rajabishek

#include<iostream>
using namespace std;

template <class datatype>
class StackInterface{
public:
	virtual void push(datatype data) = 0;
	virtual datatype peek() = 0;
	virtual void pop() = 0;
	virtual bool isEmpty() = 0;

rajabishek

#include<iostream>
using namespace std;

template <class datatype>
class Linkedlist{
	Linkedlist* head;
public:
	datatype data;
	Linkedlist* next;
	Linkedlist(){

rajabishek

#include<iostream>
using namespace std;

class Sort{
public:

    static void swap(int& a, int &b){
        int temp = a;
        a = b;
        b = temp;

rajabishek

#include<iostream>
#include<stack>
using namespace std;

class PostfixEvaluator{
    
    string expression;
    bool isOperator(char c){
        if(c == '+' || c == '-' || c == '*' || c == '/')
            return true;

rajabishek

#include<iostream>
#include<stack>
using namespace std;

class PostfixConverter{
    string infix;
    string postfix;
    
    bool isOperand(char C){
        if(C >= '0' && C <= '9') return true;