/in/foo.c: In function 'main':
/in/foo.c:17:14: error: expected ';' before 'printf'
   17 |         pi*=4
      |              ^
      |              ;
   18 |         printf("%.8lf\n", pi);
      |         ~~~~~~
/in/foo.c:19:16: error: invalid suffix "；" on integer constant
   19 |         return 0；
      |                ^~~
/in/foo.c:19:19: error: expected ';' before '}' token
   19 |         return 0；
      |                   ^
      |                   ;
   20 | }
      | ~