数据结构之栈

参考：数据结构（C语言版）-严蔚敏

#include <stdio.h>
#include <stdlib.h>

/////////////////  函数结果状态代码  /////////////
#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW -2
typedef int Status;
/////////////////////////////////////////////////

#define STACK_INIT_SIZE 5
#define STACKINCREMENT  10

typedef int SElemType;//定义元素类型


typedef struct{
    SElemType*      base;
    SElemType*      top;
    int             stacksize;
}SqStack;


Status SqStack_InitStack(SqStack& s);
Status SqStack_DestroyStack(SqStack& s);
Status SqStack_ClearStack(SqStack& s);
Status SqStack_IsEmpty(SqStack s);//若栈s是空，返回TRUE，否则返回FALSE
int SqStack_GetLength(SqStack s);
Status SqStack_GetTop(SqStack s, SElemType& e);
Status SqStack_Push(SqStack& s, SElemType e);
Status SqStack_Pop(SqStack& s, SElemType* pe);
Status SqStack_Traverse(SqStack s, Status (*visit)());
Status SqStack_Display(SqStack s);

Status SqStack_InitStack(SqStack& s)
{
    s.base = (SElemType*)malloc(STACK_INIT_SIZE * sizeof(SElemType));
    if (NULL == s.base)
        return ERROR;
    s.top = s.base;
    s.stacksize = STACK_INIT_SIZE;
    return OK;
}

Status SqStack_GetTop(SqStack s, SElemType& e)
{
    if (s.base == s.top)
        return ERROR;
    e = *(s.top - 1);
    return OK;
}

Status SqStack_Push(SqStack& s, SElemType e)
{
    if (s.top - s.base >= s.stacksize)
    {//栈满，追加存储空间
        s.base = (SElemType*)realloc(s.base, (s.stacksize + STACKINCREMENT)*sizeof(SElemType));
        if (!s.base)
            return ERROR;
        s.top = s.base + s.stacksize;
        s.stacksize += STACKINCREMENT;
    }
    *s.top = e;
    s.top++;
    return OK;
}

Status SqStack_Pop(SqStack& s, SElemType* pe)
{
    if (s.top == s.base)
        return ERROR;
    --s.top;
    if (nullptr != pe)
        *pe = *(s.top);
    return OK;
}

Status SqStack_IsEmpty(SqStack s)
{
    return s.base == s.top ? TRUE : FALSE;
}

int SqStack_GetLength(SqStack s)
{
    return s.top - s.base;
}

Status SqStack_Traverse(SqStack s, Status(*visit)())
{
    if (s.top == s.base)
        return ERROR;
    for (SElemType* p=s.base; p < s.top; p++)
    {
        visit();
    }
}



Status SqStack_Display(SqStack s)
{
    if (s.top == s.base)
        return ERROR;
    for (SElemType* p = s.base; p < s.top; p++)
    {
        printf("%d ", *p);
    }
    printf("\n");
    return OK;
}

#endif

#include <iostream>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include "sqstack.h"
//using namespace std;



//将10进制 转 8进制
int  conversion(int n)
{
    int ret = 0;
    SqStack s;
    SqStack_InitStack(s);

    while (n)
    {
        SqStack_Push(s, n % 8);
        n = n / 8;
    }

    while (!SqStack_IsEmpty(s))
    {
        SElemType e;
        SqStack_Pop(s, &e);
        int len = SqStack_GetLength(s);
        ret += (int)pow(10,len) * e;
    }
    return ret;
}

//括号的匹配
bool match_brackets(const char* str){
    if(NULL == str || strlen(str)==0)
        return false;
    const char* k1 = "([{<";
    const char* k2 = ")]}>";
    SqStack s = { 0 };
    SqStack_InitStack(s);
    int nLen = strlen(str);
    for(int i=0; i<nLen; ++i){
        char c = str[i];
        if(strchr(k1,c)){
            SqStack_Push(s, c);
        }
        else if(strchr(k2,c)){
            int elem;
            if(OK == SqStack_Pop(s, &elem)){
                const int nPos = strchr(k1,elem) - k1;
                const int nPos2 = strchr(k2,c) - k2;
                if(nPos != nPos2){
                    return false;
                }
            }else{
                return false;
            }
        }
        else{
            //return false;
        }
    }
    if(TRUE == SqStack_IsEmpty(s))
        return true;
    else
        return false;
}


int main()
{
//    cout << "Hello World!" << endl;
//    for(int i=0;i<10;++i){
//        for(int j=0; j<10; ++j){
//            cout << maze[i][j] << ' ';
//        }
//        cout << '\n';
//    }

//    SqStack s = { 0 };
//     SqStack_InitStack(s);
//     SqStack_Push(s, 5);
//     SqStack_Push(s, 6);
//     SqStack_Push(s, 7);
//     SqStack_Pop(s, NULL);
//     SqStack_Push(s, 8);
//     SqStack_Push(s, 9);
//     SqStack_Push(s, 10);
//     SqStack_Push(s, 11);
//     SqStack_Push(s, 12);
//     SqStack_Display(s);

//     int res = conversion(8);
//     printf("%d\n", res);

    const char* s = "{(){}[0)][]}";
    std::cout << (match_brackets(s)?"ok":"bad") << '\n';

    return 0;
}

迷宫求解

SqStack.h

#ifndef SQSTACK_H
#define SQSTACK_H


#include <stdio.h>
#include <stdlib.h>

/////////////////  函数结果状态代码  /////////////
#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVER_FLOW -2
typedef int Status;
/////////////////////////////////////////////////

//------------ 元素类型 begin --------------
typedef struct{
    int i; int j;
}PosType;
//定义元素类型
typedef struct{
    int     ord;        //通道块在路径上的"序号"
    PosType seat;       //通道块在迷宫中的“坐标位置”
    int     di;         //从此通道块走向下一通道块的“方向” 东1南2西3北4
}SElemType;
//------------ 元素类型 end --------------

//----------------------- 栈的顺序存储表示 --------------------


#define STACK_INIT_SIZE 5
#define STACKINCREMENT  10



typedef struct{
    SElemType*      base;
    SElemType*      top;
    int             stacksize;
}SqStack;


Status SqStack_InitStack(SqStack& s);
Status SqStack_DestroyStack(SqStack& s);
Status SqStack_ClearStack(SqStack& s);
Status SqStack_IsEmpty(SqStack s);//若栈s是空，返回TRUE，否则返回FALSE
int SqStack_GetLength(SqStack s);
Status SqStack_GetTop(SqStack s, SElemType& e);
Status SqStack_Push(SqStack& s, SElemType e);
Status SqStack_Pop(SqStack& s, SElemType* pe);
Status SqStack_Traverse(SqStack s, Status (*visit)(SElemType elem));
Status SqStack_Display(SqStack s);

Status SqStack_InitStack(SqStack& s)
{
    s.base = (SElemType*)malloc(STACK_INIT_SIZE * sizeof(SElemType));
    if (NULL == s.base)
        return ERROR;
    s.top = s.base;
    s.stacksize = STACK_INIT_SIZE;
    return OK;
}

Status SqStack_GetTop(SqStack s, SElemType& e)
{
    if (s.base == s.top)
        return ERROR;
    e = *(s.top - 1);
    return OK;
}

Status SqStack_Push(SqStack& s, SElemType e)
{
    if (s.top - s.base >= s.stacksize)
    {//栈满，追加存储空间
        s.base = (SElemType*)realloc(s.base, (s.stacksize + STACKINCREMENT)*sizeof(SElemType));
        if (!s.base)
            return ERROR;
        s.top = s.base + s.stacksize;
        s.stacksize += STACKINCREMENT;
    }
    *s.top = e;
    s.top++;
    return OK;
}

Status SqStack_Pop(SqStack& s, SElemType* pe)
{
    if (s.top == s.base)
        return ERROR;
    --s.top;
    if (NULL != pe)
        *pe = *(s.top);
    return OK;
}

Status SqStack_IsEmpty(SqStack s)
{
    return s.base == s.top ? TRUE : FALSE;
}

int SqStack_GetLength(SqStack s)
{
    return s.top - s.base;
}

Status SqStack_Traverse(SqStack s, Status(*visit)(SElemType elem))
{
    if (s.top == s.base)
        return ERROR;
    for (SElemType* p=s.base; p < s.top; p++)
    {
        visit(*p);
    }
    return OK;
}



//Status SqStack_Display(SqStack s)
//{
//    if (s.top == s.base)
//        return ERROR;
//    for (SElemType* p = s.base; p < s.top; p++)
//    {
//        printf("%d ", *p);
//    }
//    printf("\n");
//    return OK;
//}


#endif // SQSTACK_H

main.cpp

#include <iostream>
#include "sqstack.h"

using std::cout;

//#define ROW 10
//#define COL 10
const int ROW =10;
const int COL =10;
typedef int MazeType[ROW][COL];

MazeType maze = {
    {1,1,1,1,1,1,1,1,1,1},
    {1,0,0,1,0,0,0,1,0,1},
    {1,0,0,1,0,0,0,1,0,1},
    {1,0,0,0,0,1,1,0,0,1},
    {1,0,1,1,1,0,0,0,0,1},
    {1,0,0,0,1,0,0,0,0,1},
    {1,0,1,0,0,0,1,0,0,1},
    {1,0,1,1,1,0,1,1,0,1},
    {1,1,0,0,0,0,0,0,0,1},
    {1,1,1,1,1,1,1,1,1,1}

};

Status displaySElemType(SElemType elem){
    cout << "(" << elem.seat.i << ',' << elem.seat.j << ")\n";
    return OK;
}

bool HasFootPrint(PosType p){
    if(2 == maze[p.i][p.j])
        return true;
    return false;
}

void FootPrint(MazeType maze, PosType p){
    maze[p.i][p.j] = 2;
}

bool Pass(MazeType maze, PosType p){
    if(1 == maze[p.i][p.j] || HasFootPrint(p))
        return false;
    return true;
}

PosType NextPos(PosType p, int di){
    int i1 = p.i, j1 = p.j;

    switch (di) {
    case 1: //东
        j1 = p.j + 1;
        break;
    case 2: //南
        i1 = p.i + 1;
        break;
    case 3: //西
        j1 = p.j - 1;
        break;
    case 4: //北
        i1 = p.i - 1;
        break;
    default:
        break;

    }

    if(i1 < 0 )
        i1 = 0;
    else if(i1 > ROW-1)
        i1 = ROW-1;
    if(j1 < 0)
        j1 = 0;
    else if(j1 > COL-1)
        j1 = COL-1;

    PosType r = {i1, j1};

    return r;
}

bool PosTypeEqual(PosType p1, PosType p2){
    if(p1.i == p2.i && p1.j == p2.j)
        return true;
    return false;
}

void MarkPrint(MazeType maze, PosType p){
    maze[p.i][p.j] = 3;//表示所有方向都尝试了，不能通过
}

Status MazePath(MazeType maze, PosType start, PosType end, SqStack& s){
//若迷宫maze中存在从入口start到出口end的通道，则求得一条存放在栈中（从栈底到栈顶），并返回TRUE，否则返回FALSE
    PosType curPos = start;
    int curstep = 1;
    do{
        if(Pass(maze, curPos)){//当前位置可以通过，也未曾走过
            FootPrint(maze,curPos);//留下足迹
            SElemType e = {curstep,curPos,1};
            SqStack_Push(s,e);
            if(curPos.i == end.i && curPos.j==end.j)
                return TRUE;
            curPos = NextPos(curPos,1);//下一位置是当前位置的东邻
            ++curstep;
        }
        else{
            if(!SqStack_IsEmpty(s)){
                SElemType e;
                SqStack_Pop(s, &e);
                while(4 == e.di && !SqStack_IsEmpty(s)){
                    MarkPrint(maze, e.seat);
                    SqStack_Pop(s, &e);
                }
                if(e.di < 4){
                    e.di++;
                    SqStack_Push(s,e);
                    curPos = NextPos(e.seat, e.di);//换一个方向
                }
            }
        }
    }while(!SqStack_IsEmpty(s));

    return FALSE;
}

int main()
{
    for(int i=0;i<ROW;++i){
        for(int j=0; j<COL; ++j){
            cout << maze[i][j] << ' ';
        }
        std::cout << '\n';
    }

    SqStack s;
    SqStack_InitStack(s);
    PosType start = {1,1}, end={8,8};
    MazePath(maze,start,end,s);
    SqStack_Traverse(s,displaySElemType);

    for(int i=0;i<ROW;++i){
        for(int j=0; j<COL; ++j){
            cout << maze[i][j] << ' ';
        }
        std::cout << '\n';
    }
    return 0;
}

/*
1 1 1 1 1 1 1 1 1 1
1 0 0 1 0 0 0 1 0 1
1 0 0 1 0 0 0 1 0 1
1 0 0 0 0 1 1 0 0 1
1 0 1 1 1 0 0 0 0 1
1 0 0 0 1 0 0 0 0 1
1 0 1 0 0 0 1 0 0 1
1 0 1 1 1 0 1 1 0 1
1 1 0 0 0 0 0 0 0 1
1 1 1 1 1 1 1 1 1 1
(1,1)
(1,2)
(2,2)
(3,2)
(3,1)
(4,1)
(5,1)
(5,2)
(5,3)
(6,3)
(6,4)
(6,5)
(7,5)
(8,5)
(8,6)
(8,7)
(8,8)
1 1 1 1 1 1 1 1 1 1
1 2 2 1 3 3 3 1 0 1
1 0 2 1 3 3 3 1 0 1
1 2 2 3 3 1 1 0 0 1
1 2 1 1 1 0 0 0 0 1
1 2 2 2 1 0 0 0 0 1
1 0 1 2 2 2 1 0 0 1
1 0 1 1 1 2 1 1 0 1
1 1 0 0 0 2 2 2 2 1
1 1 1 1 1 1 1 1 1 1
*/

--------------

posted @ 2022-10-25 14:18 htj10 阅读(24) 评论(0) 编辑收藏举报

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数据结构之栈

迷宫求解

公告

htj10

心 灵 欢喜 快乐 Stay Hungry, Stay Foolish.

数据结构之栈

迷宫求解

公告

心　　灵

欢喜快乐

Stay Hungry, Stay Foolish.