interpolation_search.cpp File Reference

Interpolation search algorithm More...

#include <iostream>

Include dependency graph for interpolation_search.cpp:

Functions
int	interpolation_search (int arr[], int value, int len)
int	main ()

Detailed Description

Interpolation search algorithm

Function Documentation

interpolation_search()

int interpolation_search	(	int	arr[],
		int	value,
		int	len
	)

function to search the value in an array using interpolation search

Parameters

[in]	arr	array to search in
[in]	value	value to search for
[in]	len	length of array

Returns

index where the value is found

0 if not found

                                                        {
    int low = 0, high, mid;
    high = len - 1;
 
    while (arr[low] <= value && arr[high] >= value) {
        mid = (low +
               ((value - arr[low]) * (high - low)) / (arr[high] - arr[low]));
        if (arr[mid] > value)
            high = mid - 1;
        else if (arr[mid] < value)
            low = mid + 1;
        else
            return mid;
    }
 
    if (arr[low] == value)
        return low;
 
    return -1;
}

main()

int main

(

void

)

main function

           {
    int n, value, re;
 
    std::cout << "Enter the size of array(less than 100) : ";
    std::cin >> n;
 
    int *array = new int[n];
 
    std::cout << "array in ascending (increasing) order : " << std::endl;
 
    for (int i = 0; i < n; i++) std::cin >> array[i];
 
    std::cout << "Enter the value you want to search : ";
    std::cin >> value;
 
    re = interpolation_search(array, value, n);
 
    if (re == -1)
        std::cout << "Entered value is not in the array" << std::endl;
    else
        std::cout << "The value is at the position " << re << std::endl;
 
    delete[] array;
    return 0;
}

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