17-tree_queue_linkstack_linkqueue_代码案例

代码 1 : tree

#include 
#include 

typedef struct node{

    int data;
    struct node * lchild;
    struct node * rchild;

}tree_t;

//创建
tree_t* create_tree(int data,int max)
{
    if(data>max)
        return NULL;

    tree_t* tree=malloc(sizeof(tree_t));
    tree->data=data;
    tree->lchild=create_tree(2*data,max);
    tree->rchild=create_tree(2*data+1,max);

    return tree;
}

//先序    根-》左-》右   pre
void print_pre(tree_t* tree)
{
    if(tree==NULL)
        return ;

    printf("%3d ",tree->data);

    print_pre(tree->lchild);

    print_pre(tree->rchild);

    return ;
}

//中序    左-》根-》右   mid
void print_mid(tree_t* tree)
{
    if(tree==NULL)
        return ;

    print_mid(tree->lchild);

    printf("%3d ",tree->data);

    print_mid(tree->rchild);

    return ;
}

//后序    左-》右-》根   post
void print_post(tree_t* tree)
{
    if(tree==NULL)
        return ;

    print_post(tree->lchild);

    print_post(tree->rchild);

    printf("%3d ",tree->data);

    return ;
}

//层次   从上往下，从左到右    1,2,3,4,5,6,7，
int print_tree_level(tree_t* tree)
{

    if(tree==NULL)
        return -1;

    tree_t* queue[30];//   tree_t **queue=malloc(sizeof(tree_t *)*size);
    int head=0;
    int tail=0;

    queue[tail++]=tree

    while(head!=tail)
    {
        if(queue[head]->lchild!=NULL)
            queue[tail++]=queue[head]->lchild;

        if(queue[head]->rchild!=NULL)
            queue[tail++]=queue[head]->rchild;

        printf("%3d ",queue[head++]->data);

    }
    printf("\n");
}

int main(int argc, const char *argv[])
{
    tree_t* tree=create_tree(1,7);

    print_pre(tree);
    printf("\n");

    print_mid(tree);
    printf("\n");

    print_post(tree);
    printf("\n");

    print_tree_level(tree);

    return 0;
}

---

代码 2 : queue

#include 
#include 

typedef struct node{
    int head;
    int tail;
    int size;
    int * data;
}queue_t;

//创建
queue_t* create_queue(int size)
{
    if(size<=0||size>1024)
        return NULL;

    queue_t* queue=malloc(sizeof(queue_t));
    queue->head=0;
    queue->tail=0;
    queue->size=size;

    queue->data=malloc(sizeof(int)*size);

    return queue;
}

//判空
int isempty(queue_t* queue)
{
    if(queue==NULL)
        return 0;

    return queue->head==queue->tail;
}

//判满
int isfull(queue_t* queue)
{
    if(queue==NULL)
        return 0;

    return (queue->tail+1)%queue->size==queue->head;
    //判满公式1
    //基于位置    t   +1  空间上 追上  h
    //return (queue->tail-queue->head+queue->size)%queue->size==queue->size-1;
    //判满公式2
    //基于长度   满的时候  == size -1

}

//入队
int push_queue(queue_t* queue,int data)
{
    if(queue==NULL||isfull(queue))
        return -1;

    queue->data[queue->tail]=data;

    queue->tail=(queue->tail+1)%queue->size;

    return 0;
}

//出队
int pop_queue(queue_t* queue,int *data)
{
    if(queue==NULL||isempty(queue))
        return -1;

    *data=queue->data[queue->head];

//  queue->data[queue->head]=0;
    queue->head=(queue->head+1)%queue->size;

    return 0;

}

//测试打印1    从0元素 打印到  size-1
int print_queue_test(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    int i;
    for(i=0;i<=queue->size-1;i++)
    {
        printf("%3d ",queue->data[i]);
    }
    printf("\n");

    return 0;
}

//测试打印2    从h  打印到  t
int print_queue_htot(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    int i;
    for(i=queue->head;i!=queue->tail;i=(i+1)%queue->size)
    {
        printf("%3d ",queue->data[i]);
    }
    printf("\n");

    return 0;
}

//长度
int length_queue(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return 0;
    return (queue->tail-queue->head+queue->size)%queue->size;
}

//清空
int clear_queue(queue_t* queue)
{
    if(queue==NULL)
        return -1;

    queue->head=queue->tail=0;

    return 0;
}

//销毁
int destroy_queue(queue_t* queue)
{
    if(queue==NULL)
        return -1;

    free(queue->data);
    free(queue);

    return 0;
}

//真正打印
int print_queue_real(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    queue_t* temp=create_queue(length_queue(queue)+1);

    int data;
    while(!isempty(queue))
    {
        pop_queue(queue,&data);

        printf("%3d ",data);

        push_queue(temp,data);
    }

    printf("\n");
    while(!isempty(temp))
    {
        pop_queue(temp,&data);


        push_queue(queue,data);

    }

    destroy_queue(temp);

    return 0;

}

//真逆打印
int reprint_queue(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    int *stack1=malloc(sizeof(int)*length_queue(queue));

    int top1=-1;

    int *stack2=malloc(sizeof(int)*length_queue(queue));

    int top2=-1;

    int data;

    while(!isempty(queue))
    {
        pop_queue(queue,&data);

        stack1[++top1]=data;

    }
    while(top1!=-1)
    {
        data=stack1[top1--];

        printf("%3d ",data);

        stack2[++top2]=data;
    }
    printf("\n");

    while(top2!=-1)
    {
        data=stack2[top2--];

        push_queue(queue,data);
    }

    free(stack1);

    free(stack2);

    return 0;
}

int main(int argc, const char *argv[])
{
    queue_t* queue=create_queue(15);

    int i;
    for(i=1;i<=15;i++)
    {
        if(push_queue(queue,i)==0)
            print_queue_real(queue);
    }

    int data;
    for(i=1;i<=15;i++)
    {
        if(pop_queue(queue,&data)==0)
        {
            reprint_queue(queue);
        }
    }
    return 0;
}

---

代码 3 : linkstack

#include 
#include 

typedef struct node{
    int data;
    struct node * next;
}linkstack_t;

//创建
linkstack_t* create_stack()
{
    linkstack_t* stack=malloc(sizeof(linkstack_t));
    stack->next=NULL;

    return stack;
}

//判空
int isempty_stack(linkstack_t* stack)
{
    if(stack==NULL)
        return 0;

    return stack->next==NULL;
}

//入栈
int push_stack(linkstack_t* stack,int data)
{
    if(stack==NULL)
        return -1;

    linkstack_t* newnode=create_stack();
    newnode->data=data;

    newnode->next=stack->next;
    stack->next=newnode;

    return 0;
}

//出栈
int pop_stack(linkstack_t* stack,int *data)
{
    if(stack==NULL||isempty_stack(stack))
        return -1;

    linkstack_t* temp=stack->next;

    *data=temp->data;

    stack->next=temp->next;

    free(temp);

    return 0;

}

//假打印
int print_stack_notreal(linkstack_t* stack)
{
    if(stack==NULL||isempty_stack(stack))
        return -1;

    while(stack->next!=NULL)
    {
        printf("%3d ",stack->next->data);
        stack=stack->next;
    }
    printf("\n");

    return 0;
}

//清空
int clear_stack(linkstack_t* stack)
{
    if(stack==NULL)
        return -1;

    int data;
    while(!isempty_stack(stack))
    {
        pop_stack(stack,&data);
    }

    return 0;
}

//销毁
int destroy_stack(linkstack_t* stack)
{
    if(NULL==stack)
        return -1;

    if(!isempty_stack(stack))
        clear_stack(stack);

    free(stack);

    return 0;
}

//真打印
int print_stack_real(linkstack_t* stack)
{
    if(stack==NULL||isempty_stack(stack))
        return -1;

    int data;

    linkstack_t* temp=create_stack();

    while(!isempty_stack(stack))
    {
        pop_stack(stack,&data);

        printf("%3d ",data);

        push_stack(temp,data);
    }
    printf("\n");

    while(!isempty_stack(temp))
    {
        pop_stack(temp,&data);

        push_stack(stack,data);
    }

    destroy_stack(temp);

    return 0;
}

//真逆打印
int reprint_stack_real(linkstack_t* stack)
{
    if(stack==NULL||isempty_stack(stack))
        return -1;

    int data;

    linkstack_t* temp=create_stack();

    while(!isempty_stack(stack))
    {
        pop_stack(stack,&data);

        push_stack(temp,data);
    }

    while(!isempty_stack(temp))
    {
        pop_stack(temp,&data);

        printf("%3d ",data);

        push_stack(stack,data);
    }
    printf("\n");

    destroy_stack(temp);

    return 0;

}

int main(int argc, const char *argv[])
{
    linkstack_t* stack=create_stack();

    int i;

    for(i=1;i<=20;i++)
    {
        push_stack(stack,i);
        print_stack_real(stack);
    }

    int data;
    for(i=1;i<=20;i++)
    {
        pop_stack(stack,&data);

        reprint_stack_real(stack);
    }
    return 0;
}

---

代码 4 : linkqueue

#include 
#include 

typedef struct node{
    int data;
    struct node* next;
}list_t;

typedef struct queuenode{
    list_t* head;
    list_t* tail;
}queue_t;

//创建
queue_t* create_queue()
{
    queue_t* queue=malloc(sizeof(queue_t));

    queue->head=malloc(sizeof(list_t));
    queue->head->next=NULL;

    queue->tail=queue->head;

    return queue;

}

//判空
int isempty(queue_t* queue)
{
    if(queue==NULL)
        return 0;

    return queue->head->next==NULL;

}

//入队
int push_queue(queue_t* queue,int data)
{
    if(queue==NULL)
        return -1;

    list_t* newnode=malloc(sizeof(list_t));
    newnode->next=NULL;
    newnode->data=data;

    queue->tail->next=newnode;

    queue->tail=newnode;

    return 0;
}

//出队
int pop_queue(queue_t* queue,int *data)
{
    //尝试 全部取出数据，再放入几个数据，再打印看一下，删除真的没问题么？？？？
    if(queue==NULL||isempty(queue))
        return -1;

    list_t* temp=queue->head->next;

    if(temp==queue->tail)
        queue->tail=queue->head;

    *data=temp->data;

    queue->head->next=temp->next;

    free(temp);

    return 0;

}

//长度
int length_queue(queue_t* queue)
{

    if(queue==NULL||isempty(queue))
        return 0;

    list_t* temp=queue->head;

    int sum=0;
    while(temp->next!=NULL)
    {
        sum++;
        temp=temp->next;
    }

    return sum;

}

//假打印
int print_queue_notreal(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    list_t* temp=queue->head;

    while(temp->next!=NULL)
    {
        printf("%3d ",temp->next->data);
        temp=temp->next;
    }
    printf("\n");

    return 0;
}

//清空
int clear_queue(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    int data;

    while(!isempty(queue))
    {
        pop_queue(queue,&data);

    }
    return 0;
}

//销毁
int destroy_queue(queue_t* queue)
{
    if(queue==NULL)
        return -1;

    if(!isempty(queue))
        clear_queue(queue);

    free(queue->head);
    free(queue);

    return 0;
}

//真正打印1
int print_queue_real(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    queue_t* temp=create_queue();

    int data;
    while(!isempty(queue))
    {
        pop_queue(queue,&data);

        printf("%3d ",data);

        push_queue(temp,data);
    }
    printf("\n");

    while(!isempty(temp))
    {
        pop_queue(temp,&data);

        push_queue(queue,data);
    }
    destroy_queue(temp) ;

    return 0;
}

//真正打印2
int print_queue_real2(queue_t* queue)
{
    if(queue==NULL||isempty(queue))
        return -1;

    int *stack1=malloc(sizeof(int)*length_queue(queue));

    int top1=-1;

    int *stack2=malloc(sizeof(int)*length_queue(queue));

    int top2=-1;

    int data;
    while(!isempty(queue))
    {
        pop_queue(queue,&data);
        printf("%3d ",data);

        stack1[++top1]=data;

    }

    while(top1!=-1)
    {
        data=stack1[top1--];

        stack2[++top2]=data;
    }

    while(top2!=-1)
    {
        data=stack2[top2--];

        push_queue(queue,data);
    }

    printf("\n");

    free(stack1);
    free(stack2);

    return 0;
}

//真逆打印
int reprint_queue_real(queue_t* queue)//经典面试题：两个栈实现一个队列功能
{
    if(queue==NULL||isempty(queue))
        return -1;

    int *stack1=malloc(sizeof(int)*length_queue(queue));

    int top1=-1;

    int *stack2=malloc(sizeof(int)*length_queue(queue));

    int top2=-1;

    int data;
    while(!isempty(queue))
    {
        pop_queue(queue,&data);
        stack1[++top1]=data;
    }

    while(top1!=-1)
    {
        data=stack1[top1--];
        printf("%3d ",data);
        stack2[++top2]=data;
    }

    while(top2!=-1)
    {
        data=stack2[top2--];
        push_queue(queue,data);
    }

    printf("\n");

    free(stack1);
    free(stack2);

    return 0;
}

int main(int argc, const char *argv[])
{
    queue_t* queue=create_queue();

    int i;
    for(i=1;i<=15;i++)
    {
        push_queue(queue,i*2);
        print_queue_real(queue);
    }

    reprint_queue_real(queue);

    print_queue_real2(queue);
    print_queue_real(queue);
    print_queue_notreal(queue);

    return 0;
}