foo.c: In function 'pdcjss':
foo.c:15:3: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   15 |   for(;x;x/=10)
      |   ^~~
foo.c:18:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   18 |     if(x==0)
      |     ^~
foo.c: In function 'main':
foo.c:26:1: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   26 | scanf("%d",&x);
      | ^~~~~~~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务