Is it right to use new operator inside C++ constructor?

Question

class test{

  int value;

};

class sample{

  sample(){

    test *var = new test();

  }

};



int main(){

  sample foo;

  //what will happen here if sample constructor fails to allocate its memory?

}

Is it right to use the

new

operator inside a C++ constructor?
What will happen here if the

sample

constructor fails to allocate its memory?

Answer 1

what will happen here if sample constructor fails to allocate a memory?

It will throw a std::bad_alloc exception and can be sanitized in main() by catching it:

int main() {
    try {
       sample foo;

        // Work with foo ...
    }
    catch(const std::bad_alloc& ba) {
        std::err << "Not enough memory available. Caught 'bad_alloc' exception: '" 
                 << ba.what() << "'" << std::endl;
    }
}

Is it right to use new operator inside C++ constructor?

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