我不喜欢fortran,
奇怪的词法规则(竟然不用空格分开token),
io操作竟然是语言的一部分(这种非本质的东西像C那样用库来扩展多好)
。。。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | program link implicit none type node character(20) name integer id integer score type(node),pointer ::next end type integer,parameter::num=3 type(node),pointer ::students call init_all(students,num) call show_all(students) print*,"now,we add a student" call add_node(students) call show_all(students) print*,"now,we delete the student" call del_node(students) call show_all(students) contains subroutine add_node(pos) type(node),pointer ::pos,tmp allocate(tmp) tmp%name="abc" tmp%id=1 tmp%score=100 print*,"please input name,id,end score of one students" read*,tmp%name,tmp%id,tmp%score if(associated(pos%next)) then tmp%next=>pos%next pos%next=>tmp else nullify(tmp%next) pos%next=>tmp end if end subroutine subroutine del_node(pos) type(node),pointer ::pos,next next=>pos%next if(associated(next%next)) then pos%next=>next%next deallocate(next) else nullify(pos%next) deallocate(next) end if end subroutine subroutine show_all(pos) type(node),pointer ::pos,tmp integer ::cnt cnt=1 print*,"all students are:" tmp=>pos do while(associated(tmp)) print*,cnt,"th ",tmp%name,tmp%id,tmp%score tmp=>tmp%next cnt=cnt+1 end do end subroutine subroutine init_all(pos,num) type(node),pointer ::pos,tmp,walk integer num integer i allocate(tmp) nullify(tmp%next) call add_node(tmp) pos=>tmp%next deallocate(tmp) walk=>pos do i=1,num-1 call add_node(walk) walk=>walk%next end do end subroutine end program link |
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我很少讨厌某种技术,坦诚的说,关于fortran,是有其他因素参合进来了。