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program types_16
implicit none
integer, parameter :: dp = kind(0.d0)
print *, add_floats(-2.3, 5.6)
print *, get_neg_f32()
print *, get_pi()
print *, get_pi_64()
print *, computeCircleArea(5.0_dp)
contains
function sqr(x) result(r)
implicit none
real(dp), intent(in):: x
real(dp) :: r
r = x * x
return
end function
function add_floats(x, y) result(r)
real, intent(in) :: x, y
real :: r
r = x + y
return
end function
function get_pi() result(r)
real :: r
r = 3.14
return
end function
function get_pi_64() result(r)
real(dp) :: r
r = 3.14_dp
return
end function
function get_neg_f32() result(r)
real :: r
r = -2.5
return
end function
function computeCircleArea(radius) result(area)
implicit none
real(dp), intent(in):: radius
real(dp) :: PI, area
PI = get_pi_64()
area = PI * sqr(radius)
return
end function
end program
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