Question

15. Define a class called Point. It has two private data members: x and y with int type; and three public member functions: a constructor, setPoint(int, int) and printPoint0. The constructor initializes the data members to 0. You need to use the operator?: to test whether x and y are positive. If not, assign them to 0. The function printPoint prints the message "(X, Y)" where X and Y are two integers. In the main program, first input the number of points from the keyboard, use new operate to dynamically declare an array of objects whose elements are the same as the input number. Use for loop to prompt the user to enter two integers each time. Finally, print all points the user entered. The possible output is Enter the number of points: 3 Enter two integers: 3 2 Enter two integers: 2 -2 Enter two integers: 0 5 The points you entered are: Point 1: (3, 2) Point 2: (2, 0) Point 3: (0, 5) ter a pont dedane nav prit (

Answer 1

Source Code in C++:

#include <iostream>
using namespace std;

class Point
{
private:
int x,y; //instance variables
public:
Point() //default constructor to instance variables to 0
{
this->x=0;
this->y=0;
}
void setPoint(int x,int y) //setter method to set instance variables
{
this->x=(x<0?0:x);
this->y=(y<0?0:y);
}
void printPoint() //method to print instance variables
{
cout << "(" << this->x << "," << this->y << ")" << endl;
}
};

int main()
{
int n;
cout << "Enter the number of points: "; //input prompt
cin >> n; //input
Point *p=new Point[n]; //dynamically declaring an array of Points
for(int i=0;i<n;i++)
{
int x,y;
cout << "Enter two integers: "; //input prompt
cin >> x >> y; //input
(p+i)->setPoint(x,y); //setting the Point
}
cout << "The points you entered are: " << endl;
for(int i=0;i<n;i++)
{
cout << "Point " << i+1 << ": ";
(p+i)->printPoint(); //printing the Point
}
return 0;
}

Output:

CAUsers Debjit GDocuments pointcpp.exe Enter the nunber of points: 3 nter two integers: 3 2 nter tvo integers: 2-2 nter tuo integers: 5 he points you entered are: Point 1: 3.2> Point 2: 2,0> Point 3: <0.5 Process returned 0 く0x0> execution time Press any key to continue 10.907 s