reading float32 from a file

[Jerry]

I got a file containing a 4 bytes float, which is previously generated by C program via fwrite(), and I know the byte-order is Big Endian.

now i want to read the float into memory as type float32, how can I do this?

My current solution is as follows:

package main
import (
"os"
"encoding/binary"
"math"
"fmt"
)

func main() {
fd, err := os.Open("file_containing_a_4bytes_float")
if err != nil {
return
}
b := make([]byte, 4)
fd.Read(b)
f := math.Float32frombits(binary.BigEndian.Uint32(b)) // I believe this is not idiomatic
fmt.Println(f)
}


I believe this is not the idiomatic way to read a float32 from a file, any hint on how to do this?

Regards,
Jiayu

[minux]

defer fd.Close()

var f float32

err = binary.Read(fd, binary.BigEndian, &f)

        fmt.Println(err, f)

}

 

[bryanturley]

func main() {

        fd, err := os.Open("file_containing_a_4bytes_float")

        if err != nil {

                return

        }

defer fd.Close()

var f float32

err = binary.Read(fd, binary.BigEndian, &f)

        fmt.Println(err, f)

}

just make sure the float in the file is a proper float before you do that.
it is much more rare today but in the past trading floats between machines has been iffy.