How to use the template class in another class?

[mnm71]

I have this template class and I want to use it in another class but I have trouble with FloatStack fs(5) ; how should I fix it?

#ifndef STACK_H
#define STACK_H
//stack.h
#pragma once
template <class T>
class Stack
{
public:
    Stack(int = 10) ;
    ~Stack() { delete [] stackPtr ; }
    int push(const T&);
    int pop(T&) ;  // pop an element off the stack
    int isEmpty()const { return top == -1 ; }
    int isFull() const { return top == size - 1 ; }
private:
    int size ;  // Number of elements on Stack
    int top ;
    T* stackPtr ;
} ;

//constructor with the default size 10
template <class T>
Stack<T>::Stack(int s)
{
    size = s > 0 && s < 1000 ? s : 10 ;
    top = -1 ;  // initialize stack
    stackPtr = new T[size] ;
}
 // push an element onto the Stack
template <class T>
int Stack<T>::push(const T& item)
{
    if (!isFull())
    {
        stackPtr[++top] = item ;
        return 1 ;  // push successful
    }
    return 0 ;  // push unsuccessful
}

// pop an element off the Stack
template <class T>
int Stack<T>::pop(T& popValue)
{
    if (!isEmpty())
    {
        popValue = stackPtr[top--] ;
        return 1 ;  // pop successful
    }
    return 0 ;  // pop unsuccessful
}
#endif // STACK_H  

#ifndef TEST_H
#define TEST_H
#include "Stack.h"

class test
{
public:
    test();
    typedef Stack<float> FloatStack ;

    FloatStack fs(5) ;
};

#endif // TEST_H  

[Peter87]

Either use curly brackets when specifying the default initializer for fs

FloatStack fs{5};

or use the member initializer list when defining the constructor.

test::test()
:	fs(5)
{
}

[JLBorges]

The a default-member-initializer must be a brace-or-equals-initializer

class test
{
public:
    test();
    typedef Stack<float> FloatStack ;

    // FloatStack fs(5) ; // *** no
    FloatStack fs{5} ; // use {}
    // or: FloatStack fs = FloatStack(5) ; // or use =
};