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Question

Consider the following recursive implementation of linear search:
Which of the following recursive calls should be added to complete the below code?
#include<stdio.h>
int recursive_search_num(int *arr, int num, int idx, int len)
{
     if(idx == len)
     return -1;
     if(arr[idx] == num)
       return idx;
     return __________;
}
int main()
{
      int arr[5] ={1,3,3,3,5},num=2,len = 5;
      int indx = recursive_search_num(arr,num,0,len);
      printf("Index of %d is %d",num,indx);
      return 0;
}

a.

recursive_search_num(arr, num+1, idx, len);

b.

recursive_search_num(arr, num, idx, len);

c.

recursive_search_num(arr, num, idx+1, len);

d.

recursive_search_num(arr, num+1, idx+1, len);

Answer: (c).recursive_search_num(arr, num, idx+1, len);

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Q. Consider the following recursive implementation of linear search: Which of the following recursive calls should be added to complete the below code?

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