Circles (1) P84786


Statement
 

pdf   zip   main.cc

thehtml

To solve this exercise you will need the definition of Point and distance() of problem P46254.

Write a procedure

void move(Point& p1, const Point& p2);

that moves the point p1 according to the coordinates indicated by the point p2.

For instance, being p1 the point (2, 1), and p2 the point (−0.5, 4). Then move(p1, p2) would do that p1 was (1.5, 5).

Additionally, using the definition

struct Circle { Point center; double radius; };

write two procedures,

void scale(Circle& c, double sca);

that scales the circle c proportionately to the real strictly positive sca, and

void move(Circle& c, const Point& p);

that moves the circle c according to the coordinates indicated by p.

For instance, being c a circle of center (1, 2) and radius 3. Then, scale(c, 2) would obtain a circle of center (1, 2) and radius 6. However, if p is (3.5, −1), move(c, p) would obtain a circle of center (4.5, 1) and radius 3.

Write also a function that prints if a point p is inside a circle c:

bool is_inside(const Point& p, const Circle& c);

Suppose that the radii are always strictly positive, and that p will never be exactly in the border of c.

Observation You only need to submit the required classes; your main program will be ignored. Strictly obey the type definitions of the statement.

Information
Author
Salvador Roura
Language
English
Translator
Carlos Molina
Original language
Catalan
Other languages
Catalan
Official solutions
C++
User solutions
C++