foo.cc: In function 'int main()':
foo.cc:12:9: warning: unused variable 'temp' [-Wunused-variable]
   12 |  double temp = n1/n2;
      |         ^~~~
foo.cc:21:15: warning: iteration 100004 invokes undefined behavior [-Waggressive-loop-optimizations]
   21 |   decimals[c] = s;
      |   ~~~~~~~~~~~~^~~
foo.cc:16:9: note: within this loop
   16 |  while(c<mx)
      |        ~^~~

[Hydro](https://hydro.ac)提供评测服务