********try1*********
program try1
    implicit none
    real::a1(2,2)
    interface
        subroutine sub1(a2)
            real::a2(:,:)
        end subroutine
    end interface
    a1(1:2,1:2)=0.0
    call sub1(a1)
    stop
end program

subroutine sub1(a2)
    implicit none
    real::a2(:,:)
    return
end subroutine  
  
*********try2************
program try2
    implicit none
    real::a1(2,2),b1(2,2)
    interface
        subroutine sub1(a2,b2)
            real::a2(:,:),b2(:,:)
        end subroutine
    end interface
    a1(1:2,1:2)=0.0
    b1(1:2,1:2)=0.0
    call sub1(a1,b1)
    stop
end program

subroutine sub1(a2,b2)
    implicit none
    real::a2(:,:),b2(:,:)
    return
end subroutine    

请教try2就多传了一个数组为什么就错了呢？