link list help

[ptg]

im working on a program that inserts 25 random intergers between 0 to 100 in order in a link list, and that calculates the sum of the elements and finds the average. so far my program prints out my numbers but it sometimes gives me only 2,3 or 5 numbers not 25. can someone tell me why im not getting 25 numbers?

#include <iostream>
#include <ctime>
#include <cstdlib>
using namespace std;

class Node;

class List{
public:
	List();
	void setNode( int );
	bool isEmpty( void );
	void printList( void );

private:
	Node *firstPtr;
	Node *lastPtr;
};

class Node{
	friend class List;
public:
	Node( int );								
	int getData( void );
private:
	int data;
	Node *nextPtr;
};

int main(){

	srand( time( 0 ) );

	List myList;

	for( int i = 0; i <= 25; i++ )
		myList.setNode( rand() % 100 + 1 );
	

	myList.printList();
	cout<<endl;

	return(0);
}

List::List() : firstPtr( 0 ), lastPtr( 0 )
{
	
}

void List::setNode( int d ){

	Node *newPtr = new Node( d ); //new temp node

	Node *temp = firstPtr;
	Node *trailTemp = firstPtr;


	if( isEmpty() )
		firstPtr = newPtr;

	else if( newPtr->getData() > temp->getData() )
	{
			while( newPtr->getData() > temp->getData() && temp->nextPtr != 0 ){
		
				temp = temp->nextPtr;
				trailTemp->nextPtr = temp;
			}

			if( temp->nextPtr == 0 ){
				newPtr->nextPtr = temp->nextPtr;
				temp->nextPtr = newPtr;
			} else{
				newPtr->nextPtr = temp;	
				trailTemp->nextPtr = newPtr;
			}
	
	} else{
		newPtr->nextPtr = temp->nextPtr;
		firstPtr = newPtr;
	}
}

bool List::isEmpty() {

	return( firstPtr == 0 );
}

void List::printList( void ){
	
	Node *temp = firstPtr;

	temp = temp->nextPtr;

	while( temp->nextPtr != 0 ){			//traverse the list
		cout << temp->getData() << " " ;	// print out at each node.
		temp = temp->nextPtr;
	}

	cout << temp->getData();
}

/***************** class Node functions *************************************/


Node::Node( int d ) :  data( d ), nextPtr( 0 )
{

}


int Node::getData()
{ 
	return( data );
}