當(dāng)我的數(shù)據(jù)文件如下所示時(shí)，如何從 Google Go 中的文件讀取數(shù)據(jù)：SomeString 200.0 2OtherString 100.6 9OneMoreString 550.8 1（字符串、雙精度和整數(shù)）。我試過(guò)了bufio.readLine，bufio.readString但這些正在閱讀整行，而我需要單獨(dú)的變量。
2 回答
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TA貢獻(xiàn)1805條經(jīng)驗(yàn) 獲得超9個(gè)贊
例如，
package main
import (
"bufio"
"fmt"
"os"
"strconv"
"strings"
)
type Data struct {
AString string
AFloat float64
AnInt int64
}
func ParseLine(line string) (*Data, error) {
data := new(Data)
var err error
text := strings.TrimRight(line, " ")
i := strings.LastIndex(text, " ")
i++
text = text[i:]
data.AnInt, err = strconv.ParseInt(text, 10, 64)
if err != nil {
return nil, err
}
line = line[:i]
text = strings.TrimRight(line, " ")
i = strings.LastIndex(text, " ")
i++
text = text[i:]
data.AFloat, err = strconv.ParseFloat(text, 64)
if err != nil {
return nil, err
}
line = line[:i]
data.AString = line
return data, nil
}
func main() {
f, err := os.Open("data.txt")
if err != nil {
fmt.Fprintln(os.Stderr, "opening input:", err)
return
}
scanner := bufio.NewScanner(f)
for scanner.Scan() {
line := scanner.Text()
data, err := ParseLine(line)
if err != nil {
fmt.Fprintln(os.Stderr, "reading input:", err, ":", line)
continue
}
fmt.Println(*data)
}
if err := scanner.Err(); err != nil {
fmt.Fprintln(os.Stderr, "reading input:", err)
}
}
輸入（data.txt）：
Some String 200.0 2
Other String 100.6 9
One More String 550.8 1
輸出：
{Some String 200 2}
{Other String 100.6 9}
{One More String 550.8 1}
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