双倍到常量字符*
如何将 double 转换为 const char，然后再将其转换回 double?
How can I convert a double into a const char, and then convert it back into a double?
我想将双精度转换为字符串，通过 fputs 将其写入文件，然后当我读取文件时，需要将其转换回双精度.
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.
我使用的是 Visual C++ 2010 Express Edition.
I'm using Visual C++ 2010 Express Edition.
推荐答案
如果你只是想把 double 值写入文件，你可以直接写，不用将它们转换为 const char*.将它们转换成 const char* 是多余的.
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 作为:
Just use std::ofstream as:
std::ofstream file("output.txt")'
double d = 1.989089;
file << d ; // d goes to the file!
file.close(); //done!
相关文章