/in/foo.cc: In function 'int removeat(int*, int, int)':
/in/foo.cc:19:13: warning: 'i' is used uninitialized in this function [-Wuninitialized]
  cout<<a[i-1]<<" ";
             ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:53:7: warning: array subscript is above array bounds [-Warray-bounds]
  a4[10]=SetInter(a1,n1,a2,n2,a4);
  ~~~~~^
/in/foo.cc:54:31: warning: 'n4' is used uninitialized in this function [-Wuninitialized]
  cout<<SetInter(a3,n3,a4,n4,a4);
                               ^