C/C++代写 - CS52
时间:2020-11-22
Assignment Description Build an integer Vector class defined in namespace CS52 that has similar behavior to std::vector. The integer Vector will have a default constructor, an overloaded constructor, a copy constructor, and over￾loaded operators (e.g. bracket [], assignment = and stream insertion <<). Use C++’s object oriented programming constructs like classes and resource management that relies on constructors and destructors for memory management. Refer to the interface described on page 2 of this handout for the Vector class declaration. Include your name, your student id, the assignment number, the submission date, and a program descrip￾tion in comments at the top of your A04.cpp file. As in previous assignments use the CS52 Programming Guide for coding style guidance. Where to do the assignment You can do this assignment on your own computer, or using the SMC Virtual labs with Citrix. Due to COVID-19 the campus labs are closed for in person usage. Ensure the code compiles and runs on Windows. Name your program (file) ’A04.cpp’ for full credit. Do not use any other name or else points will be deducted. Submitting the Assignment Submit the assignment on Canvas (https://signon.smc.edu) by uploading your program file to the Assignment 4 entry. Go to your Dashboard and to the CS 052 Assignments page. Upload the file containing your program as an attachment. Do not cut-and-paste your program into a text window. Do not hand in a screenshot of your program’s output. Do not hand in a text file containing the output of your program. Submit the A04.cpp file that contains your code. Saving your work Save your work often on a flash-drive or to the cloud (e.g., GoogleDrive, Microsoft OneDrive, Canvas, etc.). Always save a personal copy of your files (e.g. .cpp, .h, etc.). Do your own work Do not distribute this handout. Do not upload to chegg, coursehero, ankitcodinghub, or any other online platform. Do not pay someone to write the code and submit their code as your solution. You are expected to do your own work. Turning in code that is not your own work will result in a referral to Student Judicial Affairs. 2020 ➞ Scott Bishop | Assistant Professor of Computer Science, Santa Monica College 1 Vector Interface namespace CS52 { class Vector { public : Vector (); // Default constructor Vector ( int size , int int_val ); // Overloaded constructor Vector ( const Vector & ); // Copy constructor ~ Vector (); // Destructor // Returns a reference to the element at index i, throws a string if i is out -of - bounds . int & at ( int i ) const throw ( std :: string ); // Returns the allocated storage for the Vector . int capacity () const ; // Erases the elements of the Vector but does not change capacity . void clear (); // Returns pointer to the first element in the Vector . int * data () const ; // If Vector is empty return true , else false . bool empty () const ; // Deletes the element at the end of the vector . void pop_back (); // Add an element to the end of the vector . void push_back ( int element ); // Returns the number of elements in the vector . int size () const ; // Overloaded operators int & operator [] ( int index ); // [] array syntax Vector & operator =( const Vector & ); // copy assignment // Overloaded stream insertion operator friend std :: ostream & operator < <( std :: ostream & , Vector &); private : int _size = 0; int _capacity = 0; int * _data = nullptr ; }; // Vector }// namespace Assignment 4 References: ❼ Refer to string class in Sec. 11.4 of textbook for dynamic memory & OOP resource management. ❼ MSDN STL vector docs and cplusplus.com vector docs ❼ resize docs at cppreference.com and resize docs at microsoft ❼ reserve docs at cppreference.com and reserve docs at microsoft 2020 ➞ Scott Bishop | Assistant Professor of Computer Science, Santa Monica College 2 Example driver code to test functions in the CS52::Vector interface: void info ( CS52 :: Vector & v ){ std :: cout << " Size is: " << v . size () << "\n"; std :: cout << " Capacity is: " << v . capacity () << "\n"; std :: cout << " Contents : "; for (int i = 0; i < v . size (); i ++) { std :: cout << v [ i ] << " "; } std :: cout << "\n"; }// info int main () { // default constructor , push_back , at methods std :: cout << "// default constructor , push_back , at \ nCS52 :: Vector a;\n"; CS52 :: Vector a ; std :: cout << "\na. push_back (10); a. push_back (88)\ n"; a . push_back (10); a . push_back (88); std :: cout << "a.at (0) = 99;\ n"; a . at (0) = 99; info ( a ); //b std :: cout << "\n// overloaded constructor , [] op , at , empty ,\ clear , exception handling : at \ nCS52 :: Vector b (2 ,5);\ n"; CS52 :: Vector b (2 ,5); std :: cout << "b is " << b << "\n"; std :: cout << "\n// Add more elements to b\n"; std :: cout << "b. push_back (10); b. push_back (2);\ n"; std :: cout << "b. push_back (99); b. push_back ( -5);\n"; b . push_back (10); b . push_back (2); b . push_back (99); b . push_back ( -5); std :: cout << "\n// array index [] and at ()\n"; std :: cout << "b[0] = 25; b[1] = 1;\n"; b [0] = 25; b [1] = 1; std :: cout << "b.at (0) ; b.at (1) ;\n"; std :: cout << b . at (0) << " " << b . at (1) << "\n"; std :: cout << "\n\n// empty method , size , and capacity \n"; std :: cout << "b. empty () " << ( b . empty () ? " True " : " False ") << "\n"; std :: cout << "b. clear ()\n"; b . clear (); info ( b ); std :: cout << "b. empty () " << ( b . empty () ? " True " : " False ") << "\n"; std :: cout << "\n\n// Exception handling :"; try { std :: cout << "\nb.at (9) = "; std :: cout << b . at (9); } catch ( std :: string msg ) { std :: cerr << "\n" << msg << std :: endl ; } 2020 ➞ Scott Bishop | Assistant Professor of Computer Science, Santa Monica College 3 Example driver code continued: //c std :: cout << "\n// copy constructor , copy assignment , pop_back ,\ \n// capacity , size \ nCS52 :: Vector c(b);\n"; std :: cout << "\n// Add more elements to b\n"; std :: cout << "b. push_back (11); b. push_back (7);\ n"; std :: cout << "b. push_back (3); b. push_back (23);\ n"; b . push_back (11); b . push_back (7); b . push_back (3); b . push_back (23); CS52 :: Vector c ( b ); info ( c ); //d std :: cout << "\n// copy assignment \n"; CS52 :: Vector d ; d = c ; std :: cout << " CS52 :: Vector d = c; " << "\n"; std :: cout << "d is " << d << "\n"; std :: cout << "\n// size vs capacity ()\n"; std :: cout << "d. size () is " << d . size () << "\n"; std :: cout << "d. capacity () is " << d . capacity () << "\n"; std :: cout << "\n// pop_back ()\n"; std :: cout << "d. pop_back ();d. pop_back ();\ n"; d . pop_back (); d . pop_back (); std :: cout << "\n// size vs capacity \n"; std :: cout << "d. size () is " << d . size () << "\n"; std :: cout << "d. capacity () is " << d . capacity () << "\n"; char stop ; std :: cin >> stop ; return 0;} // main 2020 ➞ Scott Bishop | Assistant Professor of Computer Science, Santa Monica College 4 Example test output from code in main above that uses our Vector class: //default constructor, push_back, at CS52::Vector a; a.push_back(10); a.push_back(88) a.at(0) = 99; Size is: 2 Capacity is: 2 Contents : 99 88 //overloaded constructor, [] op, at, empty, clear, exception handling: at CS52::Vector b(2,5); b is 5 5 //Add more elements to b b.push_back(10); b.push_back(2); b.push_back(99); b.push_back(-5); //array index [] and at() b[0] = 25; b[1] = 1; b.at(0) ; b.at(1) ; 25 1 //empty method, size, and capacity b.empty() False b.clear() Size is: 0 Capacity is: 8 Contents : b.empty() True //Exception handling: b.at(9) = out-of-bounds //copy constructor, copy assignment, //pop_back, capacity, size CS52::Vector c(b); //Add more elements to b b.push_back(11); b.push_back(7); b.push_back(3); b.push_back(23); Size is: 4 Capacity is: 8 Contents : 11 7 3 23 2020 ➞ Scott Bishop | Assistant Professor of Computer Science, Santa Monica College 5 Example test output continued: //copy assignment CS52::Vector d = c; d is 11 7 3 23 //size vs capacity() d.size() is 4 d.capacity() is 8 //pop_back() d.pop_back();d.pop_back(); //size vs capacity d.size() is 2 d.capacity() is 8 }
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