41异常的概念 以常规方法处理错误 openFiles if (theFilesOpen) t determine the lenth of the file if (gotTheFileLength)( allocate that much memory if (gotEnoughMemory) I read the file into memory if (readFailed) errorCode=-1 else error Code=-2 felse error Code=-3 felse errorCode=-4 ese errorcode=-54.1 异常的概念 4 以常规方法处理错误 openFiles; if (theFilesOpen) { determine the lenth of the file; if (gotTheFileLength){ allocate that much memory; if (gotEnoughMemory) { read the file into memory; if (readFailed) errorCode=-1; else errorCode=-2; }else errorCode=-3; }else errorCode=-4 ; }else errorCode=-5;