/in/foo.c: In function 'main':
/in/foo.c:14:3: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   if (a[i] > a[i + 1])
   ^~
/in/foo.c:15:14: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
    c = a[i]; a[i] = a[i + 1]; a[i + 1] = c;
              ^
/in/foo.c:4:15: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
  int n, i=0,c,b;
               ^
/in/foo.c:16:5: warning: 'c' may be used uninitialized in this function [-Wmaybe-uninitialized]
   b = a[i + 1] % a[i];
   ~~^~~~~~~~~~~~~~~~~