Write a function called // Precondition: p1, p2 and p3 either point // to dynamically created integers or are // equal to nullptr void allocate3(int* &p1, int* &p2, int* &p3) that will dynamically allocate space for three integers initialized to 0. If the pointers already point to dynamic memory, that memory should fırst be deleted. The function should have a strong exception guarantee. If any of the allocations fails by new throwing a bad_alloc exception, the function should also throw that exception after fulfilling its guarantee. int *a, *b = nullptr, *c = nullptr; a = new int (2); allocate3(a, b, c); // a’s previous memory is deleted cout <« *a « *b << *c« endl; // prints 000 nullptr; int *x, *y = nullptr, *z = X = new int (2); try { // allocating memory for y throws badalloc below allocate3(x, y, z); } catch (bad_alloc) { } cout <« *x « endl; // prints 2

Write a function called // Precondition: p1, p2 and p3 either point // to dynamically created integers or are // equal to nullptr void allocate3(int* &p1, int* &p2, int* &p3) that will dynamically allocate space for three integers initialized to 0. If the pointers already point to dynamic memory, that memory should fırst be deleted. The function should have a strong exception guarantee. If any of the allocations fails by new throwing a bad_alloc exception, the function should also throw that exception after fulfilling its guarantee. int a, b = nullptr, c = nullptr; a = new int (2); allocate3(a, b, c); // a’s previous memory is deleted cout <« a « b << c« endl; // prints 000 nullptr; int x, y = nullptr, z = X = new int (2); try { // allocating memory for y throws badalloc below allocate3(x, y, z); } catch (bad_alloc) { } cout <« x « endl; // prints 2

C++ for Engineers and Scientists

4th Edition

ISBN:9781133187844

Author:Bronson, Gary J.

Publisher:Bronson, Gary J.

Chapter13: Structures

Section: Chapter Questions

Problem 5PP

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