copy an instance of a Stack class?
May 11, 2009 at 7:37am UTC
Hello, I am trying to write a program that manipulates a stack containing integers. I have written al the usual: Push, Pop, Print, etc.. My last operator is called Copy. When called (stackA.Copy( stackB ) whatever was in stackA is deep copied into stackB. here is my code:
Stack.h:
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//=======
//Stack.h
//=======
// |
// \ | /
// \|/
// V
// ===========
#pragma once
// ===========
// ===========
class Stack
{
// =========
// Constants
// ======================================
const static int MAX_STACK_SIZE = 200;
// ======================================
// =======
public :
// =======
// ============
// Constructors
// =============
Stack(void );
// ============
// ==========
// Destructor
// ============
~Stack(void );
// ============
// ================
// Member Functions
// ==========================
void Stack::PurgeStack( );
void Stack::InitializeStack( );
void Stack::Pop( int & );
void Stack::PrintStack( );
void Stack::Push( int );
bool Stack::StackEmpty( );
bool Stack::StackFull( );
int Stack::SumOfElements(int & );
void Stack::Average( );
void Stack::Roll( );
void Stack::Copy( Stack& );
// =========================
// ========
private :
// ========
// ================
// Member variables
// ========
int top;
int elements[MAX_STACK_SIZE];
// =============================
}; // Class Stack
// =================
//===========
//End Stack.h
//===========
Stack.cpp:
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//=========
//Stack.cpp
//=========
// |
// \ | /
// \|/
// V
//=================
#include "StdAfx.h"
#include <iostream>
#include <iomanip>
//=================
#include "Stack.h"
//================
//==================
using namespace std;
//==================
// ============
// Constructors
// ============
// ===================
// Default Constructor
// ====================
Stack::Stack( void )
{
PurgeStack();
} //End Constructor
// ===================
// ==========
// Destructor
// =====================
Stack::~Stack( void )
{
} //End Destructor
// ==================
// ================
// Member-Functions
// ================
// ===================
// Function PurgeStack
// =========================
void Stack::PurgeStack( )
{
for (int ii = 0; ii < MAX_STACK_SIZE; ii++)
{
elements[ii] = 0;
}
top = 0;
}//End Function PurgeStack
// ==========================
// ========================
// Function InitializeStack
// ==============================
void Stack::InitializeStack( )
{
top = 0;
}//End Function InitializeStack
// ===============================
// ============
// Function Pop
// ===================================
void Stack::Pop( int & poppedValue )
{
if (!StackEmpty()){
top--;
poppedValue = elements[top];
PrintStack();
}
else
PrintStack();
} // Member-Function Pop
// ========================
// ===================
// Function PrintStack
// =========================
void Stack::PrintStack( )
{
cout << endl << endl;
cout << "+ Top of Stack +" << endl;
cout << "=+=+=+=+=+=+=+=+=" << endl;
cout << endl;
if ( StackEmpty() )
cout << "The stack is empty." << endl;
else {
for ( int ii = top - 1; ii >= 0; ii-- ){
cout << "At index[" << ii << "] = "
<< elements[ii] << endl;
} // for
} // else
cout << endl;
cout << "=+=+=+=+=+=+=+=+=" << endl;
cout << "+Bottom of Stack+" << endl << endl;
}//End Function PrintStack
// ==========================
// =============
// Function Push
// ===================================
void Stack::Push( int pushedValue )
{
elements[top] = pushedValue;
top++;
PrintStack();
}//End Function Push
// =========================
// ===================
// Function StackEmpty
// =========================
bool Stack::StackEmpty( )
{
return (top == 0);
}//End Function StackEmpty
// ==========================
// ==================
// Function StackFull
// ========================
bool Stack::StackFull( )
{
return (top == MAX_STACK_SIZE);
}//End Function StackFull
// =========================
// ======================
// Function SumOfElements
// ==================================
int Stack::SumOfElements(int & sum)
{
sum = 0;
for (int ii = 0; ii <= (top-1);ii++)
sum = sum + elements[ii];
cout << "Sum = " << sum << endl;
return sum;
}//End SumOfElements
// ====================
// ================
// Function Average
// ======================
void Stack::Average( )
{
cout << fixed << showpoint << setprecision(2);
int sum;
double result = 0;
cout << endl;
SumOfElements( sum );
cout << endl;
double total = sum;
double divisor = top;
if (sum == 0)
cout << "Average = 0, the stack is empty" << endl << endl;
else
{
result = total/ divisor;
cout << "Average = " << result << endl << endl;
}
}
void Stack::Roll( )
{
if (top == 0)
cout << "Stack is empty, There are no elements to roll" << endl << endl;
else if (top == 1)
cout << "There is only one element in the stack, nothing to roll with" << endl << endl;
else
{
int temp;
temp = elements[top-1];
elements[top-1] = elements[top-2];
elements[top-2] = temp;
PrintStack( );
}
}
void Stack::Copy( Stack& otherStack)
{
top = otherStack.top;
for ( int ii = top-1; ii >=0 ; ii--){
elements[ii] = otherStack.elements[ii];
}
}
// ====================
// End Member-Functions
// =====================
//=============
//End Stack.cpp
//=============
Any help would be appreciated!!!
May 11, 2009 at 9:30am UTC
Your stack is a stack of ints held in a fixed array. You can do a bitwise copy.
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void Stack::Copy(const Stack& otherStack)
{
if (this != &otherStack)
*this = otherStack;
return *this ;
}
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