coord_pair

Objective

Implement coord_pair, a compact C++98 class for a pair of integer coordinates.

Steps

Create coord_pair.hpp and coord_pair.cpp.
Expose a class named coord_pair with canonical construction, copy, assignment, and destruction.
A default-constructed value is {0, 0}.
A value can be constructed from two int coordinates.
Support operator[] for indexes 0 and 1; both const and mutable access are required.
Support unary minus, +, -, * by an integer scalar on either side, and the corresponding +=, -=, *= operators.
Support prefix and postfix ++ and --; they apply to both coordinates.
Support == and !=.
Print values with operator<< as {x, y}.

examples

$ std::cout << (coord_pair(3, -2) + coord_pair(4, 5)) << "\n";

{7, 3}

$ std::cout << (2 * coord_pair(-1, 6)) << "\n";

{-2, 12}

Constraints

Expected files

coord_pair.hppcoord_pair.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

Tests

Run the tests to grade your code

Build

01Default constructor yields {0, 0}

02Constructs from two coordinates

03Copy constructor duplicates the value

04Assignment copies both coordinates

05const operator[] reads each coordinate

06mutable operator[] writes each coordinate

07operator+ adds component-wise

08operator- subtracts component-wise

09unary operator- negates both coordinates

10operator* scales when pair is on the left (pair * int)

11operator* scales when scalar is on the left (int * pair)

12operator+= adds in place

13operator-= subtracts in place

14operator*= scales in place

15prefix ++ returns the incremented pair

16postfix ++ returns the old value, then increments

17prefix -- returns the decremented pair

18postfix -- returns the old value, then decrements

19operator== is true for identical pairs

20operator== is false when a coordinate differs

21operator!= is true when a coordinate differs

22operator!= is false for identical pairs

coord_pair

Objective

Implement coord_pair, a compact C++98 class for a pair of integer coordinates.

Steps

Create coord_pair.hpp and coord_pair.cpp.
Expose a class named coord_pair with canonical construction, copy, assignment, and destruction.
A default-constructed value is {0, 0}.
A value can be constructed from two int coordinates.
Support operator[] for indexes 0 and 1; both const and mutable access are required.
Support unary minus, +, -, * by an integer scalar on either side, and the corresponding +=, -=, *= operators.
Support prefix and postfix ++ and --; they apply to both coordinates.
Support == and !=.
Print values with operator<< as {x, y}.

examples

$ std::cout << (coord_pair(3, -2) + coord_pair(4, 5)) << "\n";

{7, 3}

$ std::cout << (2 * coord_pair(-1, 6)) << "\n";

{-2, 12}

Constraints

Expected files

coord_pair.hppcoord_pair.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

coord_pair

Objective

Implement coord_pair, a compact C++98 class for a pair of integer coordinates.

Steps

Create coord_pair.hpp and coord_pair.cpp.
Expose a class named coord_pair with canonical construction, copy, assignment, and destruction.
A default-constructed value is {0, 0}.
A value can be constructed from two int coordinates.
Support operator[] for indexes 0 and 1; both const and mutable access are required.
Support unary minus, +, -, * by an integer scalar on either side, and the corresponding +=, -=, *= operators.
Support prefix and postfix ++ and --; they apply to both coordinates.
Support == and !=.
Print values with operator<< as {x, y}.

examples

$ std::cout << (coord_pair(3, -2) + coord_pair(4, 5)) << "\n";

{7, 3}

$ std::cout << (2 * coord_pair(-1, 6)) << "\n";

{-2, 12}

Constraints

Expected files

coord_pair.hppcoord_pair.cpp

Allowed functions

None. Write every helper yourself.

Allowed headers

iostreamstream output

Tests

Run the tests to grade your code

Build

01Default constructor yields {0, 0}

02Constructs from two coordinates

03Copy constructor duplicates the value

04Assignment copies both coordinates

05const operator[] reads each coordinate

06mutable operator[] writes each coordinate

07operator+ adds component-wise

08operator- subtracts component-wise

09unary operator- negates both coordinates

10operator* scales when pair is on the left (pair * int)

11operator* scales when scalar is on the left (int * pair)

12operator+= adds in place

13operator-= subtracts in place

14operator*= scales in place

15prefix ++ returns the incremented pair

16postfix ++ returns the old value, then increments

17prefix -- returns the decremented pair

18postfix -- returns the old value, then decrements

19operator== is true for identical pairs

20operator== is false when a coordinate differs

21operator!= is true when a coordinate differs

22operator!= is false for identical pairs