Golang如何实现任意进制转换的方法示例
作者:LiXUEPING 时间:2024-02-23 07:43:48
前言
最近因为工作的需要,需要写个短链服务,用到了10->62进制,网上找了一个,可以转换最多76位进制的博客,现在分享出来,下面话不多说了,来一起看看详细的介绍吧。
压缩数据用,无损压缩
示例代码:
package main
import (
"fmt"
"math"
"strconv"
"strings"
)
var tenToAny map[int]string = map[int]string{0: "0", 1: "1", 2: "2", 3: "3", 4: "4", 5: "5", 6: "6", 7: "7", 8: "8", 9: "9", 10: "a", 11: "b", 12: "c", 13: "d", 14: "e", 15: "f", 16: "g", 17: "h", 18: "i", 19: "j", 20: "k", 21: "l", 22: "m", 23: "n", 24: "o", 25: "p", 26: "q", 27: "r", 28: "s", 29: "t", 30: "u", 31: "v", 32: "w", 33: "x", 34: "y", 35: "z", 36: ":", 37: ";", 38: "<", 39: "=", 40: ">", 41: "?", 42: "@", 43: "[", 44: "]", 45: "^", 46: "_", 47: "{", 48: "|", 49: "}", 50: "A", 51: "B", 52: "C", 53: "D", 54: "E", 55: "F", 56: "G", 57: "H", 58: "I", 59: "J", 60: "K", 61: "L", 62: "M", 63: "N", 64: "O", 65: "P", 66: "Q", 67: "R", 68: "S", 69: "T", 70: "U", 71: "V", 72: "W", 73: "X", 74: "Y", 75: "Z"}
func main() {
fmt.Println(decimalToAny(9999, 76))
fmt.Println(anyToDecimal("1F[", 76))
}
// 10进制转任意进制
func decimalToAny(num, n int) string {
new_num_str := ""
var remainder int
var remainder_string string
for num != 0 {
remainder = num % n
if 76 > remainder && remainder > 9 {
remainder_string = tenToAny[remainder]
} else {
remainder_string = strconv.Itoa(remainder)
}
new_num_str = remainder_string + new_num_str
num = num / n
}
return new_num_str
}
// map根据value找key
func findkey(in string) int {
result := -1
for k, v := range tenToAny {
if in == v {
result = k
}
}
return result
}
// 任意进制转10进制
func anyToDecimal(num string, n int) int {
var new_num float64
new_num = 0.0
nNum := len(strings.Split(num, "")) - 1
for _, value := range strings.Split(num, "") {
tmp := float64(findkey(value))
if tmp != -1 {
new_num = new_num + tmp*math.Pow(float64(n), float64(nNum))
nNum = nNum - 1
} else {
break
}
}
return int(new_num)
}
来源:http://www.lflxp.cn/2016/04/09/2016-04-09-任意进制转换/
标签:golang,进制转换
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