value (x).
Step 4: Confirm that the function returns an integer, which is typical for binary search to indicate the index of the found element or -1 if not found.
Step 5: Conclude that this function signature is correct for implementing binary search.
