ok cuz I thought that I could just directly access protected member data in the base class through an instance of the derived class (the uncommented part doesn't work). I'm not sure why that is...

If I do a public inheritance and the member data in the base class I'm deriving from is protected, is the only way to access the data in the base class via member/friend functions of the derived...

Hi, I can't get the following code to work. I have my converting constructor (second line) to change an int type to a car type but my compiler says there's something wrong with the overloaded +...

How do i dereference a pointer to something in a class without having to write another function to dereference it for me? For instance in this code:

class Fraction
{
public:
Fraction(int left...

ok i figured the problem out. It turns out that I opened the same file twice..

states.txt file

Connecticut,1788,Hartford,29
Maine,1820,Augusta,40
Massachusetts,1788,Boston,13
New Hampshire,1788,Concord,41
Rhode Island,1790,Providence,43
Vermont,1791,Montpelier,49...

The problem I'm having is with overloading the >> operator so that I could read data from a file directly into a class's member data. Everytime I run through the program, it just crashes. when I...

In the makeDb() function, I returned the instance back by value. Based on my teacher's lecture last Tuesday, however, that's very wasteful (as you have to invoke ctor/dtor/copy ctor calls) and we're...

#include <iostream>
#include <cstring>
#include <fstream>

#include "state.h"
#include "database.h"

using std::cout;
using std::cin;
using std::ifstream;

sry double post

erg i take it back. The problem i'm actually having is with trying to return something by a method called 'return value optimization.' I can't seem to create a copy of the db in the function to the...

I'm having a bit of a problem with function style cast with classes.

When I exit the function I expect an instance of Database to be returned. This instance would then be copied into the db...

argh sorry i was in a rush and only had a minute to run through the posts. thanks for the replies i will try out the things you guys suggested.

I dun think i was clear enough...

How do i get it so that if i just prompt the user for input and if he presses ENTER w/o typing anything else in, a function is called?

yah but the problem is that when I uncomment those two statements out, my program crashes :eek:

I dunno if the rest of the program would help out...

using std::cout;
using std::cin;
using...

This might seem like a silly question, but how do I read in a newline char, by itself, as input?

For example, if I gave the user a choice to enter a string for a new filename, or let them just...

class State
{
public:
State::State();
State::~State();
void initState(char * tempName, int tempYear, char * tempCap, int tempPopRank);
void copyState(State & tempState);
void...

If I have a dynimcally allocated array of objects and each of these objects contains a pointer to a string, when I use the 'delete' function to return memory, do I have to go through each array...

well thanks for the reply. I think I figured out the problem over lunch lol.

So in my class we just finished covering the topic of constructors and destructors. Now, my teacher has given us a lab where we have to create these classes and each of them must have a ctor/dtor. ...

>_<

I've been searching for nearly an hour and trying to find this memory leak. If you guys could help me find it it would be great. Thx.

#include <iostream>
#include <cstring>
#include...

wow thx :mrgreen:

Isn't the notation *(&tmp) the same as saying tmp.

thx for the reply.

I used that applet before when we were learning AVL trees. Correct me if I'm wrong, but an AVL tree must be balanced and it does use rotations. If I'm just trying to maintain...

wow thank you for the reply. I have two questions though:

1) This is similar to rotation, right?

2) Is there a specific case where I would use each on of these? I think I can see that I would...

I forgot to mention that part of the problem occurs when I try to print the list after I delete a node. I know why I can't print, but I'm not sure how to fix the tree.

I've been asked to create a movie data baseusing a hash table (w/ linked-list collision resolution) and a BST. Both of them contain a field that points a given structure (we'll call it *pMovie and...

#include <stdio.h>

struct FUN {
char x;
char *y;
int z[20];
};

int main(void) {

On a recent exam I took, the following question was given:

int ***p;

give the type for the each of the following:

a. p
b. *p
c. **p
d. ***p