Hi,
I agree this is not a bug. %c works as described. However, Mr. Wang may want to read one of Greg's brilliant FAQ entries [1].In general it's a bit of a pity that printf can do character->number conversion, but not (directly) back. But it is like it is and the "workarounds" are not really complicated.
Jan [1] http://mywiki.wooledge.org/BashFAQ/071 -- Be conservative in what you do, be liberal in what you accept from others. - jbp, master of the net, in RFC793
