TheAlgorithms-C-Plus-Plus/search/linear_search.cpp

#include <iostream>

int LinearSearch(int *array, int size, int key) {
    for (int i = 0; i < size; ++i) {
        if (array[i] == key) {
            return i;
        }
    }

    return -1;
}

int main() {
    int size;
    std::cout << "\nEnter the size of the Array : ";
    std::cin >> size;

    int *array = new int[size];
    int key;

    // Input array
    std::cout << "\nEnter the Array of " << size << " numbers : ";
    for (int i = 0; i < size; i++) {
        std::cin >> array[i];
    }

    std::cout << "\nEnter the number to be searched : ";
    std::cin >> key;

    int index = LinearSearch(array, size, key);
    if (index != -1) {
        std::cout << "\nNumber found at index : " << index;
    } else {
        std::cout << "\nNot found";
    }

    delete[] array;
    return 0;
}