[Dev-C++] redeclaration of built in type 'bool'

[Mux0x55 o. a u. <mu...@gm...>]

Good evening @ all,
I have a big problem. I want to use DevCpp to compile C progs only, but I
can't compile because it gives me this compilation error: "redeclaration of
built in type bool". How can I solve the problem? Is there a method to
disable c++ compiler ? Help me please. I'm a student of IT Engineering and
I'm using the Roberts library of  "Programming with abstractions in  C"  .
I  have to use the devCpp and I have to use these libraries. Help me again.
Thank You.