CSI 250L Lab 5 Solution, Spring 2012

American University of Science & Technology Department Of Computer Science CSI 250L – Computer Programming-II Lab Spring 2011/2012 Lab Work 5 Problem 3: Create a Polygon class that stores the Cartesian coordinates of the four points.  The constructor accepts four sets of coordinates and verifies that each of these is in the first quadrant with no single x- or y-coordinate larger than 20.0. These coordinates should be stored in private data members.  Provide set, get and print functions. #include <iostream> using namespace std; class Polygon { private: int p1x, p1y; int p2x, p2y; public: Polygon(); Polygon(int, int, int, int); void setp1x(int); void setp1y(int); int getp1x(); int getp1y(); void setp2x(int); void setp2y(int); int getp2x(); int getp2y(); void print(); }; Polygon::Polygon() { p1x = p1y = p2x = p2y = 0; } Polygon::Polygon(int x1, int y1, int x2, int y2) { 1 if (x1<=20) setp1x(x1); else {cout << "Invalid x-coordinate for the first point!"<<endl;p1x=0;} if (y1<=20) setp1y(y1); else {cout << "Invalid y-coordinate for the first point!"<<endl;p1y=0;} if (x2<=20) setp2x(x2); else {cout << "Invalid x-coordinate for the second point!"<<endl;p2x=0;} if (y2<=20) setp2y(y2); else {cout << "Invalid y-coordinate for the second point!"<<endl;p2y=0;} } void Polygon::setp1x(int x) { if (x<=20) p1x = x; else {cout << "Invalide x-coordinate for the first point!" << endl;p1x=0;} } void Polygon::setp1y(int y) { if (y<=20) p1y = y; else {cout << "Invalide y-coordinate for the first point!" << endl;p1y=0;} } int Polygon::getp1x() { return p1x; } int Polygon::getp1y() { return p1y; } void Polygon::setp2x(int x) { if (x<=20) p2x = x; else {cout << "Invalide x-coordinate for the second point!" << endl;p2x=0;} } void Polygon::setp2y(int y) { if (y<=20) p2y = y; else {cout << "Invalide y-coordinate for the second point!" << endl;p2y=0;} } int Polygon::getp2x() { return p2x; } 2 int Polygon::getp2y() { return p2y; } void Polygon::print() { cout << "The four coordinates of the polygon are : " << endl; cout << "Point 1 : ( " << getp1x() << ", " << getp1y() << ")" << endl; cout << "Point 2 : ( " << getp2x() << ", " << getp2y() << ")" << endl; } int main() { int x1, y1, x2, y2; cout << "Please enter the four coordinates of the first polygon : " << endl; cin >> x1 >> y1 >> x2 >> y2; Polygon p1; p1.setp1x(x1); p1.setp1y(y1); p1.setp2x(x2); p1.setp2y(y2); p1.print(); cout << "\nPlease enter the four coordinates of the second polygon : " << endl; cin >> x1 >> y1 >> x2 >> y2; Polygon p2(x1, y1, x2, y2); p2.print(); system("pause"); return 0; } 3 Problem 4: Write the class definitions and implementations for the following class specifications. Use separate files for the definition and implementation. Staff Attributes  ID: an integer to identify each staff.  fname: a string of characters( dynamic allocation).  lname: a string of characters( dynamic allocation).  rank: an integer to classify a staff position. (1,2,3)  BS: a double value for a staff basic salary. Methods  Constructor(default values)  print: a constant function, to print the information about a staff.  Provide set and get functions.  Calculate_salary: compute an employee salary by deducting a tax from the basic salary depending on the rank as follows: 1. for rank 1 a tax of 5% is deducted. 2. for rank 2 a tax of 7% is deducted. 3. for rank 3 a tax of 10% is deducted Write a driver program to create N objects of the class staff and display a menu to do the following: 1. Display a sorted list with respect to staff names. 2. Calculate the total staff salaries. 3. Output the number of staff of rank 1. //Staff.h #ifndef STAFF_H #define STAFF_H class Staff { private: int ID; char *FName; 4 char *LName; int Rank; double BS; public: Staff(int=0, char* ="", char* ="", int=0, double=0.0); ~Staff(); void setID(int); void setFName(char *); void setLName(char *); void setRank(int); void setBS(double); int getID(); char * getFName(); char * getLName(); int getRank(); double getBS(); void print() const; }; #endif 5 //staff.cpp #include "Staff.h" #include <iostream> using namespace std; Staff::Staff(int id, char * fn, char *ln, int r, double bs) { setID(id); setFName(fn); setLName(ln); setRank(r); setBS(bs); } Staff::~Staff() { ID = NULL; delete[] FName; delete[] LName; Rank = NULL; BS = 0.0; } void Staff::setID(int id) { ID = id; } void Staff::setFName(char*n) { FName = new char[strlen(n)+1]; strcpy(FName, n); } void Staff::setLName(char *n) { LName = new char[strlen(n)+1]; strcpy(LName, n); } void Staff::setRank(int r) { Rank = r; } int Staff::getID() { return ID; } void Staff::setBS(double bs) { BS = bs; } char *Staff::getFName() { 6 return FName; } char *Staff::getLName() { return LName; } int Staff::getRank() { return Rank; } double Staff::getBS() { return BS; } void Staff::print() const { cout << "ID = " << ID << ", First Name = " << FName << ", Last Name = " << LName << ", Rank = " << Rank << ", Base Salary = " << BS << endl; } //driver program #include "Staff.h" #include <iostream> using namespace std; int main() { int n; cout << "How many Staff(s) would you like to create?"; cin >> n; Staff *staff = new Staff[n]; int id; char fname[100]; char lname[100]; int rank; double bs; for (int i=0;i<n;i++) { cout << "Enter Staff's ID:"; cin >> id; cout << "Enter Staff's first name:"; cin >> fname; cout << "Enter Staff's last name:"; cin >> lname; cout << "Enter Staff's rank:"; cin >> rank; 7 cout << "Enter Staff's basic salary:"; cin >> bs; staff[i].setID(id); staff[i].setFName(fname); staff[i].setLName(lname); staff[i].setRank(rank); staff[i].setBS(bs); } Staff tempstaff; for (int i=0;i<n;++i) for (int j=0;j<n-1;++j) if (strcmp(staff[j].getLName(), staff[j+1].getLName())>0) { tempstaff = staff[j]; staff[j] = staff[j+1]; staff[j+1] = tempstaff; } cout << "After sorting by last Name : "<< endl; for (int i=0;i<n;++i) staff[i].print(); cout << endl; cout << "Printing information about staff whose Rank = 1" << endl; for (int i=0;i<n;++i) if (staff[i].getRank() == 1) staff[i].print(); cout << endl; cout << "Staff Salaries : " ; double totalBS = 0; for (int i=0;i<n;++i) totalBS += staff[i].getBS(); cout << totalBS << endl; system("pause"); return 0; } 8 9