Related operations queue (print queue implementation of Pascal's Triangle)
1. Implementation of a queue memory structure
2. The implementation-dependent operation queue
3 by the operation characteristics of the queue, into the team by the printing operation is completed dequeue task binomial coefficient (printing Pascal triangle)
In view of achieving a variety of data types, using a C ++ template-prepared, using the STL vector class container library functions to store data, the main achievement of the circular queue, the following functions:
class MyCircularQueue
{
private:
vector<T> data;
int head;
int tail;
int size;
public:
MyCircularQueue() {
data.resize(k);
head = -1;
tail = -1;
size = k;
}
bool setsize(int k);
bool enQueue(const T& value);//进队
bool deQueue(T& x); //出队
T getFront() ;//取队列头部元素
T getRear();//取队列位尾部元素
bool isEmpty();//判断是否为空
bool isFull();//判断是否为满
};
The main function of the associated implementation
Queue element into the team
/** Insert an element into the circular queue. Return true if the operation is successful. */
template <class T>
inline bool MyCircularQueue<T>::enQueue(const T& value) {
if (isFull()) {
return false;
}
if (isEmpty()) {
head = 0;
}
tail = (tail + 1) % size;
data[tail] = value;
return true;
}
Queue element from the team
/** Delete an element from the circular queue. Return true if the operation is successful. */
template <class T>
inline bool MyCircularQueue<T>::deQueue(T& x)
{
x=data[head];
if (isEmpty()) {
return false;
}
if (head == tail) {
head = -1;
tail = -1;
return true;
}
head = (head + 1) % size;
return true;
}
Queues header element
/** Get the front item from the queue. */
template <class T>
inline T MyCircularQueue<T>::getFront()
{
if (isEmpty()) {
return -1;
}
return data[head];
}
Queues bit trailing elements
/** Get the last item from the queue. */
template <class T>
inline T MyCircularQueue<T>::getRear()
{
if (isEmpty()) {
return -1;
}
return data[tail];
}
Test function enables the printing of Pascal's Triangle
MyCircularQueue<int> queve;
int temp=0,x;
int n;
cin>>n;
int i=1,j,s=0,k=0,t=0,u;
queve.enQueue(i);queve.enQueue(i);
for(i=1;i<=n;i++)
{
cout<<endl;
for (j = 1; j<=n - i ; j++)
{
cout<<setw(3)<<" ";
}
queve.enQueue(k);
for(j=1;j<=i+2;j++)
{
queve.deQueue(t);
u=s+t;
queve.enQueue(u);
s=t;
if(j!=i+2){
cout<<setw(6)<<s;
}
}
}
return 0;
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