7、It shows appropriate use of some system calls and library functions from c, including fopen, fclose, access, setvbuf, perror, strerror, and popen.
1、The strerror function (see "man strerror") is slightly different.
5、The strerror() function isn't necessarily thread-safe; for unknown values, it formats an error message in a static buffer and returns a pointer to that buffer.
10、POSIX 1003.1標準定義strerror _ r,該函數除接受錯誤值之外,還接受緩衝區中的指針和緩衝區大小。
6、You can simulate this yourself by using a printf call and the strerror function, which returns a pointer to the textual representation of the current errno value.
3、The perror and strerror functions that pull standard error descriptions come from the global variable, sys_errlist.
2、strerror將系統錯誤消息作為字符串返回。
4、Additional calls to strerror will overwrite the contents of that buffer.
9、When an error occurs in a system call, you can access and display a message corresponding to the error in at least one of two ways: by using either the perror or the strerror function.
8、Thus, if the NPV is greater than zero, then the IRR is also greater than the required rate of return.