[求助] 第一行出现十几个错误

Program read_grd
    character*160 cmdfile,inputfile,outputfile,str
    integer  line1,line2
    real  step,dx,dy
    real,dimension(:,:),allocatable::input(:,:),output(:,:)
    integer point,line
    real Xmin,Xmax,Ymin,Ymax,Gmin,Gmax

    cmdfile="cmd.par"
    open(40,file=cmdfile,status='old')
    read(40,*)
    read(40,*)
    read(40,*)
    read(40,*)
    read(40,*)
    read(40,*)str,inputfile
    read(40,*)str,line1,line2
    read(40,*)str,step
    read(40,*)str,outputfile!打开par文件读入相关的参数
    close(40)

    open(10,file=inputfile,status='old')
    read(10,*)
    read(10,*)point,line
    read(10,*)Xmin,Xmax
    read(10,*)Ymin,Ymax
    read(10,*)Gmax,Gmin
    close(10)
allocate(input(point,line),output(point,line))


    write(*,"('dx=',f5.2,'dy=',f5.2)")(Xmax-Xmin)/(line-1),(Ymax-Ymin)/(point-1)!根据相关数据计算点线距dx、dy，并在屏幕上输出
           open(20,file=inputfile,status='old')
         read(20,*)
         read(20,*)
         read(20,*)
     read(20,*)
     read(20,*)
         read(20,*)((input(i,j),i=1,point),j=1,line)
              close(20)
         !打开inputfile文件,并将其中的数据读入数组input
         open(20,file=inputfile,status='old')
         read(20,*)
         read(20,*)
         read(20,*)
    read(20,*)
    read(20,*)
         read(20,*)((input(i,j),i=1,point),j=1,line)
              close(20)

do j=1,line
    do i=1,point
        output(i,j)=input(i,j)
    end do
    end do




do j=line1,line2
    do i=1,point
        output(i,j)=input(i,j)+step
    end do
    end do

     Gmin=HUGE(Gmin)   !给Gmin赋予最大值
     Gmax=-HUGE(Gmax)  !给Gmax赋予最小值
     Do j=1,line
       Do i=1,point
       Gmin=MIN(Gmin,output(i,j))
       Gmax=MAX(Gmax,output(i,j))
  End do
End do  
!根据输入参数对数组input中某些行加入干扰值，并将最终结果存入output数组
     open(30,file=outputfile,status='unknown')
write(30,'(a)')'DSAA'
write(30,*)point,line
write(30,*)Xmin,Xmax
write(30,*)Ymin,Ymax
write(30,*)Gmin,Gmax
do j=1,line
    write(30,"(5F5.2)")(output(i,j),i=1,point)
end do
close(30)
!将output数组中的数据写入grd文件outputfile中
deallocate(input,output)

END program