EECS 280 Lecture Notes - Lecture 22: Null Pointer, Interrupt, Error Detection And Correction
13 Dec 2018
School
Course
Professor
Document Summary
We"re only going to be talking about exceptions in c++ We want to nd a way to detect errors at runtime. We will use exceptions to separate error detection and error corrections into two parts of the program. Let"s say, for example, that we have a problem: in our factorial function, we can"t have an input that it"s a negative number. Instead of having a requires clause, we could look at it in a different way, and do runtime checking. There are three general strategies: solve the problem. Try to x things by modifying code or returning default outputs (i. e. return 1): crash the program. Use abort() or exit(): pass the problem to someone else. C++ exceptions let us detect an error in one part of the program and correct it in a different part of the program. We could detect an error in factorial() but correct it in main(). Throw the error, and someone else can catch it.
