On Tue, Jul 23, 2019 at 2:28 AM Ali MURAT <alimupas2@xxxxxxxxx> wrote: > from which header file are they(for, while, loops) called? None, they are C language constructs. > can you tell me where they(like the for or while loops) are stored? like > a iostream! The processing of C language constructs can be found in the GCC source tree under C front-end directory: https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/c/ > I wonder their source code. and I'll look(investigate ) at them and try > to write a new header. You mean that you want to write a new language construct that extends the existing C language constructs? -- Best regards, Tadeus