Golang 中的 math.Float64frombits()函数示例

Go 语言为基本常量和数学函数提供内置支持，以在 math 包的帮助下对数字执行运算。这个包提供了Float64frombits()函数，它返回与 IEEE 754 二进制表示 a 对应的浮点数，a 的符号位和结果在相同的位位置。因此，您需要在 import 关键字的帮助下在程序中添加一个数学包来访问 Float64frombits()函数。

句法：

func Float64frombits(a uint64) float64

示例 1：

// Golang program to illustrate how to find
// the floating-point number corresponding
// to the IEEE 754 binary representation
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding floating-point number corresponding
    // to the IEEE 754 binary representation 
    // of the given numbers
    // Using Float64frombits() function
    res_1 := math.Float64frombits(2)
    res_2 := math.Float64frombits(1)
    res_3 := math.Float64frombits(0)
    res_4 := math.Float64frombits(23)
  
    // Displaying the result
    fmt.Println("Result 1: ", res_1)
    fmt.Println("Result 2: ", res_2)
    fmt.Println("Result 3: ", res_3)
    fmt.Println("Result 4: ", res_4)
  
}

输出：

Result 1:  1e-323
Result 2:  5e-324
Result 3:  0
Result 4:  1.14e-322

示例 2：

// Golang program to illustrate how to find
// the floating-point number corresponding
// to the IEEE 754 binary representation
package main
  
import (
    "fmt"
    "math"
)
  
// Main function
func main() {
  
    // Finding floating-point number corresponding
    // to the IEEE 754 binary representation
    // of the given numbers
    // Using Float64frombits() function
    nvalue_1 := math.Float64frombits(3)
    nvalue_2 := math.Float64frombits(50)
  
    // Sum of the given values
    res := nvalue_1 + nvalue_2
    fmt.Println("Result 1: ", nvalue_1)
    fmt.Println("Result 2: ", nvalue_2)
    fmt.Println("Sum of Result 1 and Result 2: ", res)
  
}

输出：

Result 1:  1.5e-323
Result 2:  2.47e-322
Sum of Result 1 and Result 2:  2.6e-322