/in/foo.cc: In function 'int main()':
/in/foo.cc:21:11: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations]
       b[i]=use-48;
       ~~~~^~~~~~~
/in/foo.cc:19:19: note: within this loop
      for(int i=1;i<=3;i++){
                  ~^~~
/in/foo.cc:17:11: warning: iteration 2 invokes undefined behavior [-Waggressive-loop-optimizations]
       a[i]=use-48;
       ~~~~^~~~~~~
/in/foo.cc:15:19: note: within this loop
      for(int i=1;i<=3;i++){
                  ~^~~
/in/foo.cc:24:28: warning: array subscript is above array bounds [-Warray-bounds]
       c=a[1]*i*i+a[2]*i+a[3];
                         ~~~^
/in/foo.cc:26:29: warning: array subscript is above array bounds [-Warray-bounds]
        d=b[1]*j*j+b[2]*j+b[3];
                          ~~~^