Final answer:
To overload the -, >, and -- operators for the class Demo12, you define the operators as friend functions within the class. For the minus operator, you compute the difference of the member variables and return a new object; the greater-than operator compares member variables and returns a boolean; the pre-decrement operator decrements each member variable by one.
Step-by-step explanation:
To overload operators in a C++ class, we typically provide special member functions or friend functions that define the behavior of the operator for the class objects. In the context of the class Demo12 of example M5, we can overload the - (minus), > (greater than), and pre-decrement (--) operators by implementing them as friend functions.Here's how you could overload these operators:class Demo12 {public: int value; // Other member variables and functions friend Demo12 operator-(const Demo12& lhs, const Demo12& rhs) { // Implement the subtraction operation } friend bool operator>(const Demo12& lhs, const Demo12& rhs) { // Implement the greater than comparison } friend Demo12& operator--(Demo12& obj) { // Implement the pre-decrement operation }};To overload the - (minus) operator, you define a function that takes two Demo12 objects as parameters, computes the difference of the member variables and returns a new Demo12 object with these differences.
The > (greater than) operator function takes two Demo12 objects and returns a boolean value after comparing the corresponding member variables. Lastly, for the pre-decrement -- operator, you provide a function that decrements each member variable by one and returns the modified object.The class Demo12 needs to be defined with overloaded operators - (minus), > (greater than), and pre-decrement - - as friend functions. The - operator should return an object with the difference of the corresponding member variable values of the first and second operands. The > operator should return true if the values of the first operand's member variables are greater than the second operand's corresponding member variable values, and false otherwise. The - - operator should decrement the value of each member variable of its object operand and return the object.