Sams Teach Yourself C++ in 21 Days

Answers 859

D

7. The function setValue(Animal&,int)was declared to be a friend, but the over-
   loaded function setValue(Animal&,int,int)was not declared to be a friend.


8. The following is the fixed listing:
   0: // Bug Busters
   1: #include
   2: using namespace std;
   3: class Animal;
   4:
   5: void setValue(Animal& , int);
   6: void setValue(Animal& ,int,int); // here’s the change!
   7:
   8: class Animal
   9: {
   10: friend void setValue(Animal& ,int);
   11: friend void setValue(Animal& ,int,int);
   12: private:
   13: int itsWeight;
   14: int itsAge;
   15: };
   16:
   17: void setValue(Animal& theAnimal, int theWeight)
   18: {
   19: theAnimal.itsWeight = theWeight;
   20: }
   21:
   22: void setValue(Animal& theAnimal, int theWeight, int theAge)
   23: {
   24: theAnimal.itsWeight = theWeight;
   25: theAnimal.itsAge = theAge;
   26: }
   27:
   28: int main()
   29: {
   30: Animal peppy;
   31: setValue(peppy,5);
   32: setValue(peppy,7,9);
   33: return 0;
   34: }

Day 17

Quiz

1. The insertion operator (<<) is a member operator of the ostreamobject and is used
   for writing to the output device.


2. The extraction operator (>>) is a member operator of the istreamobject and is
   used for writing to your program’s variables.

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