#if 0

hello,

plz help me.

i have a code

#if 0
blah blah blah
#endif


in the middle of the program

what does this mean

It means the code between #if 0 and #endif is never compiled.
It's usually used to quickly exclude code from being compiled. Some people find them more convenient then using /**/ comments, which won't comment other nested /**/.

thanq so much......