/in/foo.cc: In function 'int main()':
/in/foo.cc:18:8: warning: statement has no effect [-Wunused-value]
   for(i;1;++i)
        ^
/in/foo.cc:22:9: warning: statement has no effect [-Wunused-value]
    for(j;sum2<sum1;++j)
         ^