There are ways, but they aren't simple
Like arthurprs said: It is not possible to use C++ code inlined in delphi code.

You can use a C++ compiler to compile your C++ code into an
object. Then you can link this object with your pascal-program
(there are some tutorials how you do that with freepascal, if I remember
correctly).

The other way is compiling a shared library with C++ (.so or .dll). Then
you can use this library in Pascal (either dynamically or via "external").