ex0825.f90

program ex0825
implicit none
  interface ! 定义函数func的接口
    function random10(lbound, ubound)
	implicit none
	real :: lbound, ubound
	real :: random10(10) ! 传回值是个数组
	end function
  end interface
  real :: a(10)
  CALL RANDOM_SEED()     ! 库函数子程式, 使用随机数前调用
  a = random10(1.0, 10.0)! 产生10个1.0～1.0之间的随机数
  write(*,"(10F6.2)") a  ! 输出数组a的内容
end

! random10会返回10个范围在lbound到ubound之间的随机数
function random10(lbound, ubound)
implicit none
  real :: lbound, ubound
  real :: len
  real :: random10(10)
  real    t
  integer i
  len = ubound - lbound  ! 计算范围大小
  do i=1,10
    call random_number(t) ! t会是0～1之间的随机数
    random10(i) = lbound + len * t ! 把t转换成lbound～ubound间的随机数
  end do
  return
end