Question

C++: Design a binary search function with the following interface: bool binary_search_while_loop(int x[], int begin, int end, int search_item) { .... } In the interface of this function, x[ ] is an input array that contains a number of integers, begin and end refer to the start and end index of the array for the search region. search_item is in an input integer variable. The function will find out if search_item is in the

Answer 1

To design a binary search function in C++, utilize a while loop to compare the search_item with the middle element of the subarray and update the begin and end indices accordingly.

Step-by-step explanation:

In order to design a binary search function in C++, you can use a while loop to iterate over the search region and compare the target value with the middle element of the subarray. Here's an example implementation:

bool binary_search_while_loop(int x[], int begin, int end, int search_item) {
while (begin <= end) {
int mid = begin + (end - begin) / 2;
if (x[mid] == search_item)
return true;
if (x[mid] < search_item)
begin = mid + 1;
else
end = mid - 1;
}
return false;
}

This function uses the begin and end indices to define the search region and iteratively reduces the size of the subarray by updating the begin and end indices based on the comparison with the middle element. If the search item is found, the function returns true; otherwise, it returns false.