Detailed explanation and function of exception handling in C language or C++

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Catalogue

Overview

Exception handling

Exception handling mechanism

The function declaration specifies the exception

Practice

Case one

Case two

Overview

As a programmer who writes Bug professionally and changes bug one day to another week. It is very important to learn how to handle exceptions. We should consider not only the ideal situation where there is no error, but also the situation when there is an error.

Debug can help us find and eliminate errors as soon as possible. Error category:

Grammatical error

Running error

Logic error

Exception handling

When designing the program, various unexpected situations that may occur when the program is running are analyzed in advance, and the corresponding processing methods are customized. Exception handling refers to the handling of runtime errors and other exceptions.

When there is no exception handler, there is an exception and the program can only be terminated. Set the exception handling mechanism, run an exception, the flow of the program will be transferred to the exception handling code segment handling. The user can specify any processing.

Take an example where the divisor is 0:

# include using namespace std;template T Div (T x, T y); int main () {/ / declare variables int x, y; double x1, y1; / / assign cin > > x > > y; cin > > x1 > > y1; / / output quotient cout