/in/foo.cc: In function 'int main()':
/in/foo.cc:39:18: warning: unused variable 'cd' [-Wunused-variable]
  int x1,s1,x2,s2,cd=0,a[100000],n1,n2;
                  ^~
/in/foo.cc: In function 'int Div(int*, int, int)':
/in/foo.cc:36:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^