c-gcc, 50 bytes

Result

WA

Code [DL]

s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}

stdin

6471067834849818060772843774263524739844727262130398368018545881761468345210236237414226460902477510

stdout

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}
 ^
/tmp/code.c:1:1: warning: type defaults to ‘int’ in declaration of ‘s’ [-Wimplicit-int]
/tmp/code.c:1:6: warning: return type defaults to ‘int’ [-Wimplicit-int]
 s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}
      ^
/tmp/code.c: In function ‘main’:
/tmp/code.c:1:13: warning: implicit declaration of function ‘qsort’ [-Wimplicit-function-declaration]
 s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}
             ^
/tmp/code.c:1:19: warning: implicit declaration of function ‘gets’ [-Wimplicit-function-declaration]
 s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}
                   ^
/tmp/code.c:1:34: error: ‘strcmp’ undeclared (first use in this function)
 s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}
                                  ^
/tmp/code.c:1:34: note: each undeclared identifier is reported only once for each function it appears in
/tmp/code.c:1:42: warning: implicit declaration of function ‘puts’ [-Wimplicit-function-declaration]
 s[1];main(){qsort(gets(s),100,1,&strcmp);puts(s);}
                                          ^
/home/esolang/bin/c-gcc: line 6: /tmp/code: No such file or directory
rm: cannot remove '/tmp/code': No such file or directory

strace