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9. The Friends program of Chapter 14 creates an address book with people's names, telephone numbers, and birth dates. A birth date is represented as three separate components of a struct type named EntryType. Modify the Friends program so that friends' birth dates are represented using the DateType class developed in this chapter. |
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10. Below is the specification of a safe array class, which halts the program if an array index goes out of bounds. (Recall that C++ does not check for out-ofbounds indices when you use built-in arrays.) |
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const int MAX_SIZE = 200;
class IntArray
{
public:
int ValueAt( /* in */ int i ) const;
// Precondition:
// i is assigned
// Postcondition:
// IF i >= 0 && i < declared size of array
// Function value == value of array element
// at index i
// ELSE
// Program has halted with error message
void Store( /* in */ int val,
/* in */ int i );
// Precondition:
// val and i are assigned
// Postcondition:
// IF i >= 0 && i < declared size of array
// val is stored in array element i
// ELSE
// Program has halted with error message
IntArray( /* in */ int arrSize );
// Precondition:
// arrSize is assigned
// Postcondition:
// IF arrSize >= 1 && arrSize <= MAX_SIZE
// Array created with all array elements == 0
// ELSE
// Program has halted with error message
private:
int arr[MAX_SIZE];
int size;
}; |
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