无法使用fwrite将int写入文件 [英] Can't write int to file using fwrite
问题描述
我正在尝试格式化键盘记录输出,以便显示时间:
I'm trying to format my keylog output so it shows time:
t = time(0);
now = localtime(&t);
if(now->tm_min != prevM && now->tm_hour != prevH)
{
prevM = now->tm_min;
prevH = now->tm_hour;
fwrite("[", 1, sizeof(WCHAR), keylog);
fwrite(&prevH, 1, sizeof(int), keylog);
fwrite("]", 1, sizeof(WCHAR), keylog);
fwrite(" ", 1, sizeof(WCHAR), keylog);
fflush(keylog);
}
但是我没有在文件中写入"[DLE NUL]",而DLENUL是问号.
but instead of readable number I get "[ DLE NUL ] " written in my file, where DLENUL is question mark.
我如何写一个可读的数字?
How do I make it to write a readable number?
推荐答案
将 fprintf
用作其他建议.
原因: fwrite
通常用于写入二进制文件以写入相同类型的数据块.
Reason:
fwrite
is generally used to write in binary files to write blocks of same type of data.
您要写入的数据看起来像一个字符串,可以使用具有以下语法的 fprintf
将完整的数据写入文件中.
The data you are writing looks like a character string, you can use fprintf
with following syntax to write your complete data in the file.
fprintf(keylog, "[%d] ", prevH);
似乎您正在写宽字符(使用 wchar
时).您可以相应地使用不同的格式说明符.
It seems you are writing wide characters (as you use wchar
). You can use different format specifiers accordingly.
这篇关于无法使用fwrite将int写入文件的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!