示例：
輸入：1234
輸出：1,234
輸入：211111234
輸出：211,111,234
package main
import (
"bufio"
"fmt"
"os"
"strconv"
"strings"
)
func main() {
inputReader := bufio.NewReader(os.Stdin)
fmt.Printf("Please input:")
input, err := inputReader.ReadString('\n')
if err != nil {
fmt.Println("There were errors reading, exiting program.")
return
}
fmt.Println("Your input is:", input)
input1, err := strconv.Atoi(strings.Replace(input, "\r\n", "", -1))
if err != nil {
fmt.Println("strconv.Atoi error, exiting program.")
return
}
var result string
for input1 > 0 {
if input1 / 1000 == 0 {
result = strconv.Itoa(input1 % 1000) + result
} else {
result = "," + strconv.Itoa(input1 % 1000) + result
}
input1 /= 1000
}
fmt.Println("convert result:", result)
}
