printf very strange parameter problem

The following code can be compiled on VS2013, but runs to the last line to make an error.

 char *s1  = " hello ";    Char *s2  =  "world" ; printf  ( "%x  %x  \ n"    , S1, S2); printf  ( "%x  %x  %x  \ n ", S1, S2); printf  ( "%s  %s  \ n"    , S1, S2); printf  ( "%s  %s  %s  \ n ", S1, S2);  

This is a legacy, and for the time being, the cause of the problem is unknown. Want to know the cattle can help answer.

printf very strange parameter problem