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COP 333 0 MIDTERM 2 EXAM WITH COMPLETE SOLUTIONS
1 00% VERIFIED!!
Which of the following declares proper storage for a dynamic array of dynamic c-style strings? a. string myString; b. char* myString; c. string* myString; d. char** myString; - ANSWER>>d. char** myString;
________ is the flag that tells g++ to give a specified name to an executable after linking. a. -g b. -c c. -o d. -e - ANSWER>>c. -o
Which of the following is NOT an Automatic in C++? a. Default Constructor b. Destructor c. Deep Copy Constructor d. Shallow Copy Assignment - ANSWER>>c. Deep Copy Constructor
T/F When construction of an aggregated data member is not specified, the default constructor of that datamember will be used for construction. - ANSWER>>T
T/F MyClass** contents, refers to a dynamically allocated array of one or more MyClass objects. - ANSWER>>F
Section 2: Code Reading (20 points - 5 points each)class Inventory {friend ostream& operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const Weapon& w);Weapon Remove(int i);Weapon& Get(int i);};Inventory::Inventory() {capacity = 3;size = 0;content = new Weapon[capacity];}void Inventory::Add(const Weapon& w) {if(capacity == size) {//sad pathcapacity += 7;Weapon* temp = new Weapon[capacity];for(int i = 0; i < size; i++) {temp[i] = content[i];}delete [] content;content = temp;}//happy pathcontent[size] = w;size++;} How many weapons can be added to the array called "content" when an Inventory object is first created? - ANSWER>>
Section 2: Reading Code (20 points - 5 points a piece)class Inventory {friend ostream&
operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const Weapon& w);Weapon Remove(int i);Weapon& Get(int i);};Inventory::Inventory() {capacity = 3;size = 0;content = new Weapon[capacity];}void Inventory::Add(const Weapon& w) {if(capacity == size) {//sad pathcapacity += 7;Weapon* temp = new Weapon[capacity];for(int i = 0; i < size; i++) {temp[i] = content[i];}delete [] content;content = temp;}//happy pathcontent[size] = w;size++;} After the maximum number of Weapon objects in content is reached, how many more are added to the contentarray? - ANSWER>>
Section 2: Reading Code (20 points - 5 points a piece)class Inventory {friend ostream& operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const Weapon& w);Weapon Remove(int i);Weapon& Get(int i);};Inventory::Inventory() {capacity = 3;size = 0;content = new Weapon[capacity];}void Inventory::Add(const Weapon& w) {if(capacity == size) {//sad pathcapacity += 7;Weapon* temp = new Weapon[capacity];for(int i = 0; i < size; i++) {temp[i] = content[i];}delete [] content;content = temp;}//happy pathcontent[size] = w;size++;} What is the first declaration in the public section of the Inventory class declaration? - ANSWER>> The inventory destructor
Section 2: Reading Code (20 points - 5 points a piece)class Inventory {friend ostream& operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const Weapon& w);Weapon Remove(int i);Weapon& Get(int i);};Inventory::Inventory() {capacity = 3;size = 0;content = new Weapon[capacity];}void Inventory::Add(const Weapon& w) {if(capacity == size) {//sad pathcapacity += 7;Weapon* temp = new Weapon[capacity];for(int i = 0; i < size; i++) {temp[i] = content[i];}delete [] content;content = temp;}//happy pathcontent[size] = w;size++;} What would the usage of the function marked (in comments) with question number 39 look like? - ANSWER>>Inventory inv1;
Inventory inv2 = inv1;
Section 2: Reading Code (20 points - 5 points a piece)class Inventory {friend ostream& operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const
size--;
Return returnW;
}
Section 2: Reading Code (20 points - 5 points a piece)class Inventory {friend ostream& operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const Weapon& w);Weapon Remove(int i);Weapon& Get(int i);};Inventory::Inventory() {capacity = 3;size = 0;content = new Weapon[capacity];}void Inventory::Add(const Weapon& w) {if(capacity == size) {//sad pathcapacity += 7;Weapon* temp = new Weapon[capacity];for(int i = 0; i < size; i++) {temp[i] = content[i];}delete [] content;content = temp;}//happy pathcontent[size] = w;size++;} Implement the insertion operator overload for Inventory that prints all weapons in the inventorypreceded by the index of that weapon. For example, the 2nd weapon should be printed as: "1. where<wea - ANSWER>>ostream& operator<< (ostream& o, const Inventory& inv) {
for(int i = 0; i < inv.size; i ++) {
o << i << ". " << inv.contents[i] << endl;
}
return o;
}
Section 2: Reading Code (20 points - 5 points a piece)class Inventory {friend ostream& operator<<(ostream& o, const Inventory& i);private:Weapon* content;int capacity, size;public:~Inventory(); //Question number 38Inventory(const Inventory& i); //Question number 39Inventory();Inventory& operator=(const Inventory& i);void Add(const Weapon& w);Weapon Remove(int i);Weapon& Get(int i);};Inventory::Inventory() {capacity = 3;size = 0;content = new Weapon[capacity];}void Inventory::Add(const Weapon& w) {if(capacity == size) {//sad pathcapacity += 7;Weapon* temp = new Weapon[capacity];for(int i = 0; i < size; i++) {temp[i] = content[i];}delete [] content;content = temp;}//happy pathcontent[size] = w;size++;} Give the declaration of a
- operator overload that returns the result of concatenating the contents of one Inventory with the contents of another Inventory. - ANSWER>>Inventory Inventory::operator+(const Inventory& inv) {
Inventory retInv;
retInv.size = 0;
retInv.capacity = capacity + inv.capacity;
//note that you only have to do this delete if we assume that the default constructor
// allocates default space
delete [] retInv.content;
retInv.content = new Weapon[retInv.capacity];
for(int i = 0; i < size; i++) {
retInv.content[i] = content[i];retInv.size++;
}
for(int i = 0; i < inv.size; i++) {
retInv.content[retInv.size + i] = inv.content[i];
retInv.size++;
}
return retInv;
}
Bonus (5 points): Given a dynamic array of Shapes called myShapes of size 10 provide the algorithm for resizing the array to size 25. - ANSWER>>Shape* myShapes = new Shape[10];Shape* temp = new Shape[15];for(int i = 0; i < 10; i++) {
temp[i] = myShapes[i];
}
delete [] myShapes;
myShapes = temp;
_________ is an object-oriented programming that depicts a "has a" relationship between two classes. a. Interface b. Inheritance c. Aggregation d. CRUD - ANSWER>>c. Aggregation
To prevent the creation of a copy, an object may be passed into a function by ______ a. Value b. Reference c. Name d. Constructor - ANSWER>>b. Reference
n C++, ______ is the second phase of compilation and takes object code files to generate an executable. a. Linking b. Compilation c. Declaration d. Overriding - ANSWER>>a. Linking
T/F A copy constructor should be provided for a class when DMA is used. - ANSWER>>T
T/F Multiple class definitions can be put in a single header file. - ANSWER>>T
T/F A copy constructor should take two parameters by value. - ANSWER>>F
T/F The "this" keyword can be used in a friend function. - ANSWER>>F
T/F C++ classes can only have data members that are built-in types. - ANSWER>>F
T/F To be a resizable array in C++ it has to be located on the stack. - ANSWER>>F
T/F A copy constructor should always take a parameter by reference. - ANSWER>>T
T/F When returning an object by reference, the value is copied before returning from the function. - ANSWER>>F
T/F All pointers point to heap space. - ANSWER>>F
T/F The delete keyword can be used on an unallocated address in heap space. - ANSWER>>F
T/F Only arrays may be dynamically allocated. - ANSWER>>F
T/F The ampersand (&) operator returns a memory address to stack space. - ANSWER>>F
T/F The new keyword returns a pointer to safe heap space. - ANSWER>>T
T/F Statically allocated variables must be deleted with the "delete" keyword before they go out of scope. - ANSWER>>F
T/F Constructors and destructors are needed to declare for all classes - ANSWER>>F
T/F The expression *myPtr gives the address myPtr is stored at. - ANSWER>>F
T/F The expression delete [] myArray will deallocate the pointers stored in myArray, and the pointer myArray itself. - ANSWER>>F
T/F Statically allocated variables assigned to a dynamically allocated list will not fall out of scope until thearray is deallocated. - ANSWER>>F
