Golang math.Float32frombits()的作用及示例

Go语言提供了math包内置的基本常量和数学函数来对数字进行操作。该包提供了 Float32frombits()函数 ，它返回与a的IEEE 754二进制表示相对应的浮点数，其中a的符号位和结果在相同的位位置。因此，您需要使用import关键字在程序中添加一个math包来访问Float32frombits()函数。

语法:

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