# Same input,different result? [duplicate]

Using this code,you can see,same input, but the output are different. So weird!

If I copy this code here, it outputs normally. So what's the problem?

Ps:I use "10.4.0 for Microsoft Windows (64-bit) (February 26, 2016)".

I want to show how to reproduce this phenomenon.

• Reproduced in v9.0.1 and v8.0.4… how did you create these? – xzczd May 9 '16 at 12:12
• @xzczd When I read the http://www.mathprogramming-intro.org/download/MathProgrammingIntro.pdf,it is the first code in the section 4.2.4.8. – partida May 9 '16 at 12:16
• If you look at the box expressions of the two lines, they are different. This is perhaps caused by pasting code from that pdf file – vapor May 9 '16 at 13:58
• @happyfish I didn't copy it from pdf file.I type it letter by letter. – partida May 9 '16 at 14:01
• @partida Whether it is a bug depends on how you created it. If all these can be done by typing and you can tell a reproducible procedure, it is likely to be a bug. – vapor May 9 '16 at 14:25