MODULE

 !Program name: MODULE

!Area of the circle and exponent  - module example

 

module circle_exponent

Implicit none

   real, parameter :: pi = 3.1415926536

   real, parameter :: e= 2.7182818284

  

contains

   subroutine consts()

      print*, "Pi = ", pi

      Print*, 'e= ', e

   end subroutine consts

 

   function areaCircle(r) result(a)

   implicit none

      real::r

      real::a   !dummy argument

      a = pi * r**2

   end function areaCircle

  

   function exponent(x) result(epx)

     implicit none

     real::x

     real::epx    !dummy argument

     epx = e**x

   end function exponent

 

end module circle_exponent

 

!main program

use circle_exponent

Real :: r

Real :: x

 

   call consts()

 

   Print *, 'Input the radius of the circle: '

   read *, r

   print*, 'Area of a circle with radius', r, '= ', areaCircle(r)

    Print *, 'Input the exponent of the base e: '

   read *, x

   print*, 'The base e power to', x, '= ', exponent(x)

   Print *, 'Good bye'

 

stop

end