• API
• FAQ
• Tools
• Archive
SHARE
TWEET

# Untitled

a guest Oct 21st, 2019 80 Never
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
1. #include <iostream>
2. #include <cmath>
3.
4. using namespace std;
5.
6. const double cot = 1/tan(M_PI/7) ;
7.
8. double HeptagonArea(double EdgeLength)
9. {
10.     return 7*pow(EdgeLength, 2)*cot/4 ;
11. }
12.
13. double CircleArea(double radius)
14. {
15.     return M_PI*pow(radius, 2) ;
16. }
17. bool ApproxEqual(double first, double second, double eps=1e-5)
18. {
19.     return abs(first-second) < eps ;
20. }
21. int main()
22. {
23.     double elength ;
24.     double r ;
25.     cout << "Please enter the edge length of heptagon: " ;
26.     cin >> elength ;
27.     cout << "Please enter the radius of circle: " ;
28.     cin >> r ;
29.     cout << "The area of given heptagon is: " << HeptagonArea(elength) << " and the are of given circle is: " << CircleArea(r) << endl;
30.
31.     if (!ApproxEqual(HeptagonArea(1), 3.63391))
32.         cout << "Oops! Heptagon area(1) != 3.63391\n" ;
33.     if (!ApproxEqual(HeptagonArea(5), 90.8478, 1e-4))
34.         cout << "Error! Heptagon area(5) != 90.8478\n" ;
35.     if (!ApproxEqual(HeptagonArea(10), 363.391, 1e-3))
36.         cout << "Wrong! Heptagon area(10) != 363.391\n" ;
37.
38.     if (!ApproxEqual(CircleArea(1), 3.14159))
39.         cout << "Oh no! Circle area(1) != 363.391\n" ;
40.     if (!ApproxEqual(CircleArea(5), 78.5398, 1e-4))
41.         cout << "Stop! Circle area(5) != 363.391\n" ;
42.     if (!ApproxEqual(CircleArea(10), 314.159, 1e-3))
43.         cout << "It would seem something is not quite right! Circle area(10) != 314.159\n" ;
44.     return 0;
45. }
RAW Paste Data
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.

Top