Templates M9 Test

Templates M9 Test

  1. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <string>
using namespace std;
template<class Ty> class Pocket
{
  Ty value;
public:
  Pocket(){}
  Pocket(Ty value);
  Ty getValue()
  {
    return value;
  }
  void add (Ty _Right)
  {
    value += _Right;
  }
  template < class Tx > Tx get (Tx _Right)
  {
    return (Tx) (value) + _Right; //LINE I
  }
  friend ostream & operator<<(ostream & _os, const Pocket<Ty> &value)
  {
    _os << value.value;
    return _os;
  }
};
template<class T> Pocket < T >::Pocket (T value):value (value){}

int
main()
{
  Pocket < string > a ("Hi");
  string n ("Tech");
  a.add(n); //LINE II
  cout << a << ", ";
  cout << a.get < double >(1);
  return 0;
}
    •  the program outputs HiTech,
    • compilation error in LINE I
    • the program outputs Hi, Tech
    • runtime error at LINE I
    • compilation error in LINE II
    • the program outputs HiTech, HiTech

  2. What will happen when you attempt to compile and run the following code?

    #include <iostream>
using namespace std;
template<class T> class Pocket
{
  T value; //LINE I
public:
  Pocket (T value):value (value)
  {
  }
};
int
main()
{
   Pocket < double > a (7);
   cout << a.value << end1; //LINE II
   return 0;
}
    •  the program outputs 127.45, 0x7f.2d, 0x7f.2d
    • compilation error in LINE II
    • compilation error in LINE I
    • runtime error at LINE I
    •  the program outputs 127.45, 0x7f.2d, 7f.2d
    •  the program outputs 127.45, 0x7f, 7f

  3. What will happen when you attempt to compile and run the following code?

    #include <iostream>
using namespace std;
template<class A> void
f (A & a) //LINE I
{
  cout << 1 + a << endl;
}
void
f (double &a) //LINE II
{
  cout << 2 + a << endl;
}
int
main()
{
   float a = 1.5;
   f < float &>(a); //LINE II
   return 0;
}
    •  the program outputs 2.5
    • the program outputs 2
    • the program outputs 3.5
    • compilation error in LINE II
    • compilation error in LINE I
    • runtime error at LINE II

  4. What will happen when you attempt to compile and run the following code assuming that you will enter following sequence: 9 8 7<enter>?

    #include <iostream>
#include <string>
using namespace std;
template<typename T> class Pocket
{
  T value;
 public:
  Pocket()
  {
  }
  Pocket (T value);
  T getValue()
  {
    return value;
  }
  void add (T _Right)
  {
    value += _Right;
  }
};
template < class T>Pocket <T>::Pocket (T value):value(value){}
int
main()
{
  Pocket <string> a("Hi");
  string n ("Maker");
  a.add(n); //LINE I
  cout<< a.getValue() <<", ";
  a.add (3); //LINE II
  cout <<a.getValue();
  return 0;
}
    •  the program outputs HiMaker
    • compilation error in LINE II
    • the program outputs HiMaker, HiMaker
    • runtime error at LINE II
    • compilation error in LINE I
    • the program outputs Hi, Maker

  5. What happens if you try to compile and run this program?

    #include <iostream>
#include <string>
using namespace std;
template <class T> class Pocket
{
public:
  T value; //LINE I
Pocket(T value):value(value){}
};
int
main()
{
  Pocket<double>a(7);
  cout << a.value<<endl; //LINE II
  return 0;
}
    • the program outputs 0
    • the program outputs 7.0000
    • compilation error in LINE II
    • runtime error at LINE II
    • the program outputs 7
    • compilation error in LINE I

  6. What happens if you try to compile and run this program?

    #include <iostream>
using namespace std;
class SomethingSpacial
{
public:
  double value;
   SomethingSpacial():value(0){}
   SomethingSpacial(double value):value(value){}
   SomethingSpacial operator += (SomethingSpacial & _Right)
  {
    SomethingSpacial result;
    result.value = value + _Right.value;
    return result;
  }
};
template<typename T>class Pocket
{
  T value;
public:
  Pocket(){}
  Pocket (T value);
  T getValue()
  {
    return value;
  }
  void add(T _Right)
 {
   value += _Right;
 }
};
template<class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
  Pocket<double>a(7); //LINE I
  Pocket<SomethingSpacial> n;
  n.add(SomethingSpacial()); //LINE II
  cout << a.getValue()<<", ";
  a.add(3);
  cout << a.getValue();
  return 0;
}
    • the program outputs 10, 13
    • the program outputs 7, 10
    • the program outputs 7, 7
    • compilation error in LINE II
    • compilation error in LINE II
    • runtime error at LINE II

  7.  What will happen when you attempt to compile and run the following code assuming that you will enter following sequence:9 8 a <enter>?

    #include <iostream>
#include <string>
using namespace std;
template<typename T>class Pocket
{
  T value;
  public:
  Pocket(){}
  Pocket(T value);
  T getValue()
  {
    return value;
  }
  void add(T _Right)
  {
    value += _Right;
  }
};
template<class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
  Pocket<string>a("Hi");
  string n("Maker");
  a.add(n); //LINE I
  cout << a.getValue() <<", "; //LINE II
  cout <<a.getValue();
  return 0;
}
    • the program outputs HiMaker, HiMaker
    • runtime error at LINE II
    • compilation error in LINE I
    • the program outputs Hi, Maker
    • the program outputs HiMaker, 
    • compilation error in LINE II

  8. What happens if you try to compile and run this program?

    #include <iostream>
#include <string>
using namespace std;
template<typedef T> //LINE I
  class Pocket
{
public:
  T value;
  Pocket (T value);
};
template<class T>Pocket<T>::Pocket(T value):value(value){} //LINE II
int
main()
{
  Pocket<double> a(7);
  cout << a.value<<endl;
  return 0;
}
    • runtime error at LINE II
    • the program outputs 7
    • compilation error in LINE II
    • the program outputs 0
    • compilation error in LINE I
    • the program outputs 7.0000

  9. What will happen when you attempt to compile and run the following code?

    #include <iostream>
using namespace std;
template<class T>void
f(T & a) //LINE I
{
  cout << 1 + a << endl;
}
int
main()
{
  int a = 1;
  f(a); //LINE II
  return 0;
}
    • the program outputs 2
    • runtime error at LINE II
    • compilation error in LINE II
    • the program outputs 3
    • compilation error in LINE I
    • the program outputs 1

  10.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;
template<class T>void
f(T & a) //LINE I
{
   cout << 1 + a << endl;
}
void
f(double &a) //LINE II
{
   cout << 2 + a << endl;
}
int
main()
{
   double a = 1.5;
   f(a); //LINE II
   return 0;
}
    • the program outputs 2.5
    • runtime error at LINE II
    • the program outputs 3.5
    • the program outputs 2
    • compilation error in LINE I
    • compilation error in LINE II

  11.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;
template<class T> class Pocket
{
  T _v;
public:
  Pocket(){}
Pocket(T v):_v (v){}
  T getV()
  {
    return _v;
  }
  void add(T & a)
  {
     _v += a;
  }
};
int
main()
{
  Pocket<string> a("Hello");
  string s (" world!");
  a.add(s);
  cout << a.getV() <<endl;
  return 0;
}
    • the program outputs Hello
    • the program outputs Hello world!
    • program will run without any output
    • program will not compile

  12.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;
class NothingSpecial{};
template<typename T> class Pocket
{
  T value; //LINE I
public:
  Pocket(){}
  Pocket (T value);
  T getValue()
  {
    return value;
  }
  void add (T _Right)
  {
     value += _Right;
  }
};
template <class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
  Pocket<double> a(7);
  Pocket<NothingSpecial> n; //LINE II
  a.add(3);
  cout << a.getValue() <<", ";
  a.add(3);
  cout << a.getValue();
  return 0;
}
    • the program outputs 10, 10
    • compilation error in LINE II
    • the program outputs 10, 13
    • compilation error in LINE I
    • runtime error at LINE II
    • the program outputs 7, 7

  13.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;
template<class T> class Pocket
{
public:
T value;
Pocket (T value);
};
template <class T> Pocket::Pocket(T value):value(value)
{
} //LINE II

int
main()
{
Pocket<double>
a(7); //LINE II
cout << a.value <<endl;
return 0;
}
    • the program outputs 7.0000
    • the program outputs 7
    • the program outputs 0
    • runtime error at LINE II
    • compilation error in LINE I
    • compilation error in LINE II

  14.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;
class SomethingSpecial{};
template<typename T> class Pocket
{
  T value;
public:
  Pocket(){}

  Pocket(T value);
  T getValue()
  {
    return value;
  }
  void add (T _Right)
  {
    value += _Right;
  }
};
template <class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
  Pocket<double>a (7); //LINE I
  Pocket<SomethingSpecial> n;
  n.add(SomethingSpecial()); //LINE II
  cout << a.getValue() <<", ";
  a.add(3);
  cout << a.getValue();
  return 0;
}
    • compilation error in LINE II
    • compilation error in LINE I
    • the program outputs 7, 7
    • the program outputs 10, 13
    • runtime error at LINE II
    • the program outputs 7, 10

  15.  What happen if you try to compile and run this program?

    #include <iostream>
using namespace std;
template<class T> class Pocket
{
public:
  T value;
  Pocket (T value);
};
template <class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
  Pocket<double>a(7); //LINE II
  cout << a.value<<endl;
  return 0;
}
    • the program outputs 7
    • compilation error in LINE I
    • compilation error in LINE II
    • the program outputs 0
    • the program outputs 7.0000
    • runtime error at LINE II

  16. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <string>
using namespace std;
template<typename T> //LINE I
class Pocket
{
   public:
   T value;
   Pocket(T value);
};
template<class T>Pocket<T>::Pocket(T value):value(value){} //LINE II
int
main()
{
  Pocket<double> a(7);
  cout << a.value<<endl;
  return 0;
}
    • the program putouts 0
    • the program putouts 7.0000
    • runtime error at LINE II
    • compilation error in LINE II
    • the program outputs 7
    • compilation error in LINE II

  17. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <string>
using namespace std;
template<typename T> class Pocket
{
  T value;
public:
  Pocket (){}
  Pocket(T value);
  T getValue()
  {
     return value;
  }
  void add(T _Right)
  {
     value += _Right;
  }
  void add (string & _Right)
  {
      value.insert(0, _Right);
  }
};
template <class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
  Pocket<string>a("Hi");
  string n ("Tech");
  a.add(n); //LINE I
  cout << a.getValue() <<", "; //LINE II
  cout <<a.getValue();
  return 0;
}
    • runtime error at LINE II
    • compilation error in LINE I
    • the program outputs HiTech, HiTech
    • the program outputs HiTech,
    • compilation error in LINE II
    • the program outputs Hi, Tech

  18. What happen if you try to compile and run the this  program?

    #include <iostream>
using namespace std;
template<class T>void //LINE I
  f(T & a)
  {
    cout << 1 + a << endl;
  }
  void
  f(double &a) //LINE II
  {
    cout << 2 + a << endl;
  }
int
main()
{
  int a =1.5;
  f(a); //LINE II
  return 0;
}
    • the program outputs 3.5
    • the program outputs 2.5
    • compilation error in LINE II
    • compilation error in LINE I
    • runtime error at LINE II
    • the program outputs 2

  19. What will happen when you attempt to compile and run the following code?

    #include <iostream>
#include <string>
using namespace std;
template<class Ty> class Pocket
{
  Ty value;
public:
  Pocket(){}
   Pocket (Ty value);
  Ty getValeu()
 {
    return value;
 }
 void add(Ty _Right)
 {
   value += _Right;
 }
 template<class Tx> Tx get(Tx _Right)
  {
     return (Tx)(value) + _Right; //LINE I
  }
 friend ostream & operator << (ostream & _os, const Pocket<Ty> & value)
  {
    _os <<value.value;
    return _os;
  }
};
template<class T> Pocket<T>::Pocket(T value):value(value){}
int
main()
{
    Pocket<int> a(7);
    cout <<a<<", ";
    cout <<a.get<double>(2);
    return 0;
}
    • the program outputs 7
    • the program outputs 7, 9
    • compilation error in LINE I
    • the program outputs 7, 2
    • runtime error at LINE I
    • compilation error in LINE II

  20. What happen if you try to compile and run the this  program?

    #include <iostream>
using namespace std;
template<class T> void
f(T & a) //LINE I
{
  cout << 1 +a << endl;
}
voidf(double & a)
{
  cout <<2 + a<< endl;
}
int
main()
{
  double a = 1.5;
  f<double &> (a); //LINE II
  return 0;
}
    • the program outputs 127, 7f, 0x7f
    • compilation error in LINE II
    • compilation error in LINE I
    • runtime error at LINE II
    • the program outputs 2
    • the program outputs 2.5
    • the program outputs 3.5
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