How do I binary search with algorithms with std::span?

Binary search is an efficient search algorithm that finds the position of a target value within a sorted array. In C++17 and later, you can utilize `std::span` to represent a view over a contiguous sequence of elements. Below is an example of how to implement binary search using `std::span`.

#include #include #include int binarySearch(std::span arr, int target) { auto it = std::lower_bound(arr.begin(), arr.end(), target); if (it != arr.end() && *it == target) { return std::distance(arr.begin(), it); } return -1; // Target not found } int main() { int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; std::span spanArr(arr, 10); int target = 7; int result = binarySearch(spanArr, target); if (result != -1) { std::cout << "Element found at index: " << result << std::endl; } else { std::cout << "Element not found!" << std::endl; } return 0; }

C++ binary search std::span algorithms data structures

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