C++ New Library - bad_alloc

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Description

This exception thrown on failure allocating memory and type of the exceptions thrown by the standard definitions of operator new and operator new[] when they fail to allocate the requested storage space.

Following is the declaration for std::bad_alloc.

		
class bad_alloc;

Parameters

none

Return Value

none

Exceptions

No-throw guarantee − this member function never throws exceptions.

Data races

none

Example

In below example for std::bad_alloc.

#include <iostream>
#include <new>
 
int main() {
   try {
      while (true) {
         new int[100000000ul];
      }
   } catch (const std::bad_alloc& e) {
      std::cout << "Allocation failed: " << e.what() << '\n';
   }
}

The output should be like this −

It will throw an exception error