---In the below code include a new function called total_area that computes the total surface area of a cylinder. The total surface area is the sum of side area and cross section area. inputting values 2 for r and 10 for h should have the total area be 23.370382 inch-sqr.

In C++

#include

#include

using namespace std;

double PI = 3.14159; // This variable is defined globally, known to all functions in this program as PI

double cross_area(double r); // Function prototype for function cross_area

double side_area(double r, double h); // Function prototype for function Side_area

int main(void)

{

double h, r; //variables local to the main function

cout << "Enter the radius and the height of the cylinder in Cm ";

cin >> r >> h;

cout << endl;

cout << "Before I do any computation or call any function, I want to let you know that ";

cout << "you have entered r = " << r << " and h = " << h << "." << endl;

cout << "I am planning to use inch, thus in the first function, I will convert r, and " << endl;

cout << "in the second one I will convert h ";

cout << "The cross section area of the cylinder is " << cross_area(r) << " inch-sqr"<< endl;

cout << "The side area of the cylinder is " << side_area(r,h) << " inch-sqr ";

return 0;

}

double cross_area(double r)

{

//Cross secion area includes the disks at the bottom and the top

r = r * 0.3937; // converting r to inch

return 2*PI*pow(r,2);

}

double side_area(double r, double h)

{

double area; //variable local to Side_area function

h = h * 0.3937; // converting h to inch

r=r*0.3937;

area = 2*PI*r*h;

return area;

}