C++ queue via template class
#include <iostream> using namespace std; const int MAX = 3; template <class Type> class Queue/*ww w. jav a 2s.c o m*/ { 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; }