"printpp"是帮助用户调试的一个工具，它相当于C提供的printf函数，但它的输出设备是串口。提供的codeworrior编程范例，旨在通过给出的范例使用户对codeworrior的使用有所了解。--A debugging tool. It is equivalent to the "printf" in C, but its output device is serial port. The sample code is compiled in codewarrior. By using it, users can be more familiar with codewarrior.