(C++ Builder) Get the extension of a filename

include <assert>     //For assert

include <System.hpp> //For String


String getExtension(const String& fileName)
{
  const int index = fileName.Length()-2;
  const int count = 3;
  return fileName.SubString(index,count);
}
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  const String fileName = "autoexec.bat";
  assert( getExtension(fileName)  == "bat");
}

Other code snippets

Code links

• #include
• assert
• const
• #include
• int
• return
• Sender
• String
• TForm1
• TObject
• void