1. 变量和数组要定义!!! 
2. 要写 Implicit None 
3. 要知道,你学的是Fortran,它是一门向量化的语言。如果按照你的写法,还不如学C语言。 
 
[Fortran] syntaxhighlighter_viewsource syntaxhighlighter_copycode program he
  Implicit None
  Real :: a(4,5),suma,average
  integer :: i
  a = reshape([2,5,12,7,6,-1,0,6,4,3,4,-9,9,8,10,5,-13,7,2,3],shape(a))
  suma=sum(a)
  average=suma/size(a)
  where( a<average) a = 0
  do i = 1 , size(a,2)
    write(*,*) a(:,i)
  end do
end program he |