int x //x coord of the center -int y // y coord of the center -int radius -static int count // static variable to keep count of number of circles created + Circle() //default constructor that sets origin to (0,0) and radius to 1 +Circle(int x, int y, int radius) // regular constructor +getX(): int +getY(): int +getRadius(): int +setX(int newX: void +setY(int newY): void +setRadius(int newRadius):void +getArea(): double // returns the area using formula pi*r^2 +getCircumference // returns the circumference using the formula 2*pi*r +toString(): String // return the circle as a string in the form (x,y) : radius +getDistance(Circle other): double // * returns the distance between the center of this circle and the other circle +moveTo(int newX,int newY):void // * move the center of the circle to the new coordinates +intersects(Circle other): bool //* returns true if the center of the other circle lies inside this circle else returns false +resize(double scale):void// * multiply the radius by the scale +resize(int scale):Circle // * returns a new Circle with the same center as this circle but radius multiplied by scale +getCount():int //returns the number of circles created //note that the resize function is an overloaded function. The definitions have different signatures Data file: 0 0 4 0 0 6 - 2 -9 6 4 5 7 7 8 9 Extend the driver class to do the following: Declare a vector of circles Call a function with signature inputData(vector &, string filename) that reads data from a file called dataLab4.txt into the vector. The following c-e are done in this function Use istringstream to create an input string stream called instream. Initialize it with each string that is read from the data file using the getline method. Read the coordinates for the center and the radius from instream to create the circles Include a try catch statement to take care of the exception that would occur if there was a file open error. Display the message “File Open Error” and exit if the exception occurs Display all the circles in this vector using the toString method Use an iterator to iterate through the vector to display these circles Display the count of all the circles in the vector using the getCount method Display the count of all the circles in the vector using the vector size method Clear the vector Create a circle called c using the default constructor Display the current count of all the circles using the getCount method on c Display the current count of all the circles using the vector size method Write functions in your main driver cpp file that perform the actions b-l. Your code should be modular and your main program should consist primarily of function calls

int x //x coord of the center -int y // y coord of the center -int radius -static int count // static variable to keep count of number of circles created + Circle() //default constructor that sets origin to (0,0) and radius to 1 +Circle(int x, int y, int radius) // regular constructor +getX(): int +getY(): int +getRadius(): int +setX(int newX: void +setY(int newY): void +setRadius(int newRadius):void +getArea(): double // returns the area using formula pir^2 +getCircumference // returns the circumference using the formula 2pir +toString(): String // return the circle as a string in the form (x,y) : radius +getDistance(Circle other): double // returns the distance between the center of this circle and the other circle +moveTo(int newX,int newY):void // * move the center of the circle to the new coordinates +intersects(Circle other): bool //* returns true if the center of the other circle lies inside this circle else returns false +resize(double scale):void// * multiply the radius by the scale +resize(int scale):Circle // * returns a new Circle with the same center as this circle but radius multiplied by scale +getCount():int //returns the number of circles created //note that the resize function is an overloaded function. The definitions have different signatures Data file: 0 0 4 0 0 6 - 2 -9 6 4 5 7 7 8 9 Extend the driver class to do the following: Declare a vector of circles Call a function with signature inputData(vector &, string filename) that reads data from a file called dataLab4.txt into the vector. The following c-e are done in this function Use istringstream to create an input string stream called instream. Initialize it with each string that is read from the data file using the getline method. Read the coordinates for the center and the radius from instream to create the circles Include a try catch statement to take care of the exception that would occur if there was a file open error. Display the message “File Open Error” and exit if the exception occurs Display all the circles in this vector using the toString method Use an iterator to iterate through the vector to display these circles Display the count of all the circles in the vector using the getCount method Display the count of all the circles in the vector using the vector size method Clear the vector Create a circle called c using the default constructor Display the current count of all the circles using the getCount method on c Display the current count of all the circles using the vector size method Write functions in your main driver cpp file that perform the actions b-l. Your code should be modular and your main program should consist primarily of function calls

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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-int x //x coord of the center

-int y // y coord of the center

-int radius

-static int count // static variable to keep count of number of circles created

+ Circle() //default constructor that sets origin to (0,0) and radius to 1

+Circle(int x, int y, int radius) // regular constructor

+getX(): int

+getY(): int

+getRadius(): int

+setX(int newX: void

+setY(int newY): void

+setRadius(int newRadius):void

+getArea(): double // returns the area using formula pi*r^2

+getCircumference // returns the circumference using the formula 2*pi*r

+toString(): String // return the circle as a string in the form (x,y) : radius

+getDistance(Circle other): double // * returns the distance between the center of this circle and the other circle

+moveTo(int newX,int newY):void // * move the center of the circle to the new coordinates

+intersects(Circle other): bool //* returns true if the center of the other circle lies inside this circle else returns false

+resize(double scale):void// * multiply the radius by the scale

+resize(int scale):Circle // * returns a new Circle with the same center as this circle but radius multiplied by scale

+getCount():int //returns the number of circles created

//note that the resize function is an overloaded function. The definitions have different signatures

Data file:
0 0 4
0 0 6
- 2 -9 6
4 5 7
7 8 9

Extend the driver class to do the following:
1. Declare a vector of circles
2. Call a function with signature inputData(vector<Circle> &, string filename) that reads data from a file called dataLab4.txt into the vector. The following c-e are done in this function
3. Use istringstream to create an input string stream called instream. Initialize it with each string that is read from the data file using the getline method.
4. Read the coordinates for the center and the radius from instream to create the circles
5. Include a try catch statement to take care of the exception that would occur if there was a file open error. Display the message “File Open Error” and exit if the exception occurs
6. Display all the circles in this vector using the toString method
7. Use an iterator to iterate through the vector to display these circles
8. Display the count of all the circles in the vector using the getCount method
9. Display the count of all the circles in the vector using the vector size method
10. Clear the vector
11. Create a circle called c using the default constructor
12. Display the current count of all the circles using the getCount method on c
13. Display the current count of all the circles using the vector size method

Write functions in your main driver cpp file that perform the actions b-l. Your code should be modular and your main program should consist primarily of function calls

./main
The circles created are:
(0,0):4
(0,0):6
(-2,-9):6
(4,5):7
(7,8):9
The number of circles, using getCount method is 5
The number of circles, using vetor size method is 5
Erasing the Vector of Circles
Creating a new Circle
The number of circles, using getCount method is 6
The number of circles remaining is 0

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