You'll have to declare two new variables when testing for the min and max numbers.
Let's say you have array my_nums[10] which holds 10 numbers of type int
You can assign the value of my_nums[0] to both min and max, then interate through the array checking if the current index is lower(min) or higher(max) then the current min and max, if either evaluates to true, set min and or max to that array index value.
for ( int i = 0; i < Num_Input; i++ )
{
cout << "Enter a number here: " ;
cin >> Stored_Num;
if ( i == 0 ) min = max = Stored_Num;
else
{
if ( Stored_Num < min ) min = Stored_Num;
if ( max < Stored_Num ) max = Stored_Num;
}
}