linear_search.cpp File Reference

Linear search algorithm More...

#include <iostream>

Include dependency graph for linear_search.cpp:

Functions
int	LinearSearch (int *array, int size, int key)
int	main ()

Detailed Description

Linear search algorithm

Function Documentation

LinearSearch()

int LinearSearch	(	int *	array,
		int	size,
		int	key
	)

Algorithm implementation

Parameters

[in]	array	array to search in
[in]	size	length of array
[in]	key	key value to search for

Returns

index where the key-value occurs in the array

-1 if key-value not found

                                                {
    for (int i = 0; i < size; ++i) {
        if (array[i] == key) {
            return i;
        }
    }
 
    return -1;
}

main()

int main

(

void

)

main function

           {
    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;
}