bad_alloc in C++ - GeeksforGeeks

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

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