在程序设计中，常用下列三种不同的出错处理方式：

　(1) 用exit语句终止执行并报告错误；

　(2) 以函数的返回值区别正确返回或错误返回；

　(3) 设置一个整型变量的函数参数以区别正确返回或某种错误返回。

　

-in program design, often following three different ways to deal with mistakes : (a) terminate with the implementation of the exit statement and report errors; (2) to the function return values to distinguish between right or wrong to return; (3) the installation of an integer variable function parameters to distinguish between right back to return or some mistakes.