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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 shoul 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 int *x, *y = nullptr, *z = nullptr; 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 shoul 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 int *x, *y = nullptr, *z = nullptr; x = new int (2); try { // allocating memory for y throws badalloc below allocate3(x, y, z); } catch (bad_alloc) { } cout <« *x « endl; // prints 2

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question 11 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 shoule 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 int *x, *y = nullptr, *z = nullptr; x = new int (2); try { // allocating memory for y throws badalloc below allocate3(x, y, z); } catch (bad_alloc) { } cout << *x « endl; // prints 2
Transcribed Image Text:Question 11 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 shoule 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 int *x, *y = nullptr, *z = nullptr; x = new int (2); try { // allocating memory for y throws badalloc below allocate3(x, y, z); } catch (bad_alloc) { } cout << *x « endl; // prints 2
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