bad_alloc in C++

Prerequisite : Exceptions in C++

Standard C++ contains several built-in exception classes. The most commonly used is bad_alloc, which is thrown if an error occurs when attempting to allocate memory with new.

This class is derived from exception.

To make use of bad_alloc, one should set up the appropriate try and catch blocks. Here’s a short example, that shows how it’s used :

C++

// CPP code for bad_alloc
#include <iostream>
#include <new>

// Driver code
int main () {
  try
  {
     int* gfg_array = new int[100000000];
  }
  catch (std::bad_alloc & ba)
  {
     std::cerr << "bad_alloc caught: " << ba.what();
  }
  return 0;
}

RunTime error :

bad_alloc caught: std::bad_alloc