Question

Continue with Point class:

a) Copy the previous program to a new file.
b) Overload [] operator, index 0 return x, index 1 return y of Point Object. (Only index 0,1 is valid, else terminate program)
Implement prefix and postfix operator overload for Point object, ++ operator should increase x and y of Point by 1 s.
c) Overload the prefix and postfix ++ operators. Use following main() to test your class.
int main() {
Point a(3, 4);
Cout<Cout<a[0]=1;
a[1]=2;
Cout<Cout<<++a<Cout<Cout<}
Output from given main:
3
4
(1,2)
(2,3)
(2,3)
(2,3)
(3,4)

Answer 1

To overload the [] operator, define a function returning a reference. Implement separate functions for prefix and postfix ++ operators. The prefix operator modifies and returns the object, while the postfix operator creates a copy, modifies the copy, and returns the original object.

Step-by-step explanation:

To overload the [] operator, we need to define a function that returns a reference. We check if the index is valid (0 or 1), and return a reference to either the x or y member variable. To implement prefix and postfix ++ operators, we need to define two separate functions, one for each operator. The prefix operator increases the x and y values of the Point object by 1 and returns the modified object, while the postfix operator first creates a copy of the Point object, increments its x and y values, and then returns the original object.