双到const char * [英] Double to Const Char*
问题描述
如何将double转换为const char,然后将其转换回double?
How can I convert a double into a const char, and then convert it back into a double?
我想将double转换为字符串,通过fputs将其写入文件,然后当我读取该文件时,需要转换回到双重。
I'm wanting to convert the double to a string, to write it to a file via fputs, and then when I read the file, it will need to be converted back into a double.
我使用Visual C ++ 2010 Express Edition。
I'm using Visual C++ 2010 Express Edition.
推荐答案
如果你只是想将 double
值写入文件,你可以直接写入,而不将它们转换为 const char *
。将它们转换为 const char *
是过度使用。
If you just want to write the double
values to file, you can simply write it, without converting them into const char*
. Converting them into const char*
is overkill.
只需使用 std :: ofstream
as:
Just use std::ofstream
as:
std::ofstream file("output.txt")'
double d = 1.989089;
file << d ; // d goes to the file!
file.close(); //done!
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