Source code in the freebasic programming language

Function PermBig(x As Long, y As Long) As ULongint
    Dim As Long i
    Dim As Longint z = 1
    For i = x - y + 1 To x
        z = z * i
    Next i
    Return (z)
End Function

Function FactBig(x As Long) As ULongint
    Dim As Long i
    Dim As Longint z = 1
    For i = 2 To x
        z = z * i
    Next i
    Return (z)
End Function

Function CombBig(Byval x As Long, Byval y As Long) As Double
    If y > x Then
        Return (0)
    Elseif x = y Then
        Return (1)
    Else
        If x - y < y Then y = x - y
        Return (PermBig(x, y) / FactBig(y))
    End If
End Function

Dim As Long i, j
Print "-- Long Integer - Permutations - from 1 to 12"
For i = 1 To 12
    For j = 1 To i
        Print "P(" & i & "," & j & ")=" & Str(PermBig(i, j)) & "  ";
    Next j
    Print ""
Next i

Print Chr(10) & "-- Float integer - Combinations from 10 to 60"
For i = 10 To 60 Step 10
    For j = 1 To i Step i \ 5
        Print "C(" & i & "," & j & ")=" & Str(CombBig(i, j)) & "  ";
    Next j
    Print ""
Next i

Print Chr(10) & "-- Float integer - Permutations from 5000 to 15000"
For i = 5000 To 15000 Step 5000
    For j = 10 To 50 Step 20
        Print "P(" & i & "," & j & ")=" & Str(PermBig(i, j)) & "  ";
    Next j
    Print ""
Next i

Print Chr(10) & "-- Float integer - Combinations from 200 to 1000"
For i = 200 To 1000 Step 200
    For j = 20 To 100 Step 20
        Print "C(" & i & "," & j & ")=" & Str(CombBig(i, j)) & "  ";
    Next j
    Print ""
Next i
Sleep