Read File and Selection Sort

[nearc]

Hi, I need to read a file with a name data.txt instead of array in this code. This is selection sort. Can you tell me if its gonna sort 100,000 elements fine?

      #include <iostream>
    #include <fstream>
    #include <vector>

    using namespace std;

    int main()
    {
        int arr[] = {57,654,465,456,78,4,8,1,6,0};
        for(int i=0; i<10; i++)
        {
            cout<<arr[i]<< ',';
        }
        cout<<endl<<endl;
        for(int i = 0; i< 10; i++)
        {
            int smallest = arr[i];
            int smallestIndex = i;

            for(int m=i; m<10; m++)
            {
                if(arr[m]<smallest)
                {
                    smallest=arr[m];
                    smallestIndex=m;
                }
            }
            swap(arr[i], arr[smallestIndex]);
        }
        for(int i = 0; i<10; i++)
        {
            cout<<arr[i]<< ',';
        }
        cout<<endl<<endl;

        return 0;
    }

[ne555]

O(n^2) is going to take a long time for 100e3 elements
however, for(int i = 0; i< 10; i++) would only consider 10.