How to read and write float numbers from and into binary files? [duplicate]

Question

How should a program read and write float numbers from and into binary files in C or Vala language?

The common APIs to do writing and reading are generally designed to write in byte format. I mean you have to write arrays of one-byte data into file and read in the same format.

I'm looking for a way to write and read in float format. without typecasting and without having to change the number into string. Is it possible?

Answer 1

fwrite() and fread() or write() and read() will work just fine.

float da, db ;
    ...
fwrite( &da, 1, sizeof(da), fpout ) ;
    ...
fread( &db, 1, sizeof(db), fpin ) ;