Linked List Problem

codehead · Nov 28, 1999

Hello, 
 
I can't get the following code to compile. It compiles O.K. if you REM out the second list code. Is VC++ getting confused with my names or is it a structual problem? 
 
TIA, 
 
Bob 
 
#include <iostream.h> 
 
class CharList { 
public: 
char Character; 
char CharacterTwo; 
CharList *Next; 
secondCharacterList *secondNext; 
}; 
 
//Input first list 
char GetCharacter() { 
char Character; 
 
cout << "What is the List 1 character?\n"; 
cin >> Character; 
return Character; 
} 
 
char GetCharacterTwo() { 
char CharacterTwo; 
 
cout << "What is the List 2 character?\n"; 
cin >> CharacterTwo; 
return CharacterTwo; 
} 
 
 
//Here is where the program begins 
void main() 
{ 
int i; 
char Character; 
char CharacterTwo; 
 
//This points to the current List1 IntList item 
CharList *ListPtr; 
 
//This points to the last List1 IntList item created 
CharList *LastPtr = 0; 
 
//This points to the first List1 item in the list 
CharList *First = 0; 
 
//Read in characters from the user 
for (i=0; i<2; i++) 
{ 
Character = GetCharacter(); 
//Create a new structure to hold the character. 
ListPtr = new CharList; 
 
//Fill in the structures values. 
ListPtr->Character = Character; 
ListPtr->Next = 0; 
 
//If this isn't the first item created, 
//connect it to the list. Otherwise, it 
//is the start of the list. 
if (LastPtr) 
//LastPtr->Next is the Next pointer from 
//the last item in the list. Connect it. 
LastPtr->Next = ListPtr; 
else 
//If this is the first item, be sure 
//to save where it starts. 
First = ListPtr; 
 
//Set the LastPtr 
LastPtr = ListPtr; 
}; 
 
// Print out 
if (First) { 
cout << "The list is "; 
 
//Now use ListPtr to traverse the list 
ListPtr = First; 
 
//Read through the list until Next is null 
do { 
//Print out the number 
cout << ListPtr->Character << " "; 
 
// Move on to the next item in the list 
ListPtr = ListPtr->Next; 
} 
//Stop when ListPtr is 0 
while (ListPtr); 
 
cout << endl; 
} //end of if 
 
//This points to the current List2 IntList item 
secondCharacterList *secondListPtr; 
 
//This points to the last List2 IntList item created 
secondCharacterList *secondLastPtr = 0; 
 
//This points to the first List2 item in the list 
secondCharacterList *secondFirst = 0; 
 
//Read in characters from the user 
for (i=0; i<2; i++) 
{ 
CharacterTwo = GetCharacterTwo(); 
//Create a new structure to hold the character. 
//ListPtr will now point to this structure. 
secondListPtr = new secondCharacterList; 
 
//Fill in the structures values. 
secondListPtr->CharacterTwo = CharacterTwo; 
secondListPtr->secondNext = 0; 
 
//If this isn't the first item created, 
//connect it to the list. Otherwise, it 
//is the start of the list. 
if (secondLastPtr) 
//LastPtr->Next is the Next pointer from 
//the last item in the list. Connect it. 
secondLastPtr->secondNext = secondListPtr; 
else 
//If this is the first item, be sure 
//to save where it starts. 
secondFirst = secondListPtr; 
 
//Set the LastPtr 
secondLastPtr = secondListPtr; 
}; 
 
// Print out. 
if (secondFirst) { 
cout << "The list is "; 
 
//Now use ListPtr to traverse the list 
secondListPtr = secondFirst; 
 
//Read through the list until Next is null 
do { 
//Print out the number 
cout << secondListPtr->CharacterTwo << " "; 
 
//Now move on to the next item in the list 
secondListPtr = secondListPtr->secondNext; 
} 
//Stop when ListPtr is 0 
while (secondListPtr); 
 
cout << endl; 
} //end of if 
 
}

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Linked List Problem

codehead

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