stack/queuq

#include<stdio.h>
int MAXISIZE=3;
int stack[3];
int top=-1;

int isempty()
{
  if(top==-1)return 1;
  else return 0;
}
int isfull()
{
    if(top==MAXISIZE-1)return 1;
    else return 0;
}
int peck()
{
    return stack[top];
}
int push(int data)
{
    top=top+1;
    stack[top]=data;
}
int pop()
{
    int data;
    data=stack[top];
    top=top-1;
    return data;

}
int main()
{

    if(isempty())printf("isempty\n");
    else printf("%d\n",top+1);

    if(!isfull())push(1);
    if(!isfull())push(2);
    if(!isfull())push(3);

    if(isempty())printf("isempty\n");
    else printf("not empty and size = %d\n",top+1);




      while(!isempty())
      {
         int data=pop();
         printf("%d\n",data);

      }




}


#include <stdio.h>
int MAXSIZE = 3;
int q[3];
int front = 0;
int rear = -1;
int cnt = 0;

int isempty()
{
    if(!cnt)
        return 1;
    else
        return 0;
}

int isfull()
{
    if(cnt == MAXSIZE)
        return 1;
    else
        return 0;
}

int peak()
{
    return q[front];
}

int size()
{
    return cnt;
}

int enque(int data)
{

if( /*isfull()==0 &&*/ rear == MAXSIZE-1)
       rear = -1;

    rear++;


    q[rear] = data;

    cnt++;
}
int deque()
{
    int data = q[front++];

    if(front == MAXSIZE)
    {
        front = 0;
    }
    cnt--;
    return data;
}


void print()
{
    printf("Whole deque\n");


     while(!isempty())
    {
        int data=deque();
        printf("%d\n",data);
    }
}
int main()
{
    int a;
    while(1)
    {
        char str[10];


        scanf("%s",str);
        //printf("%s\n",str);

        if(str[1]=='u')
        {
            scanf("%d",&a);

    if(isfull())printf("queue is full\n");

            else enque(a);
        }
        else if(str[1]=='o')
        {

            if(isempty())
                printf("queue is empty\n");

            else{
                printf("%d\n",deque());
            }
        }

        else if(str[1]=='r')
        {
            print();
        }
    }



   /* while(!isempty())
    {
        int data=deque();
        printf("%d\n",data);
    }*/

}