📜  Golang 中的 math.Float32frombits()函数示例

📅  最后修改于: 2021-10-24 14:18:03             🧑  作者: Mango

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Float32frombits()函数,它返回对应于 IEEE 754 二进制表示 a 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 Float32frombits()函数。

句法:

func Float32frombits(a uint32) float32

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 Float32frombits() function
    res_1 := math.Float32frombits(2)
    res_2 := math.Float32frombits(1)
    res_3 := math.Float32frombits(0)
    res_4 := math.Float32frombits(223)
  
    // 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:  3e-45
Result 2:  1e-45
Result 3:  0
Result 4:  3.12e-43

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 Float32frombits() function
    nvalue_1 := math.Float32frombits(3)
    nvalue_2 := math.Float32frombits(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:  4e-45
Result 2:  7e-44
Sum of Result 1 and Result 2:  7.4e-44