CPA Chapter 8 Assessment Answers 100%

CPA Chapter 8 Assessment Answers 100%

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

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   };

   int main() {
   Int i = 1;
   cout << i;
   return 0;
   }

   • It prints 0
   • It prints 1
   • Compilation fails
   • It prints 2

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

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   };

   ostream &operator <<(Int &a) {
   return cout << a.v;
   }

   int main() {
   Int i = 1;
   cout << i;
   return 0;
   }

   • Compilation fails
   • It prints 1
   • It prints 0
   • It prints 2

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

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   };

   ostream &operator <<(ostream &o, Int &a) {
   return o << –a.v;
   }

   int main() {
   Int i = 1;
   cout << i;
   return 0;
   }

   • It prints 1
   • It prints 0
   • It prints 2
   • Compilation fails

4. What happens when you attempt to compile and run the following code?

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   Int &operator–() {
   ++v;
   return *this;
   }
   };

   ostream &operator <<(ostream &o, Int &a) {
   return o << –a.v;
   }

   int main() {
   Int i = 2;
   cout << i;
   return 0;
   }

   • Compilation fails
   • It prints 2
   • It prints 1
   • It prints 0

5. What happens when you attempt to compile and run the following code?

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   Int &operator–() {
   ++v;
   ++v;
   return *this;
   }
   };

   ostream &operator <<(ostream &o, Int &a) {
   return o << a.v++;
   }

   int main() {
   Int i = 0;
   cout << –i;
   return 0;
   }

   • It prints 2
   • Compilation fails
   • It prints 0
   • It prints 1

6. What happens when you attempt to compile and run the following code?

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   Int &operator–() {
   ++v;
   return *this;
   }
   Int &operator–(int v) {
   v+=2;
   return *this;
   }

   };

   ostream &operator <<(ostream &o, Int &a) {
   a.v++;
   return o << a.v;
   }

   int main() {
   Int i = 0;
   –i ; i–;
   cout << i << i;
   return 0;
   }

   • It prints 23
   • It prints 21
   • It prints 12
   • It prints 10
   • Compilation fails

7. What happens when you attempt to compile and run the following code?

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   Int &operator++(int x) {
   v+=2;
   return *this;
   }

   };

   ostream &operator <<(ostream &o, Int &a) {
   return o << a.v;
   }

   int main() {
   Int i = 0;
   i++;
   cout << i << i.v;
   return 0;
   }

   • It prints 20
   • It prints 22
   • It prints 21
   • Compilation fails

8. What happens when you attempt to compile and run the following code?

   #include <iostream>
   using namespace std;
   class Int {
   public:
   int v;
   Int(int a) { v = a; }
   Int &operator[](int x) {
   v+=x;
   return *this;
   }

   };

   ostream &operator <<(ostream &o, Int &a) {
   return o << a.v;
   }

   int main() {
   Int i = 2;
   cout << i.v ;
   cout << i[2];
   return 0;
   }

   • It prints 44
   • It prints 24
   • It prints 22
   • It prints 33
   • Compilation fails

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

   #include <iostream>

   using namespace std;

   enum T { A, B, C };

   class Int {
   public:
   T v;
   Int(T a) { v = a; }

   };

   ostream &operator <<(ostream &o, Int &a) {
   return o << a.v;
   }

   int main() {
   Int i = B;
   cout << i;
   return 0;
   }

   • Compilation fails
   • It prints 0
   • It prints B
   • It prints 1

10. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    enum T { A = 2, B = -1, C };

    class Int {
    public:
    T v;
    Int(T a) { v = a; }
    Int & operator++() { v = C; return *this; }
    };

    ostream &operator <<(ostream &o, Int &a) {
    ++a;
    return o << a.v;
    }

    int main() {
    Int i = B;
    cout << i;
    return 0;
    }

    • It prints C
    • It prints 0
    • Compilation fails
    • It prints 1

11. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    enum T { A = 2, B = -1, C };

    class Int {
    public:
    T v;
    Int(T a) { v = a; }
    Int & operator++() { v += 2; return *this; }
    };

    ostream &operator <<(ostream &o, Int &a) {
    ++a;
    return o << a.v;
    }

    int main() {
    Int i = B;
    cout << i;
    return 0;
    }

    • It prints 0
    • Compilation fails
    • It prints 1
    • It prints 2

12. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    enum T { A = 2, B = -1, C };

    T operator+(T t, int i) {
    switch(t) {
    case A: return T(0);
    case B: return static_cast<T>(2);
    default:return (T)1;
    }
    }

    int main() {
    T i = A + 2;
    cout << i;
    return 0;
    }

    • It prints 2
    • Compilation fails
    • It prints 1
    • It prints 0

13. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    class N {
    public:
    float x;
    N() { x = 0.0; }
    N(float a) { x = a; }
    N(N &n) { x = n.x; }
    N &operator%(N &y) { return *new N((int)x % (int)y.x); }
    };

    int main() {
    N a(2.0),b(4.0);
    N c = a % b;
    cout << c.x;
    return 0;
    }

    • Compilation fails
    • It prints 2
    • It prints 0
    • It prints 1

14. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    class N {
    public:
    float x;
    N() { x = 0.0; }
    N(float a) { x = a; }
    N(N &n) { x = n.x; }
    N &operator<<(N &y) { return *new N(x * 10); }
    };

    int main() {
    N a(2.0),b(4.0);
    N c = a << 1;
    cout << c.x;
    return 0;
    }

    • It prints 2
    • It prints 0
    • It prints 1
    • Compilation fails

15. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    class N {
    public:
    float x;
    N() { x = 0.0; }
    N(float a) { x = a; }
    N(N &n) { x = n.x; }
    };

    N &operator=(N &y,float f) { return *new N(f); }

    int main() {
    N a;
    a = 2.0;
    cout << a.x;
    return 0;
    }

    • Compilation fails
    • It prints 2
    • It prints 1
    • It prints 0

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

    #include <iostream>

    using namespace std;

    class N {
    public:
    float x;
    N() { x = 0.0; }
    N(float a) { x = a; }
    N(N &n) { x = n.x; }
    N &operator=(float f) { x = f – 1; return *this; }
    };

    int main() {
    N a;
    a = 2.0;
    cout << a.x;
    return 0;
    }

    • It prints 2
    • It prints 0
    • It prints 1
    • Compilation fails

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

    #include <iostream>
    #include <string>

    using namespace std;

    class N {
    public:
    float x;
    N() { x = 0.0; }
    N(float a) { x = a; }
    N(N &n) { x = n.x; }
    string operator==(float f) { if(int(x) == int(f)) return “true”; else return “false”; }
    };

    int main() {
    N a(1.1);
    cout << (a == 1.9);
    return 0;
    }

    • It prints true
    • It prints an empty string
    • Compilation fails
    • It prints false

18. What happens when you attempt to compile and run the following code?

    #include <iostream>

    using namespace std;

    string operator>(float l, float r) { if(int(l) > int(r)) return “true”; else return “false”; }

    int main() {
    float l = 2.0, r=2.9999;
    cout << (l > r);
    return 0;
    }

    • It prints true
    • Compilation fails
    • It prints an empty string
    • It prints false

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

    #include <iostream>
    #include <string>

    using namespace std;

    class N {
    public:
    float x;
    N() { x = 0.0; }
    N(float a) { x = a; }
    N(N &n) { x = n.x; }
    string operator==(N &n) { if(this != &n) return “true”; else return “false”; }
    };

    int main() {
    N a(1.1), *b = &a;
    cout << (a == *b);
    return 0;
    }

    • It prints true
    • Compilation fails
    • It prints false
    • It prints an empty string

20. What happens when you attempt to compile and run the following code?

    #include <iostream>
    #include <string>
    using namespace std;
    class X {
    public:
    string n;
    X(string s) : n(s) {}
    void operator() (X x) {
    cout << x.n;
    }
    };
    int main(void) {
    X x(“a”),y(“b”);
    x(y);
    y(x);
    return 0;
    }

    • It prints ba
    • Compilation fails
    • It prints an empty string
    • It prints ab