C++ exceptions use the try, catch and throw keywords.A throw expression signals the error or exceptional condition. You can use an object of any type as the operand of a throw expression. This object is typically used to convey information about the error. Typically, you should use the std::exception class or one of the derived classes that are defined in the standard library, or if none of those are appropriate, then derive your own exception class from std::exception.A try block encloses one or more statements that might throw an exception.One or more catch blocks immediately follow a try block. Each catch block specifies the type of exception it can handle.The following syntax shows an example try block and its handlers. Assume that GetNetworkResource() acquires data over a network connect, and that the two exception types are user-defined classes that derive from std::exception Note that the exceptions are passed by reference in the catch statement:MyData md;try { // code that could throw an exception md = GetNetworkResource();}catch (networkIOException& e) { // code that executes when an exception of type // networkIOException is thrown in the try block//…// Log error message in the exception object. cerr << e.what();}catch (myDataFormatException& e) { // code that handles another exception type//… cerr << e.what();}// The following syntax shows a throw expression:MyData GetNetworkResource(){ //... if(IOSuccess == false) throw networkIOException("Unable to connect"); //... if(readError) throw myDataFormatException("Format error"); // ...} C++
Topic: Exceptions
Explain about try, catch, and throw Statements (C++) ?
Browse random answers:
What is Exceptions in c++ ?
Can we generate a C++ source code from the binary file?
what is Un handled exception(KERNEL32.DLL):0xE06D7363 in the context of exception handling? pls answer to my mail id.in the flg code i got a problem.i want to know the entire steps followed in exception handling in this program.#include <iostream>using namespace std;int main(){ cout << "Start"; try { // start a try block cout << "Inside try block"; cout << "Still inside try block"; throw 78; } catch (double i) { // catch an error cout << "Caught an exception -- value is: "; cout << i << ""; } cout << "End"; return 0;}
How does throwing and catching exceptions differ from using setjmp and longjmp?
what is the difference betwen wait() and delay()?
How can I get around scope problems in a try/catch?
Explain exception specifications with example ?
Explain about standard exceptions with example ?
Explain about try, catch, and throw Statements (C++) ?
Exceptions are hard to ignore, unlike error codes. ?
What are C++ Exception Examples ?
Explain about Unhandled C++ Exceptions ?
Explain about exception Handling Overhead ?
Explain about Mixing C (Structured) and C++ Exceptions ?
Explain about Overview of C++ Exception Handling with example ?
Explain about Implications of Using Exceptions with example ?
Explain about Designing With Exceptions with example ?
Explain about exceptions in Real-Time Systems ?
Explain about exception Handling Philosophies with example ?
Explain about exceptions in an Array-Based Stack ?
How many exceptions in a List-Based Stack ?
What are some ways try / catch / throw can improve software quality?
How do exceptions simplify my function return type and parameter types?
What does it mean that exceptions separate the "good path" (or "happy path") from the "bad path"?
Exception handling seems to make my life more difficult; clearly I'm not the problem, am I??
How can I handle a destructor that fails?
How can I handle a constructor that fails?
How should I handle resources if my constructors may throw exceptions?
What is exception-safe code?
Explain about exception Neutrality ?
Explain how we implement exception handling in C++
Explain terminate() and unexpected() function ?
Exception handling concept ?
Describe the way to handle run time error in C++.
