Hmmm, you initially said
I mean for example if I wanna make a new programmin language how to make a operator?
which appears to indicate that you are trying to write a completely new language (a fairly major feat in itself).
However I am beinging to get the impression that may be you think you can add an operator to the C (or C++) language. If the later is the case then the simple answer is you can't add operators to languages, or rather that you probably shouldn't, in theory you could do something like get the source for a compiler and modify to include a new operator.
In C you extend the language by adding functions. In C++ you could extend the language by adding functions but on the whole a better approach would be to add classes (object definitions). In C++ you can override most of the existing operators for your new classes should you wish, however you still can't create your own operator.
If you really want to create your own language I would suggest that you start by reading the specifications of some existing languages. Also you should have a clear idea of what improvements your new language would provide over the language it is supposed to replace.
If all you really want to do is implement some operator you perceive to be missing from C/C++ then write a function.
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