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each time ,when I delete some code,the copy buffer will be replaced by the deleted word.
for example:
1 #if 0
2 #include <stdio.h>
when I move to 1,press [yy],vim will copy this line to...

<Data Structures Using C> r krishnamoorthy ,G indirani kumaravel
<data structures and algorithm analysis in C>

agree with stdq ,use two-dimensional array

you win when you move the bracket to the D4(south-east).
in each movement , the bracket need 2 presupposition when you move it from the source to the distination:
1.the source and the distination...

not a big problem,just a warning

your CODE can't act like you want, nonoob's is right.

I write a C code,simulate the code in page 69 of <the C programming language>
count the polish notation.
for example ,input: 2 1 - it should answer: 1
input:...

if(x[i]=' ')
= -> ==

vim+gcc+gdb.win7: gvim + codeblocks(gcc+gdb)