关于feof()的bug??

这是我针对feof()错误有专门写的一个简单的测试.

1.写5条记录到文件，每条一个字串，一个整数。

2。从文件里读出，结果feof()无法识别。

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
	char *str[5] = {"first","second", "third","fourth","fifty"};
	int  index[5] = {0, 1, 2, 3, 4};	

	FILE* stream;

	//write 5 record in file, each record is a string and int.
	stream = fopen("c:\\nickfile.txt", "w+b");
	for (int i=0; i<5; i++)
	{
		fwrite((void*)str[i], sizeof(char), strlen(str[i]), stream);
		fputc('\0', stream);   //use null for end
		fwrite((void*)(&index[i]), sizeof(int), 1, stream);
	}

	FILE* file;

	fclose(stream);
	char buffer[20], ch;
	char* ptr = buffer;
	int number;
		

	file = fopen("c:\\nickfile.txt", "r+b");
	while(!feof(file))   //this is not functioning well!!
	{
		ptr = buffer;
		do
		{
			ch = fgetc(file);
			*ptr = ch;
			ptr++;
		}
		while (ch!='\0');
		cout<<"str is:"<<buffer<<endl;
		fread((void*)(&number), sizeof(int), 1, file);
		cout<<"index is:"<<number<<endl;
	}
	

	return 0;
}

3。 我问了学校里c++的老师，她的意思这仿佛是一个人人皆知的bug.她说如果用fstream的类，就不会有问题，我就又写

了一个测试。如下：

4。数据之间用换行符隔开，这应该是ofstream的默认吧。结果，ifstream.eof()函数正常。

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
	char *str[5] = {"first","second", "third","fourth","fifty"};
	int  index[5] = {0, 1, 2, 3, 4};	

	ofstream out;
	out.open("c:\\nickfile.txt");
	for (int i=0; i< 5; i++)
	{
		out<<'\n'<<str[i];
		out<<'\n'<<index[i];
	}

	out.close();

	char buffer[20];
	int number;
	ifstream in;
	in.open("c:\\nickfile.txt");
	while (!in.eof())
	{
		in>>buffer;
		cout<<"str is:"<<buffer<<endl;
		in>>number;
		cout<<"number is:"<<number<<endl;
	}	

	return 0;
}