More About Catch in C++


Description:

An exception is a situation, which occured by the runtime error. In other words, an exception is a runtime error. An exception may result in loss of data or an abnormal execution of program. Exception handling is a mechanism that allows you to take appropriate action to avoid runtime errors.

  • throw − A program throws an exception when a problem shows up. This is done using a throw keyword.
  • catch − A program catches an exception with an exception handler at the place in a program where you want to handle the problem. The catch keyword indicates the catching of an exception.
  • try − A try block identifies a block of code for which particular exceptions will be activated. It's followed by one or more catch blocks.

Assuming a block will raise an exception, a method catches an exception using a combination of the try and catch keywords. A try/catch block is placed around the code that might generate an exception.

Example Program:

Here is the simple program try catch function in C++.

Source Code

#include<iostream>
using namespace std;
int main()
{
    try
    {
        throw 1.8f;
    }
    catch(int e)
    {
        cout<<"Integer Catch : "<<e<<endl;
    }
    catch(float e)
    {
        cout<<"Float Catch : "<<e<<endl;
    }
    catch(...)
    {
        cout<<"All Catch : "<<endl;
    }
    cout<<"End";
    return 0;
}
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Output

Float Catch : 1.8
End

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