index-of-smallest-element-of-array.cpp

//index of smallest element of array
/* Example :
size of array =5
Let array be ,arr[5]={9,4,1,5,8}
here smallest element of array is 1 which is at index 2 of array 
output = 2 that is index of smallest element of array.
Time complexity = O(n)
*/

#include<iostream>
using namespace std;
int main()
{
    int size,j;
    cout<<"enter the size of array";
    cin>>size;
    int arr[size];
    for(int i=0;i<size;i++)
    {
        cin>>arr[i];
    }
    //considering the element at zero index to be smallest
    int min=arr[0];
    int smallest_index=0;
    //comparing min to all other elements
    for(j=0;j<size;j++)
    {
        if(min>arr[j])
        {
            min=arr[j];
            smallest_index=j;
        }
    }
    cout<<"index of smallest element of array is"<<smallest_index;
}