字符指针指向字符串，然后指向字符串数组。"./a.out"中的错误：malloc()：内存损坏：0x0900c3b0***

我得到这个错误：*中有错误`/a.out'：malloc（）：内存损坏：0x0900c3b0*

我正在尝试将一个char指针转换为一个字符串，然后将该字符串放入一个字符串数组中以供以后使用。我不明白为什么这不起作用。我假设我放入数组中的字符串被删除了，这可能就是原因。

当我执行新字符串（firstByte）时发生错误

这是代码：

char *entries[16] = {nullptr};

string *strEntries[16] = {nullptr};
  char * firstByte = 0;
  stringstream s;
  size_t len;
  string sfB; 
  firstByte = new char[sizeof(char)];
  count = (FirstRootDirSec*512) + 32;
  lseek(fd, count, SEEK_SET); //Takes us to 32 bytes after root directory, or first entry
  //so either find a way to just read in one byte at a time, or 
  //take the first character of firstByte. firstbyte[0]. That's probably good.
  for(int i = 0; i<16; i++){
     //check first byte
     //if first byte is a 41 or 40, then it is a long directory, and then we can jump ahead 32 bytes, or 0x20

    lseek(fd, count, SEEK_SET); //Takes us to 32 bytes after
    read(fd, firstByte, count);
    count+=32;
    if(firstByte[2] != ''){
      //then not a long entry, and we can put it in entries.
//       string str(firstByte);

      //error happens when I do new string(firstByte)
      **entries[i] = firstByte;
      strEntries[i] = new string(firstByte);
      cout<<entries[i]<<"blah"<<endl;**
}
}