Template Class Example in C++

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In the code, a class template stack is defined which is used to create stack objects of any type T. The class has two private data members stk which is a pointer to an array of type T and top which keeps track of the top element of the stack. The class also has a public constructor which initializes the size of the stack, a push method to insert elements into the stack, and a pop method to remove elements from the stack.

In the main function, a stack object s of type int is created with a size of 2. Two integers 10 and 12 are pushed onto the stack using the push method. However, when the push method is called again with the argument 15, the stack is full and the message "Stack Full" is printed on the console.

Note that the implementation of the pop method is incomplete and may cause undefined behavior when called on an empty stack. It is recommended to add a check for an empty stack before popping an element from it.

Source Code

#include<iostream>
using namespace std;
template <class T>
class stack
{
    T *stk;
    int top;
    int nSize;
public:
    stack(int sz)
    {
        nSize=sz;
        top=-1;
        stk=new T[nSize];
    }
    void push(T x);
    T pop();
};
template <class T>
void stack<T>::push(T x)
{
    if(top==nSize-1)
        cout<<"Stack Full"<<endl;
    else
    {
        top++;
        stk[top]=x;
    }
}
template <class T>
T stack<T>::pop()
{
    T x=0;
    if(top==-1)
        cout<<"Stack Empty "<<endl;
    else
    {
       x=stk[top] ;
       top--;
    }
    return x;
}
int main()
{
    stack<int> s(2);
    s.push(10);
    s.push(12);
    s.push(15);
    return 0;
}

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Output

Stack Full

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Program List

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• Hello World In C++
• Why we using namespace std in C++
• Getting Inputs in C++
• std::string class in C++
• if Statement in C++
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• For Loop in C++
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• Factors of a Given Number using C++
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• Arrays in C++
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• Function In C++
• Function Overloading In C++
• Default Argument Function In C++
• Template In C++
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• Default Constructor in C++
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• Constructor Overloading in C++
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• Pure Virtual Function & Abstract Class in C++
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• Armstrong number using For Loop
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• Formula Examples using For Loop
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Operator and Function Example

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