/in/foo.cc: In function 'bool prime(int)':
/in/foo.cc:7:13: warning: statement has no effect [-Wunused-value]
    7 |         for(i;i<x;i++)
      |             ^
/in/foo.cc: In function 'bool super(int)':
/in/foo.cc:28:13: warning: statement has no effect [-Wunused-value]
   28 |         for(l;p>0;l++)
      |             ^
/in/foo.cc:39:13: warning: statement has no effect [-Wunused-value]
   39 |         for(n;n<l;n++)
      |             ^