/in/foo.c: In function 'ShortLength':
/in/foo.c:21:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for(m=(n+1)/2-1; m>0; m--)
  ^~~
/in/foo.c:23:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   printf("%d\n",s1+s2);
   ^~~~~~
/in/foo.c:18:22: warning: unused variable 's4' [-Wunused-variable]
  int s1=0, s2=0,s3=0,s4=0;int m;
                      ^~
/in/foo.c:18:17: warning: unused variable 's3' [-Wunused-variable]
  int s1=0, s2=0,s3=0,s4=0;int m;
                 ^~