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
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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