VBA How To Merge Two Macros

I have two macros and I would like to assign them both to one button. How to make a connection between these two codes in VBA?
the macro should first sort the columns: A and B and then compare them. Here are two codes that need to be connected:

Sub Sort()
Columns("A:A").Select
Selection.Sort Key1:=Range("A1"), Order1:=xlAscending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom, _
DataOption1:=xlSortNormal
Columns("B:B").Select
Selection.Sort Key1:=Range("B1"), Order1:=xlAscending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom, _
DataOption1:=xlSortNormal
Range("C1").Select
End Sub.................................

When I paste the second code below the "Sort" code, the whole code doesn't work like it should.