int main()
{
LIFO_Stack st;
string str;
while(cin>>str&&!st.full())
st.push(str);
cout<<'\n'<<"About to call peek with LIFO_Stack"<<endl;
peek(st,st.top()-1);
cout<<st;
Peekback_Stack pst;
while(!st.empty())
{
string t;
if(st.pop(t))
pst.push(t);
}
cout<<"About to call peek() with Peekback_Stack"<<endl;
peek(pst,pst.top()-1);
cout<<pst;
system("pause");
return 0;
}
void ex5_1()
{
/*
once upon a time
About to call peek() with LIFO_Stack
peek failed!
time
a
upon
once
About to call peek() with Peekback_Stack
peek: once
once
upon
a
time
*/
LIFO_Stack st;
string str;
cout << "Please enter a series of strings.\n";
while ( cin >> str && ! st.full() )
st.push( str );
cout << endl << "About to call peek() with LIFO_Stack" << endl;
peek( st, st.top()-1 );
cout << st;
Peekback_Stack pst;
while ( ! st.empty() ) {
string t;
if ( st.pop( t ))
pst.push( t );
}
cout << "About to call peek() with Peekback_Stack" << endl;
peek( pst, pst.top()-1 );
cout << pst;
}