Wednesday, 5 August 2015

Recursive C Plus Plus program to linearly search an element in a given array

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Questions:

Recursive C Plus Plus program to linearly search an element in a given array

Code:

#include<iostream>
using namespace std;

/* Recursive function to search x in arr[l..r] */
int recSearch(int arr[], int l, int r, int x)
{
       if (r < l)
              return -1;
       if (arr[l] == x)
              return l;
       return recSearch(arr, l+1, r, x);
}

int main()
{
       int arr[] = {12, 34, 54, 2, 3}, i;
       int n = sizeof(arr)/sizeof(arr[0]);
       int x = 3;
       int index = recSearch(arr, 0, n-1, x);
       if (index != -1)
              cout<<"Element "<<x<<" is present at index "<<index<<endl;
       else
              cout<<"Element"<<x<<" is not present"<<endl;
       return 0;
}



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