无法删除动态分配的char数组 [英] Trouble deleting dynamically allocated char array

问题描述

我收到错误消息:
检测到堆损坏:在0x003B98D0的正常块(#247)之后.
CRT检测到应用程序在堆缓冲区结束后写入了内存.

这是导致问题的函数:

I''m getting the error:
HEAP CORRUPTION DETECTED: After Normal block (#247) at 0x003B98D0.
CRT detected that the application wrote to memory after end of heap buffer.

Here''s the function that''s causing the problem:

String ^data::getItemNumber_noRev()
{
    int count = 0;
    while(itemNumber[count] != '_')
        count++;

    char *itemNum_noRev = new char[count];
    for(int i = 0; i < count; i++)
        itemNum_noRev[i] = itemNumber[i];

    itemNum_noRev[count] = '\0';

    gcroot<String ^> itemNum_noRev_system = gcnew String(itemNum_noRev);

    delete [] itemNum_noRev;

    return itemNum_noRev_system;
}

基本上，它通过char数组(例如12324736-1_6)进行处理，其中下划线之前的所有内容都是项目编号，其后是其修订版本.它以System :: String ^的形式返回，因为我正在Windows窗体中使用它.我遇到的问题是:

Basically it goes through a char array such as 12324736-1_6, where everything up to the underscore is the item number, and after is its revision. It is returned as a System::String^ because I''m using it in a Windows Form. The problem I''m having is with the line:

itemNum_noRev[count] = ''\0'';

当我不包括这一行时，我没有收到错误，但是在字符串的末尾我得到了大约10个魔术字符.当我包含该行时，就是当我得到堆损坏错误时.

有什么想法可以解决此问题吗?预先感谢您的任何建议！

Pat

When I don''t include this line, I don''t get an error, but I get about 10 magic characters at the end of my String. When I do include the line, that''s when I get the heap corruption error.

Any ideas what to do to fix this? Thanks in advance for any advice!

Pat

推荐答案

count是最后一个索引之后的1，因为它的索引为0.因此，将大小计数为+1，您将有空间容纳空终止符.

count is one past the last index, because it''s 0 indexed. So make the size count+1, and you''ll have room for your null terminator.

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