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How to Catch All Exceptions in C++?

Last Updated : 23 Jul, 2025

In C++, exceptions are objects that indicate you have an error in your program. They are handled by the try-catch block in C++. In this article, we will learn how to catch all the exceptions in C++.

To catch all kinds of exceptions in our catch block in C++, we can define the catch block using the catch-all clause - catch (...),

try {         
     // code that can raise an exception
     throw ExceptionType("Error message");
 } 
catch(...){
    // catch all type of unknown  exceptions
}

In the following example we have used the catch(...) block to catch all kind of unknown exceptions that might occur during the execution of the program.

// C++ program to illustrate how to catch all exceptions
#include <iostream>
#include <stdexcept>
using namespace std;

int main()
{
    try {
        // Code that can throw exceptions
        int x = 10;
        int y = 0;
        if (y == 0)
            throw runtime_error("Divide by zero exception");
        int result = x / y;
    }
    // catch the excepetion
    catch (const runtime_error& e) {
        // Handle divide by zero exception
        cout << "Exception: " << e.what() << endl;
    }
    // Handle all other types of exceptions
    catch (...) {

        cout << "An unknown exception occurred" << endl;
    }

    return 0;
}

Exception: Divide by zero exception

Time Complexity: O(1)
Auxiliary Space: O(1)

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