oBFusCATed...I found the proble, is a nonsense, is very simple, the name of the file is wrong, i saved the file with this name, Exercise 2 of 02/04/09 and i continued to write the code,when i completed the program i used the debug and automatically the gdb.exe created a link from the name of the program to the library of gdb, but the library of gdb not accept some symbols like - or / as in my case. I have noticed because i download another program for the c++language, the NetBeans IDE, i used the same name of the file and i do the program, but when i go to use the debug was written that there was a linking problem from the file to the gdb, I thought that the problem could be generated from the non-recognition of certain symbols,i changed the name of the file and now everything is ok, perfect i'm an idiot!!!
I apologize and thank you for help and patience that you had, i apologize also for my bad English, i'm Italian and i don't speak English wery well. Thank you and have a nice day!