Implements queue class as a template - C++ template

C++ examples for template:template class

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Description

Implements queue class as a template

Demo Code

#include <iostream>
using namespace std;
const int MAX = 3;
template <class Type>
class Queue/*w  ww .  j a  v  a  2s .  c  om*/
{
   private:
   Type qu[MAX]; //array of any type
   int head;     //index of start of queue (remove item here)
   int tail;     //index of end of queue (insert item here)
   public:
   Queue()                    //constructor
   { head = -1; tail = -1; }
   void put(Type var)         //insert item at queue tail
   {
      qu[++tail] = var;
      if(tail >=MAX-1)        //wrap around if past array end
         tail = -1;
   }
   Type get()                 //remove item from queue head
   {
         Type temp = qu[++head]; //store item
         if(head >= MAX-1)       //wrap around if past array end
            head = -1;
         return temp;            //return item
   }
};
int main()
{
      Queue<float> q1;     //q1 is object of class Queue<float>
      q1.put(1111.1F);                     //put 3
      q1.put(2222.2F);
      q1.put(3333.3F);
      cout << "1: " << q1.get() << endl;   //get 2
      cout << "2: " << q1.get() << endl;
      q1.put(4444.4F);                     //put 2
      q1.put(5555.5F);
      cout << "3: " << q1.get() << endl;   //get 1
      q1.put(6666.6F);                     //put 1
      cout << "4: " << q1.get() << endl;   //get 3
      cout << "5: " << q1.get() << endl;
      cout << "6: " << q1.get() << endl;
      Queue<long> q2;      //q2 is object of class Queue<long>
      q2.put(123123123L);  //put 3 longs, get 3 longs
      q2.put(234234234L);
      q2.put(345345345L);
      cout << "1: " << q2.get() << endl;
      cout << "2: " << q2.get() << endl;
      cout << "3: " << q2.get() << endl;
      return 0;
}

Result


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