Student s3;
 cout << s3 << endl;
    //  operator<< ( cout, s3 );


 +---------+
 |  heap   |
 |     35.1|
 |         |
 |     27.1<--\
 +---------+  |
 |         |  |
 | free... |  |
 +---------+  |
 |        p---/
 |  stack  |
 +---------+
 |         |
 | program |
 +---------+