[文件读写] 如何按行进行数据操作

PROGRAM MAIN
  USE typedef
  implicit none
  real::rain
  type(tdd),allocatable::t(:)! 保存气温值
  type(tdd):: total !日均温累加
  integer i , m , dy , start , end
  character(len=3) :: line
  open(7,file="CN019067")
  I=0
  do
    READ(7,*,end=100) line
    i=i+1
  end do
  100 m = i - 1 !//你这个前面只多了一行
  rewind(7)
  allocate( t(m))  
  read(7,*)
  write(*,*)"start:"
  read(*,*) start
  write(*,*)"end:"
  read(*,*) end
  do i=1,m
    read(7,*)dy , t(i)%tmax , t(i)%tmin , rain
    t(i)%average=(t(i)%tmax+t(i)%tmin)/2    !日均温
  end do
  total%average = 0
  do i=start,end
    total%average=total%average+t(i)%average    !日均温累加=积温
  enddo
  print *, dy,total%average    !
end PROGRAM