I'm having problems with the code from my text book. I need modify the class so it throws an exception instead. The problem is that I get errors from the original code from the book. Any help on how to fix it would be great. Thanks in advance!
ERROR: Error 1 error C2511: 'int &IntArray::operator [](const int)' : overloaded member function not found in 'IntArray'
ERROR(ish): 2 2 IntelliSense: declaration is incompatible with "int &IntArray::operator[](const int &)" (declared at line 18 of "c:\users\projects\intarray\intarray\IntArray.h")c:\users\projects\intarray\intarray\intarray.cpp 58 16 IntArray
.H file
#ifndef INTARRAY_H
#define INTARRAY_H
class IntArray
{
private:
int *aptr; // Pointer to the array
int arraySize; // Holds the array size
void subscriptError(); // Handles invalid subscripts
public:
IntArray(int); // Constructor
IntArray(const IntArray &); // Copy constructor
~IntArray(); // Destructor
int size() const // Returns the array size
{ return arraySize; }
int &operator[](const int &); // Overloaded [] operator
};
#endif.cpp file
#include <iostream>
#include <cstdlib> // For the exit function
#include "IntArray.h"
using namespace std;
//*******************************************************
// Constructor for IntArray class. Sets the size of the *
// array and allocates memory for it. *
//*******************************************************
IntArray::IntArray(int s)
{
arraySize = s;
aptr = new int [s];
for (int count = 0; count < arraySize; count++)
*(aptr + count) = 0;
}
//******************************************************
// Copy Constructor for IntArray class. *
//******************************************************
IntArray::IntArray(const IntArray &obj)
{
arraySize = obj.arraySize;
aptr = new int [arraySize];
for(int count = 0; count < arraySize; count++)
*(aptr + count) = *(obj.aptr + count);
}
//******************************************************
// Destructor for IntArray class. *
//******************************************************
IntArray::~IntArray()
{
if (arraySize > 0)
delete [] aptr;
}
//***********************************************************
// subscriptError function. Displays an error message and *
// terminates the program when a subscript is out of range. *
//***********************************************************
void IntArray::subscriptError()
{
cout << "ERROR: Subscript out of range.\n";
exit(0);
}
//*******************************************************
// Overloaded [] operator. The argument is a subscript. *
// This function returns a reference to the element *
// in the array indexed by the subscript. *
//*******************************************************
int &IntArray::operator[](const int C)
{
if (C < 0 || C >= arraySize)
subscriptError();
return aptr[C];
}main.cpp file
#include <iostream>
#include "IntArray.h"
using namespace std;
int main()
{
const int SIZE = 10; // Array size
// Define an IntArray with 10 elements.
IntArray table(SIZE);
// Store values in the array.
for (int x = 0; x < SIZE; x++)
table[x] = x;
// Display the values in the array.
for (int x = 0; x < SIZE; x++)
cout << table[x] << " ";
cout << endl;
// Attempt to use an invalid subscript...
cout << "Now attempting to use an invalid subscript.\n";
table[SIZE + 1] = 0;
return 0;
}