/in/foo.cc: In function 'int main()':
/in/foo.cc:30:9: warning: statement has no effect [-Wunused-value]
   30 |     for(i;i>=0;i--)
      |         ^
/in/foo.cc:28:16: warning: unused variable 'j' [-Wunused-variable]
   28 |     int a,i=14,j;
      |                ^