使用fread读入int缓冲区 [英] using fread to read into int buffer

问题描述

我想知道是否可以使用fread将数据读入整数缓冲区。
我看到fread（）以void *作为第一个参数。所以我不能只是传递一个整数
缓冲区（typecast到void *），然后使用这个来读取我想从文件中多少字节，只要缓冲区足够大？

I would like to know if I can use fread to read data into an integer buffer. I see fread() takes void * as the first parameter. So can't I just pass an integer buffer (typecast to void *) and then use this to read howmuchevery bytes I want to from the file, as long as the buffer is big enough ?

ie。不能执行：

  int buffer[10];
  fread((void *)buffer, sizeof(int), 10, somefile);
  // print contents of buffer
  for(int i = 0; i < 10; i++)
  cout << buffer[i] << endl;

这里有什么问题？

推荐答案

如果你使用类似 fwrite （binarywrite）。如果文件是人类可读的（你可以用文本编辑器打开它，看看有意义的数字），你可能想要 fscanf / code>。

This should work if you wrote the ints to the file using something like fwrite ("binary" write). If the file is human-readable (you can open it with a text editor and see numbers that make sense) you probably want fscanf / cin.

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