/in/foo.cc: In function 'Num mult2(Num, int)':
/in/foo.cc:36:12: warning: iteration 1004 invokes undefined behavior [-Waggressive-loop-optimizations]
   if (s.s[i]>=10) 
       ~~~~~^
/in/foo.cc:35:15: note: within this loop
  for(int i=1;i<=1005;i++) 
              ~^~~~~~
/in/foo.cc:34:18: warning: iteration 1004 invokes undefined behavior [-Waggressive-loop-optimizations]
   s.s[i]+=a.s[i]*b; 
                  ^
/in/foo.cc:33:15: note: within this loop
  for(int i=1;i<=1005;i++) 
              ~^~~~~~