help with my program

[niemi7]

this is my program right now. I am getting an unresolved external error and unresolved external symbol_main referenced in function_tmainCRTStartup. What does this mean. It seems as if every time i even try to use C++ these are the errors that I get. Please help me.

#include <iostream>
using namespace std;

class Queue
{
private:

struct node
{
int data; //this is the part within the node that holds the data
node *item; //this is the 2nd part of the node that points to the data of the next node
}*Q;

public:

Queue(); //constructor


void Push( int X); //this will add items to the linkedlist
bool Array_Is_Empty(); //this is boolean because it either is or isn't empty (T or F)
bool Array_Is_Full(); //this is also boolean because it either is or isn't full
void Empty_Array(); //this will empty the stack
void Add_To_Beginning(int X); //this will add a node to the beginning of the linkedlist
void Add_To_End(int C, int X); //this will add a node to the end of the linkedlist
void Pop( int X );
void DisplayList();
int CountList();
~Queue(); //destructor
};

Queue::Queue()
{
Q=NULL;
}

void Queue::Push(int X)
{
node *q,*t;

if( Q == NULL )
{
Q = new node;
Q->data = X;
Q->item = NULL;
}
else
{
q = Q;
while( q->item != NULL )
q = q->item;

t = new node;
t->data = X;
t->item = NULL;
q->item = t;
}
}


void Queue::Pop( int X )
{
node *q,*r;
q = Q;
if( q->data == X )
{
Q = q->item;
delete q;
return;
}

r = q;
while( q!=NULL )
{
if( q->data == X )
{
r->item = q->item;
delete q;
return;
}

r = q;
q = q->item;
}
cout<<"\nData "<<X<<" was not found. Please try again later.";
}

void Queue::Add_To_Beginning(int X)
{
node *q;

q = new node;
q->data = X;
q->item = Q;
Q = q;
}

void Queue::Add_To_End( int C, int X)
{
node *q,*t;
int i;
for(i=0,q=Q;i<C;i++)
{
q = q->item;
if( q == NULL )
{
cout<<"\nThere are less than "<< C <<" elements.";
return;
}
}

t = new node;
t->data = X;
t->item = q->item;
q->item = q;
}


void Queue::DisplayList()
{
node *q;
cout<<endl;

for( q = Q ; q != NULL ; q = q->item )
cout<<endl<<q->data;

}

int Queue::CountList()
{
node *q;
int c=0;
for( q=Q ; q != NULL ; q = q->item )
c++;

return c;
}

Queue::~Queue()
{
node *q;
if( Q == NULL )
return;

while( Q != NULL )
{
q = Q->item;
delete Q;
Q = q;
}
}

[Disch]

99% of the time, "unresolved external symbol" means the linker is looking for a function body and can't find it.

This is often due to you prototyping a function and calling it in your code, but never actually giving the function a body.

In your case, it's because you didn't give a int main() function. You need a main function so the computer knows where your program is supposed to start.

[niemi7]

Thank you so much! it finally works!