删除字符串时堆损坏 [英] Heap corruption when deleting a string

问题描述

这是我的代码：

std::string readString()
{
     int strLen = Read<int>();
     char* rawString = new char[strLen];
     Read(rawString, strLen);
     rawString[strLen] = '\0';
     std::string retVal(rawString);
     delete [] rawString;
     return retVal;
 }

第一行读取字符串的长度。

第二行创建一个新的字符数组（c-字符串），字符串长度为

第三行读取字符串（从文件读取它）

第四行添加一个NULL到结束。

第5行从c字符串中创建一个std :: string。

第6行删除c字符串（HEAP CORRUPTION HAPPENS HERE）

第7行返回字符串，但由于错误，它不会到达这一点。

The first line reads the length of the string.
The second line creates a new char array (c-string) with the string length
The third line reads the string (its reading it from a file)
The 4th line adds a NULL to the end.
The 5th line creates an std::string out of the c-string.
The 6th line deletes the c-string (HEAP CORRUPTION HAPPENS HERE)
The 7th line returns the string, but it never reaches this point because of an error.

在第6行，我得到一个堆损坏错误：
CRT检测到应用程序在堆缓冲区结束后写入内存。

On the 6th line I get a heap corruption error: CRT detected that the application wrote to memory after end of heap buffer.

我的问题可能很明显，但为什么我得到一个堆损坏？当我创建一个std :: string，它应该复制该字符串，我应该安全删除c字符串。

My question may be obvious, but why am I getting a heap corruption? When I create an std::string, it should copy the string, and I should be safe to delete the c-string.

目前，我怀疑std :: string在我删除它后试图访问c字符串。

Currently, I'm suspecting that std::string is trying to access the c-string after I delete it.

有什么想法吗？

推荐答案

更改：

char* rawString = new char[strLen];

到：

char* rawString = new char[strLen + 1];

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