Simple g++ errors

Line number usually most useful
1:  #include  <iostream>
2:  int  main()  {
3:          int  i  =  42;
4:          int*  p  =  *i;
5:          cout  <<  &p  <<  endl;
6:  }
bash$  g++  -Wall  -g  -o  prog  prog.cc
prog.cc: In function `int main()':
prog.cc:4: invalid type argument of `unary *'