I Guess I Am Correct In Logic For Display N Search Functions But Find No Output. I Cud Only Input 3 Elements When I Ran This Code Last Time. Could U Help Me ?!

#include <iostream>
using namespace std;
class SLLIST;
class node
{
	private: int ele;
			 node *addrs;
	public: friend class SLLIST;
};
class SLLIST
{
	private: node *head;
	public: 
			SLLIST()
			{	head='\0';
			}
			void insert_beg();
			void insert_end();
			void display();
			bool search(int);
};
void SLLIST::insert_beg()
{
	node *temp=new node();
	cout<<"enter element:"<<endl;
	cin>>temp->ele;
	temp->addrs='\0';
 
	if (head=='\0') head=temp;
	else
	{	node *t=new node();
		t=head;
		temp->addrs=t;
	}
}
void SLLIST::insert_end()
{	
	node *temp=new node();
	cout<<"enter element:"<<endl;
	cin>>temp->ele;
	temp->addrs='\0';
 
	if (head='\0')	head=temp;
	else
	{
		node *t=new node();
		t=head;
		while(t->addrs!='\0')	t=t->addrs;
		t->addrs=temp;
	}
}
void SLLIST::display()
{
	node *t=new node();
	t=head;
	if (head=='\0')	cout<<"list is empty"<<endl;
	else
	{	while(t->addrs!='\0')	
			{	cout<<t->ele<<endl;
				t=t->addrs;
			}
	         cout<<t->ele<<endl;
	}
}
bool SLLIST::search(int key)
{
	node *t=new node();
	t=head;
	if(head=='\0')	return false;
	else if((t->addrs=='\0')&&(t->ele==key))	return true;
	else
	{
		while(t->addrs!='\0')
		{	if(key==t->ele)	return true;
			else t=t->addrs;
		}
		return false;
	}
}
int main() {
	SLLIST s;
	s.insert_beg();

	s.insert_beg();
	s.insert_end();
	char ch=s.search(56);
        if (ch=="true")    cout<<"key found";
        else cout<<"key not found";

        s.display();
        return 0;
}