Define a class to overload the method perform as follows:

double perform (double r, double h) — to calculate and return the value of curved surface area of cone

$CSA = \pi rl \quad l = \sqrt{r^2 + h^2}$

void perform (int r, int c) — Use NESTED FOR LOOP to generate the following format

r = 4, c = 5

output
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5

void perform (int m, int n, char ch) — to print the quotient of the division of m and n if ch is Q else print the remainder of the division of m and n if ch is R

Method which reverses a given number is:

1. Impure method
2. Pure method
3. Constructor
4. Destructor