Question

How to construct a 64-bit floating-point value from the mantissa m, exponent e, and sign flag s in Go

Answer 1

package main

import (
	"fmt"
	"math"
)

func Construct64bitFloatingPointValue(m float64, e int, s bool) float64 {
	sign := 1.0
    if s {
        sign = -1.0
    }

    return sign * m * math.Pow(10, float64(e))
}

func main() {
    // Mantissa — the core number to be scaled.
    m := 5.1   // float64
    // exponent
    e := 10    // int
    // Sign flag: false means positive.
    s := false // bool

    fmt.Printf("%.0f\n", Construct64bitFloatingPointValue(m, e, s)) 
}



/*
run:

51000000000

*/

 

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