Highest of 5 Numbers

#include <iostream>
using namespace std;//for cout and cin
int main()
{
int a[5], greatest_so_far;
cout << "Enter 5 numbers\n";
for (int i = 0; i<5; i++)
{
cin >> a[i];
}
greatest_so_far = a[0];
for (int i = 0; i < 5; i++)
{
if (a[i] > greatest_so_far)
{
greatest_so_far = a[i];//storing current greatest no.
}
}
cout << "\nGreatest number is: " << greatest_so_far<<endl;
system("pause");// to stop console window to see output
return 0;
}