Fortran Implementation of Problem 9
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- integer Problem0009/p0009()
1! Project Euler Problem 9
2!
3! This was pretty fun to port
4!
5! Problem:
6!
7! A Pythagorean triplet is a set of three natural numbers, a < b < c, for which,
8! a**2 + b**2 = c**2
9!
10! For example, 3**2 + 4**2 = 9 + 16 = 25 = 5**2.
11!
12! There exists exactly one Pythagorean triplet for which a + b + c = 1000.
13! Find the product abc.
14
15module Problem0009
16 implicit none
17contains
18 integer function p0009() result(answer)
19 integer :: a, b, c, a_square, b_square, c_square
20 c = 3
21
22 do
23 c_square = c * c
24
25 do b = 2, c
26 b_square = b * b
27
28 do a = 1, b
29 a_square = a * a
30
31 if (a_square + b_square == c_square .and. a + b + c == 1000) then
32 answer = a * b * c
33 return
34 end if
35 end do
36 end do
37 c = c + 1
38 end do
39 end function p0009
40end module Problem0009