/in/foo.cc: In member function 'int* Bigint::Calculate()':
/in/foo.cc:14:8: warning: address of local variable 'a' returned [-Wreturn-local-addr]
    int a[10000];
        ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:53:9: warning: statement has no effect [-Wunused-value]
   for (i;i>=0;i--)
         ^