Binary Search On Vector C

Introduction

Binary search is an efficient algorithm to search for an element in a sorted array. It works by repeatedly dividing the search interval in half. In this article, we will discuss binary search on vector C.

What is a Vector in C?

In C, a vector is a dynamic array that can be resized during runtime. It is defined as an array, but the size of the array is not specified. Instead, the size of the vector is determined during runtime.

Binary Search on Vector C

Binary search on vector C can be implemented using the same algorithm as binary search on a sorted array. The only difference is that instead of an array, we will use a vector. The first step in binary search is to calculate the middle index of the vector. We can do this by adding the first and last indices of the vector and dividing the sum by two. Once we have the middle index, we compare the value at that index with the element we are searching for. If the value is equal to the element, we have found the element. If the value is greater than the element, we repeat the search on the left half of the vector. If the value is less than the element, we repeat the search on the right half of the vector. We continue this process until we either find the element or determine that the element is not in the vector.

Example Code

Here is an example code for binary search on vector C: “` #include #include #include using namespace std; int binary_search(vector vec, int element) { int first = 0; int last = vec.size() – 1; int middle; while (first <= last) { middle = (first + last) / 2; if (vec[middle] == element) { return middle; } else if (vec[middle] > element) { last = middle – 1; } else { first = middle + 1; } } return -1; } int main() { vector vec = {1, 2, 3, 4, 5}; int element = 3; int result = binary_search(vec, element); if (result == -1) { printf(“Element not found\n”); } else { printf(“Element found at index %d\n”, result); } return 0; } “`

Conclusion

Binary search on vector C is a useful algorithm to efficiently search for an element in a dynamic array. It follows the same algorithm as binary search on a sorted array, but instead of an array, it uses a vector. By implementing this algorithm, we can optimize our search operations and improve the performance of our programs.