/in/foo.c: In function 'main':
/in/foo.c:19:50: error: expected ';' before '}' token
   19 |                  {printf("%d is not a primer!",n)}
      |                                                  ^
      |                                                  ;
/in/foo.c:20:9: error: expected declaration or statement at end of input
   20 |         return 0;}
      |         ^~~~~~