使用C++List出现读取访问权限冲突的问题。求解

我创建了一个Animation类型的List用来放所有的Animation对象。animation类的实现如下

 #include "cAnimation.h"

Animation::Animation(int imgNum, TCHAR *fileName, long  frameSpeed, int xPos, int yPos)
{
    TCHAR path[100];

    m_AnimationImg = new CxImage [imgNum];//图片数组存放动画帧
    m_HeadImg = new CxImage();//保存图片数组头指针
    m_HeadImg = m_AnimationImg;

    for (int i=0;i<imgNum;i++)//添加动画帧到图片数组
    {
        swprintf_s(path, L"%s%d.png", fileName, i);
        m_AnimationImg->Load(path, CXIMAGE_FORMAT_PNG);
        m_AnimationImg++;
    }

    m_AnimationImg = m_HeadImg;

    m_frameSpeed = frameSpeed;//图片播放速度

    m_xPos = xPos;//动画显示坐标
    m_yPos = yPos;

    m_ImgNum = imgNum;//图片数量

    QueryPerformanceFrequency(&m_Frequence);//频率
    QueryPerformanceCounter(&m_StartCounter);//起始计数器
}

bool Animation::Draw(HDC m_hdc,UINT xPos,UINT yPos)
{
    static long m_time = 0,lastTime=0;//时间间隔
    QueryPerformanceCounter(&m_CurCounter);//当前计数器
    m_time = (m_CurCounter.QuadPart - m_StartCounter.QuadPart) * 1000 / m_Frequence.QuadPart;


    m_AnimationImg->Draw(m_hdc,xPos,yPos);//绘制当前图片

    //保证循环播放图片
    int static i = 0;
    if (i == m_ImgNum)
    {
        i = 0; m_AnimationImg = m_HeadImg;
    }

    //设置图片播放速度
    if (m_time - lastTime >= m_frameSpeed)
    {
        lastTime = m_time;
        i++;
        m_AnimationImg ++;
    }
    return true;
}
bool Animation::Draw(HDC m_hdc)
{
    static long m_time = 0, lastTime = 0;
    QueryPerformanceCounter(&m_CurCounter);
    m_time = (m_CurCounter.QuadPart - m_StartCounter.QuadPart) * 1000 / m_Frequence.QuadPart;


    m_AnimationImg->Draw(m_hdc, m_xPos, m_yPos);

    int static i = 0;
    if (i == m_ImgNum)
    {
        i = 0; m_AnimationImg = m_HeadImg;
    }

    if (m_time - lastTime >= m_frameSpeed)
    {
        lastTime = m_time;
        i++;
        m_AnimationImg++;
    }

    return true;
}

bool Animation::Clean()
{

    return true;
}

Animation::~Animation()
{
    //delete m_HeadImg;
    //delete [m_ImgNum] m_AnimationImg;

}

Animation::Animation()
{

}
bool Animation::Update(int xPos,int yPos)
{


    m_xPos = xPos;
    m_yPos = yPos;
    return true;
}

list定义如下

 typedef list<Animation> AnimationList;
    AnimationList m_AllAnimation;

之后在push_back()了两个animation;

如果只放一个animation不会出现读取访问权限冲突的问题。放两个animation进去,会是这样:第一个animation开始播放,第二个animation只绘制出了第一张图片,当第一个animation播放完就会出现问题图片说明

list的遍历

 bool AnimationMgr::Draw(HDC hdc)
{

    list<Animation>::iterator aniIterator;

    for (aniIterator = m_AllAnimation.begin();aniIterator != m_AllAnimation.end();++aniIterator)
    {
        (*aniIterator).Draw(hdc);
    }
    return true;
}

请问是什么原因呢?

4个回答

已解决。将animation里面的图片数组使用下标方式访问。而不是指针方式

求解答。写代码卡在这地方了。

这种引发断点的最好办法是进行调试,还有你代码看不出什么问题

(*aniIterator).Draw(hdc);   //记得清除第一个,然后在绘制第二个。。
qq_33537854
猫牌铅笔 好的。谢谢
2 年多之前 回复
shen_wei
华夏文明,永续前进,进化不止,飞升无限! 最后的方式自己单步运行,看看走到具体那里出错,才是关键!!!
2 年多之前 回复
qq_33537854
猫牌铅笔 我现在把代码改成这样子: list<Animation>::iterator aniIterator; aniIterator = m_AllAnimation.begin(); (*aniIterator).Draw(hdc); 只画list里面的第一个animation,可是还是会出读取访问异常。但是如果list里面只有一个animation又不会出错,是怎么回事呢?
2 年多之前 回复
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我的业务方法:rn[code=java]rn@SuppressWarnings("unchecked")rn @Overridern public List getGoodsUseGoodsName(String goodsName) rnrn System.out.println("get goods with goodsnam");rn System.out.println(goodsName);rn List list = sessionFactoryrn .getCurrentSession()rn .createQuery(rn "from t_goods tg where tg.goodsName=" + "'"+goodsName+"'")rn .list();rn rn return list;rn rnrn[/code]rn我的action:rn[code=java]rnrnList list = userService.isExistUser(username, password);rn UserInfo u = (UserInfo) list.get(0);rn System.out.println(u.getAdmin());rn[/code]rn出现下列错误0.0.。。。。。。。。。。。。。。。rn[img=https://img-bbs.csdn.net/upload/201310/21/1382363605_508040.png][/img]rn
使用list control出现的问题?
[code=C/C++]BOOL CDialogMain:: OnInitDialog()rnrn CDialog::OnInitDialog();rn CMenu menu;rn menu.LoadMenu(IDR_MENU1);rn SetMenu(&menu);rn getMacstring();rn //m_List.ModifyStyle(LVS_EDITLABELS,0);rn //m_List.ModifyStyle(0,LVS_SHOWSELALWAYS);rn //m_List.SetExtendedStyle(LVS_EX_GRIDLINES|LVS_EX_FULLROWSELECT|LVS_EX_ONECLICKACTIVATE);rn m_List.InsertColumn(0, "MAC地址", LVCFMT_LEFT, 150);rn m_List.InsertColumn(1, "正常帧", LVCFMT_LEFT, 150);rn return TRUE;rn[/code]rn怎么使用m_List.InsertColumn怎么运行后,list control不显示列呀?
Linux C使用Mysql出现错误!求解
菜鸟新手提问,还望大神不吝赐教。rnrn第一次使用Mysql,按照网上的例子链接数据库rn使用gcc -I/usr/include/mysql demo.c -L/usr/lib/mysql -lmysqlclient -o demo可以正常链接。rn但是当我把命令加载到另一个C文件(已经加入头文件mysql.h)rn MYSQL my_connection;rn mysql_init(&my_connection);rn mysql_real_connect(&my_connection, "localhost","root", "123456", "tempdata", 0, NULL, 0) ;rn unsigned char *data;rn char query[256];rn coap_get_data(request, &data_len, &data);rn if(data_len == 0)rn printf("data error:can't get data!\n");rn if(data_len != 0)rn printf("temp:%s\n",data);rn char* pEnd;rn float f1;rn f1 = strtof (data, &pEnd);rn printf("changed%.2f\n",f1);rn sprintf(query,"INSERT INTO temp(data) VALUES('%.2f')",f1);rn mysql_query(&my_connection, query);rnrnrn[color=#FF0000]并且在makefile中加入库[/color],下面是完整到makefile,其中红色是我增加的mysql库添加的,这样去Make执行会出现蓝色字体到错误,求解??是我增加的方式有错还是其他?请教学。rnVERSION:=4.1.2rnrn# toolsrnrnSHELL = /bin/shrnMKDIR = mkdirrnrnabs_builddir = /home/lyj/libcoap-master/examplesrntop_builddir = ..rntop_srcdir = ..rn# files and flagsrnPROGRAMS:=coap-server coap-client rd #etsi_iot_01 tinyrnSOURCES:= tiny.c client.c server.c rd.c etsi_iot_01.crnOBJECTS:= $(patsubst %.c, %.o, $(SOURCES))rn#CFLAGS:=-g -Wall -ansi -pedantic -I..rnCFLAGS:=-g -Wall -g -O2 [color=#FF0000]-I/usr/include/mysql/[/color]rnCPPFLAGS:=-I$(top_srcdir) -DWITH_POSIXrnDISTDIR?=$(top_builddir)/libcoap-4.1.2rnFILES:=Makefile.in $(SOURCES)rnLDFLAGS:=-L$(top_builddir)rnLDLIBS:=-lcoap -lcoap rnlibcoap =$(top_builddir)/libcoap.arnrn.PHONY: clean distcleanrnrn.SUFFIXES:rn.SUFFIXES: .c .ornrnall: $(PROGRAMS)rnrncheck: rn echo DISTDIR: $(DISTDIR)rn echo top_builddir: $(top_builddir)rnrntiny: tiny.o $(libcoap)rn $(CC) -o $@ $< $(LDFLAGS)rnrncoap-client: client.o $(libcoap)rn $(CC) -o $@ $< $(LDFLAGS) $(LDLIBS)rnrncoap-server: server.o $(libcoap)rn $(CC) -o $@ $< $(LDFLAGS) $(LDLIBS)[color=#FF0000] -lmysqlclient[/color]rnrnclean:rn @rm -f $(PROGRAMS) $(OBJECTS)rnrndistclean: cleanrn @rm -rf $(DISTDIR)rn @rm -f *~ rnrndist: $(FILES)rn test -d $(DISTDIR)/examples || mkdir $(DISTDIR)/examplesrn cp $(FILES) $(DISTDIR)/examplesrnrn[color=#0000FF]rnlyj@lyj-Inspiron-5521:~/libcoap-master/examples$ makerncc -g -Wall -g -O2 -I/usr/include/mysql/ -I.. -DWITH_POSIX -c -o server.o server.crnIn file included from ../resource.h:18:0,rn from server.c:28:rn../t_list.h:105:1: error: conflicting types for ‘list_add’rn list_add(list_t the_list, void *item) rn ^rnIn file included from /usr/include/mysql/mysql.h:61:0,rn from server.c:26:rn/usr/include/mysql/my_list.h:30:14: note: previous declaration of ‘list_add’ was herern extern LIST *list_add(LIST *root,LIST *element);rn ^rn../t_list.h:111:18: error: expected ‘)’ before ‘the_list’rn list_push(list_t the_list, void *item) rn ^rn/usr/include/mysql/my_list.h:39:25: note: in definition of macro ‘list_push’rn #define list_push(a,b) (a)=list_cons((b),(a))rn ^rn/usr/include/mysql/my_list.h:40:21: error: expected identifier or ‘(’ before ‘’ tokenrn #define list_pop(A) LIST *old=(A); (A)=list_delete(old,old); my_free(old); rn ^rn../t_list.h:116:1: note: in expansion of macro ‘list_pop’rn list_pop(list_t the_list) rn ^rnIn file included from ../resource.h:18:0,rn from server.c:28:rn../t_list.h:116:27: error: expected identifier or ‘(’ before ‘’ tokenrn list_pop(list_t the_list) rn ^rnIn file included from /usr/include/mysql/mysql.h:61:0,rn from server.c:26:rn../t_list.h: In function ‘list_insert’:rn/usr/include/mysql/my_list.h:39:42: warning: passing argument 2 of ‘list_cons’ from incompatible pointer type [-Wincompatible-pointer-types]rn #define list_push(a,b) (a)=list_cons((b),(a))rn ^rn../t_list.h:128:5: note: in expansion of macro ‘list_push’rn list_push(the_list, newitem);rn ^rn/usr/include/mysql/my_list.h:32:14: note: expected ‘LIST * aka struct st_list *’ but argument is of type ‘list_t aka void **’rn extern LIST *list_cons(void *data,LIST *root);rn ^rn/usr/include/mysql/my_list.h:39:27: warning: assignment from incompatible pointer type [-Wincompatible-pointer-types]rn #define list_push(a,b) (a)=list_cons((b),(a))rn ^rn../t_list.h:128:5: note: in expansion of macro ‘list_push’rn list_push(the_list, newitem);rn ^rnserver.c: In function ‘hnd_put_puttest’:rnserver.c:200:23: warning: pointer targets in passing argument 1 of ‘strtof’ differ in signedness [-Wpointer-sign]rn f1 = strtof (data, &pEnd);rn ^rnIn file included from server.c:11:0:rn/usr/include/stdlib.h:172:14: note: expected ‘const char * restrict’ but argument is of type ‘unsigned char *’rn extern float strtof (const char *__restrict __nptr,rn ^rn: recipe for target 'server.o' failedrnmake: *** [server.o] Error 1[/color]rnrnrnrnrnrn
Ubuntu 解决list冲突问题
Ubuntu安装一些软件后,会发生更新源的list文件冲突问题。解决方法就是删除现在的更新源list文件,然后重新生成一个。 1. 删除现在的list文件sudo rm -rf /var/lib/apt/lists/* 重建新的list文件 sudo apt-get update另: 只删除引起错误的那几个文件可以。
List 的回收问题 求解
[code=csharp]rnstatic List listObj = new List();rn..............rnvoid fun()rnrn MyObj myObj1=new MyObj();rn MyObj myObj2=new MyObj();rn listObj.Add(myObj1);rn listObj.Add(myObj2);rn listObj.Clear(); //注意这行rnrn[/code]rnrn在listObj.Clear();后 myObj1 myObj2这两个对象会不会被释放rn如果不执行listObj.Clear(); 那么myObj1 myObj2的存活周期是否和listObj一样?rn如果执行了listObj[0]=null; 0对应的是myObj1 那么myObj1会不会被释放rn谢谢
List,问题,求解啊!
List str2 = new List();rn str2 = BuildSQLString.GetDataTable("newadd", "content");rnfor (int i = 0; i < 2;++i)rn rn str = str.Replace("$content$", str2[i].ToString());rn rn tryrn rn sw = new StreamWriter(Server.MapPath("~/html/") + fileName, false, code);rn sw.Write(str);rn sw.Flush();rn rn catch (Exception ex)rn rn throw ex;rn rn finallyrn rn sw.Close();rnrn rn rnstr2[i],为什么总是str2[0]里的值,i自加后,str2[i]里的i还是没变化!!!!
JAVA循环,list问题,求解
for (int i = 0; i < cLine.length; i++) //循环长度为2rn line = ReadTxtConfig.commaSplitStr(cLine[i], ",");rn items.setItem(line[0]); //1009,1010 2个值rn rn list.add(items);rnlist.add 放在里面就会输出1010,1010rnlist.add 放外面输出1010rn请问我怎么把1009和1010都输出出来啊。
引发了异常: 读取访问权限冲突。 opc.m_pErrors 是 nullptr。
刚刚接触C++,刚刚接触opc。。。[img=https://forum.csdn.net/PointForum/ui/scripts/csdn/Plugin/003/onion/1.gif][/img]rn用MFC写opc客户端,想实现对opc服务器不停的读数据,已实现单次读,要开一个线程实现循环读数(不然界面会卡死),在写线程函数时遇到报错如下:[img=https://img-bbs.csdn.net/upload/201805/05/1525510000_220108.png][/img]rn代码如下:rn线程函数代码rn[img=https://img-bbs.csdn.net/upload/201805/05/1525510052_828084.png][/img]rnrn类定义rn[img=https://img-bbs.csdn.net/upload/201805/05/1525510106_736735.png][/img]rnrn求大佬解救。解决这一错误,或别的方法实现循环读数而不致界面卡死。
引发了未经处理的异常:读取访问权限冲突
请大神指教一下,调试显示 q 是nullptr,谢谢了rnrnrn```rn # include rn# include //exitrn# include rnrntypedef struct Nodernrn int data;rn struct Node *next;rnNode, *LinkList;rnrnLinkList Create_List(LinkList &L)rnrn Node *p, *q;rn int i, n;rn int data;rn L = (LinkList)malloc(sizeof(Node));rn q = L;rn printf("链表的长度为:");rn scanf_s("%d", &n);rn for (i = 0; idata = data;rn q->next = p;rn q = p;rn rn q->next = NULL;rn return L;rnrnrnLinkList Merge_List(LinkList La, LinkList Lb)rnrn Node *p, *q;rn LinkList L;rn L = (LinkList)malloc(sizeof(Node));rn L = NULL;rn p = La->next;rn q = Lb->next;rn while (La&&Lb)rn rn if (La->datadata)rn rn L = p;rn p = p->next;rn rn elsern rn L = q;rn q = q->next;rn rn rn L = p ? p : q;rn return L;rnrnrnLinkList Reverse_List(LinkList L)rnrn Node *p, *q;rn p = L->next;rn L->next = NULL;rn while (p != NULL)rn rn q = p->next;rn p->next = L->next;rn L->next = p;rn p = q;rn rn return L;rnrnrnrnvoid Print_List(LinkList L)rnrn Node *p = L->next;rn while (p != NULL)rn rn printf("%d", p->data);rn p = p->next;rn rn printf("\n");rnrnrnrnint main()rnrn LinkList La, Lb;rn La = (LinkList)malloc(sizeof(Node));rn Lb = (LinkList)malloc(sizeof(Node));rn Create_List(La);rn Create_List(Lb);rn Print_List(Merge_List(La, Lb));rnrn```rnrn
引发了异常: 读取访问权限冲突。 p 是 0xCCCCCCCC。
// test.cpp : 定义控制台应用程序的入口点。 //输入一个链表,反转链表后,输出链表的所有元素。 #include &quot;stdafx.h&quot; #include &amp;lt;iostream&amp;gt; using namespace std; struct ListNode { int val; struct ListNode* next; ListNode(int n) { val...
求助!引发了异常: 读取访问权限冲突。s 是 0xCCCCCCCC。
#include "stdio.h" rn#include "math.h"rn#include "stdlib.h" //exit() rntypedef int DataType;rn#include "malloc.h" //malloc() rnrntypedef struct Nodernrn DataType data;rn struct Node *next;rn SLNode;rnrnvoid ListInitiate(SLNode **head)rnrn if ((*head = (SLNode *)malloc(sizeof(SLNode))) == NULL) exit(1);rn (*head)->next = NULL;rnrnrn//在带头节点的单链表head的第i(0<=i<=size)个结点前插入 rnint ListInsert(SLNode * head, int i, DataType x)rnrn SLNode *p, *q;rn int j;rnrn p = head;rn j = -1;rn //其实就是i-1-(-1)=i次,把p指针移到第i-1个结点上,因为结点从0开始 rn while (p->next != NULL && j < i - 1)rn rn p = p->next;rn j++;rn rnrn if (j != i - 1)rn rn printf("insert error !/n");rn return 0;rn rnrn if ((q = (SLNode *)malloc(sizeof(SLNode))) == NULL) exit(1);rn q->data = x;rnrn q->next = p->next;rn p->next = q;rn return 1;rnrnrnrn//释放动态申请的内存空间 rnvoid Destroy(SLNode * *head)rnrn SLNode *p, *p1;rn p = *head;rn while (p != NULL)rn rn p1 = p;rn p = p->next;rn free(p1);rn rn *head = NULL;rnrnvoid Buildloop(SLNode *head, SLNode *head2, DataType m, DataType n)rnrn int flag1 = 0, flag2 = 0;rn SLNode *p, *q, *r, *s;rn p = head->next;rn q = head2;rn rn while (p != NULL)rn rn if (p->data ==m ) rn flag1++;rn if (flag1 == 1) rn r = (SLNode *)malloc(sizeof(SLNode));rn r->data = m;rn r->next = p->next;rn rnrn rn rn if (p->data == n) rn flag2++;rn if (flag2 == 1) rn s = (SLNode *)malloc(sizeof(SLNode));rn s->data = n;rn s->next = p->next;rn //s = p;rn rn if (flag1 == 1 && flag2 == 1) rn break;rn rn rn /*if (s->next = NULL) rn s->next = r;rn */rnrn head2->next = s->next;rn s->next = r;rnrn while (q->next != NULL) rn q = q->next;rn rn q->next = r;rnrnrnrn rnrnint FindLoopNode(SLNode *head, int j)rnrn int i = j, begin = 1;rn SLNode *fast = head, *slow = head;rn for (i; i > 0; i--) rn fast = fast->next;rn rn slow = head;rn while (slow != fast) rn begin++;rn slow = slow->next;rn fast = fast->next;rn rn return begin;rnrnrnrnint IsExitsloop(SLNode *head)rnrn SLNode *slow = head;rn SLNode *fast = head;rn int i, j = 1;rnrn while (fast&&fast->next)rn rn slow = slow->next;rn fast = fast->next->next;rn if (slow == fast)break;rn rn if (fast == NULL || fast->next == NULL) rn printf("该链表不存在环!\n");rn rn else rn printf("该链表存在环!\n");rn while (fast&&fast->next) rn slow = slow->next;//fast与slow相遇后,slow并没有遍历完链表,继续遍历rn j++;rn if (slow->next == fast)break;rn rn rn i = FindLoopNode(head, j);rn printf("环的起始位置为:%d\n", i);rn printf("环的结束位置为:%d\n", j + i - 1);rn return 0;rnrnint ListLength(SLNode *head)rnrn SLNode *slow = head->next, *fast = head->next;rn int length = 1;rn while (fast&&fast->next) rn slow = slow->next;rn fast = fast->next->next;rn if (slow == fast)rn rn while (fast&&fast->next)rn rn slow = slow->next;rn length++;rn if (slow->next == fast)break;rn rn break;rn rn rn return length;rnrnvoid ReList(SLNode *head)rnrn SLNode *p = head, *q = head;rn int length = ListLength(head);rn for (; length > 0; length--)p = p->next;rn while (p != q)rn rn q = q->next;rn if (p->next == q)rn rn p->next = NULL;rn break;rn rn p = p->next;rn rnrnvoid IsIntersect(SLNode *head, SLNode *head2)rnrn SLNode *p, *q;rn p = head;rn q = head2;rn int i = 0, flag = 0;rn while (p->next != NULL)rn rn i++;rn p = p->next;rn while (q->next != NULL)rn rn q = q->next;rn if (p == q) rn flag = 1;rn printf("链表存在相交位置,位置为%d\n",i);rn break;rn rn rn if (flag == 1)break;rn rn if (flag != 1)rn printf("链表不相交!");rnrn#pragma oncern[img=https://img-bbs.csdn.net/upload/201705/25/1495708709_286227.png][/img][img=https://img-bbs.csdn.net/upload/201705/25/1495708718_161184.png][/img]rn
双系统出现冲突的问题
我先安装WIN XP HOME,接着安装了WIN 2000 SERVER版本,也安装了WIN XP故障恢复控制台,接着WIN XP就启动不起来,出现了以下错误提示:rn stop:C000021a unknown Hard Errorrn Unknown Hard Errorrn系统电源指示灯灭了,这种故障应该怎么处理?我需要不重装系统的解决方法
c++ primer中的一个练习push_back时读取访问权限冲突
[code=c]rn#ifndef STRBLOBrn#define STRBLOBrn#include rn#include rn#include rn#include rn#include rnusing std::vector;rnusing std::string;rnrnclass StrBlobPtr;rnclass StrBlob rn friend class StrBlobPtr;rnpublic:rn typedef vector::size_type size_type;rn StrBlob();rn StrBlob(std::initializer_list il);rn size_type size()const return data->size(); ;rn bool empty()const return data->empty(); ;rn //添加和删除元素rn void push_back(const string &t) data->push_back(t); ;rn void pop_back();rn //元素访问rn string& front();rn string& front() const;rn string& back();rn string& back() const;rn //返回指向首元素和尾后元素的StrBlobPtrrn StrBlobPtr begin();rn StrBlobPtr end();rnprivate:rn std::shared_ptr> data;rn void check(size_type i, const string& msg) const;rn;rnrnrnStrBlob::StrBlob() ;rnStrBlob::StrBlob(std::initializer_list il) :rn data(std::make_shared>(il)) ;rnrnvoid StrBlob::pop_back()rnrn check(0, "pop_back on empty vector");rn data->pop_back();rnrnrnstring& StrBlob::front()rnrn check(0, "front on empty vector");rn return data->front();rnrnstring& StrBlob::front() constrnrn check(0, "front on empty vector");rn return data->front();rnrnrnstring& StrBlob::back()rnrn check(0, "back on empty vector");rn return data->back();rnrnstring& StrBlob::back() constrnrn check(0, "back on empty vector");rn return data->back();rnrnrnvoid StrBlob::check(size_type i, const string& msg) constrnrn if (i > data->size())rn throw std::out_of_range(msg);rnrnrnrnrnclass StrBlobPtr rnpublic:rn StrBlobPtr() :curr(0) rn StrBlobPtr(StrBlob &a, size_t sz = 0) :rn wptr(a.data), curr(sz) rn std::string& deref()const;rn StrBlobPtr& incr(); //前缀递增rnprivate:rn //若检查成功,check返回一个指向vector的shared_ptrrn std::shared_ptr>rn check(std::size_t, const std::string&)const;rn //保存一个weak_ptr,意味着底层vector可能会被销毁rn std::weak_ptr >wptr;rn std::size_t curr; //在数组中的位置rn;rnrnstd::shared_ptr>rnStrBlobPtr::check(std::size_t i, const string &msg)constrnrn auto ret = wptr.lock(); //wptr所指的vector还存在吗rn if (!ret)rn throw std::runtime_error("unbound StrBlobPtr");rn if (i >= ret->size())rn throw std::out_of_range(msg);rn return ret; //否则返还指向vector的shared_ptrrnrnrnstd::string& StrBlobPtr::deref()constrnrn auto p = check(curr, "dereference past end");rn return (*p)[curr]; //返回vector的curr坐标的字符串rnrnrnStrBlobPtr& StrBlobPtr::incr()rnrn //如果curr已经指向容器的尾后位置,就不能递增它rn check(curr, "increment past end of StrBlobPtr");rn ++curr; //推进当前位置rn return *this;rnrnrnStrBlobPtr StrBlob::begin() return StrBlobPtr(*this); rnStrBlobPtr StrBlob::end()rnrn auto ret = StrBlobPtr(*this, data->size());rn return ret;rnrnrn#endifrn[/code]rnrnrnrnrn[code=c]rnint main()rnrn std::ifstream in("str.txt");rn if (!in) rn std::cout << "open error!" << std::endl;rn return -1;rn rnrn StrBlob blob;rn for (std::string str; std::getline(in, str);) blob.push_back(str);rnrn return 0;rnrn[/code]rnrn在main函数里一调用blob类的push_back就会异常并中断,新手想了好久还是不知道问题在哪里,求大神解答....rn
函数调用指针参数的时候,提示读取访问权限冲突:0xdddddddd
是关于二叉树的,在头文件里销毁二叉树的函数。main函数只是建立二叉树是没问题的。rn在cpp文件里自己写了个函数查找二叉树中度为1 的结点个数rnint Du1(BinTree tree) rn rn queue *> nqueue;rn BinNode *pointer = tree.root;rn int m=0;rn if (pointer) nqueue.push(pointer);rn while (!nqueue.empty()) rn pointer = nqueue.front();rn if ((pointer->left && !pointer->right) || (!pointer->left && pointer->right)) m++;rn nqueue.pop();rn if (pointer->left) nqueue.push(pointer->left);rn if (pointer->right) nqueue.push(pointer->right);rn rn free(pointer); pointer = NULL; rn return m;rnrn然后再编译的时候就提示题目所说的的了。下面是头文件里的析构函数。rntemplaternBinTree::~BinTree()rnrn ReleaseBinNode(root);rnrntemplaternvoid BinTree::ReleaseBinNode(BinNode* bt)//释放结点rnrn if (bt) rn if (bt->left)rn ReleaseBinNode(bt->left);rn if (bt->right)rn ReleaseBinNode(bt->right);rn free(bt);rn bt = NULL;rn rn
CEdit派生类,引发了异常: 读取访问权限冲突
在派生类里面添加的成员变量,在外部操作的时候会报异常。rn引发了异常: 读取访问权限冲突。rnpThis-> 是 0xFFFFFFFFFFFFFEB7。rnrn贴上部分代码rnMyEditBox.hrn[code=c]rn#pragma oncern#include "afxwin.h"rnclass CMyEditBox :rn public CEditrnrnpublic:rn CMyEditBox();rn ~CMyEditBox();rnpublic:rn bool jSelectAll;rnpublic:rn bool getSelStatus();rn bool setSelStats(bool enable);rn;rn[/code]rnMyEditBox.cpprn[code=c]rn#include "stdafx.h"rn#include "MyEditBox.h"rnrnrnCMyEditBox::CMyEditBox()rn : jSelectAll(true)rnrnrnrnrnCMyEditBox::~CMyEditBox()rnrnrnrnrnbool CMyEditBox::getSelStatus()rnrn return jSelectAll;rnrnrnrnbool CMyEditBox::setSelStats(bool enable)rnrn jSelectAll = enable;rn return false;rnrn[/code]rn对应dlg文件的头文件rn[code=c]rn#pragma oncern#include "MyEditBox.h"rnrn// CTVTool_PanelBox 对话框rnrnclass CTVTool_PanelBox : public CDialogExrnrn DECLARE_DYNAMIC(CTVTool_PanelBox)rnrnpublic:rn CTVTool_PanelBox(CWnd* pParent = NULL); // 标准构造函数rn virtual ~CTVTool_PanelBox();rnrn// 对话框数据rn#ifdef AFX_DESIGN_TIMErn enum IDD = IDD_DIALOG_PANELBOX ;rn#endifrnrnprotected:rn virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持rn DECLARE_MESSAGE_MAP()rnpublic:rn //省略代码rn CMyEditBox *myEdit_M;rn afx_msg void OnEnKillfocusEditPanelM();rn;rn[/code]rn对应dlg的cpp文件rn[code=c]rn#include "stdafx.h"rn#include "TVTool_PanelBox.h"rn#include "afxdialogex.h"rn// CTVTool_PanelBox 对话框rnrnIMPLEMENT_DYNAMIC(CTVTool_PanelBox, CDialogEx)rn //省略代码rnBEGIN_MESSAGE_MAP(CTVTool_PanelBox, CDialogEx)rnON_EN_KILLFOCUS(IDC_EDIT_PANEL_M, &CTVTool_PanelBox::OnEnKillfocusEditPanelM)rnEND_MESSAGE_MAP()rn //省略代码rnBOOL CTVTool_PanelBox::OnInitDialog()rnrn CDialogEx::OnInitDialog();rn // TODO: 在此添加额外的初始化rnrn myEdit_M = (CMyEditBox*)GetDlgItem(IDC_EDIT_PANEL_M);rn return TRUE; // return TRUE unless you set the focus to a controlrn // 异常: OCX 属性页应返回 FALSErnrn //省略代码rnvoid CTVTool_PanelBox::OnEnKillfocusEditPanelM()rnrn // TODO: 在此添加控件通知处理程序代码rn myEdit_M->setSelStats(true);rnrn //省略代码rn[/code]rnrn编译成功后,在编辑框IDC_EDIT_PANEL_M丢失焦点后,就会提示报异常rn引发了异常: 读取访问权限冲突。rnpThis-> 是 0xFFFFFFFFFFFFFEB7。
引发了异常: 读取访问权限冲突。 this 是 0xE0。
这是怎么了????rn[img=https://img-bbs.csdn.net/upload/201607/23/1469241953_222810.png][/img][img=https://img-bbs.csdn.net/upload/201607/23/1469241967_545848.png][/img][img=https://img-bbs.csdn.net/upload/201607/23/1469241981_721549.png][/img][img=https://img-bbs.csdn.net/upload/201607/23/1469241994_892709.png][/img]
VS2015引发了异常:读取访问权限冲突pNode是nullptr
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VS2015中用C写的出现问题:写入访问权限冲突
![图片说明](https://img-ask.csdn.net/upload/201611/10/1478786235_460948.png)n![图片说明](https://img-ask.csdn.net/upload/201611/10/1478786292_797332.png)n如图,小白一个死乞白赖的求大神解答
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