在ICC7.14C中還是通不過 !ERROR Function 'putchar' not defined. This is a hardware dependent function, and it is not included in the ICCAVR default library. Please implement this function to match your target requirements. You can find examples of this function under the \examples.AVR directory. Make a copy of a suitable example, add it to your project and modify it if needed. The source code must #include the appropriate C header file (e.g. stdio.h) as it contains the special compiler pragma for 'putchar'.
暈了‘putchar’在‘stdio.h’中,跟375庫也沒關系,就是通不過,