从文件解析矩阵到 Go 中的二维切片

package main

import (
    "fmt"
    "os"
    "text/scanner"
)

func main() {
    file, err := os.Open("matrix.txt")
    if err != nil {
        fmt.Println("Error opening file:", err)
        return
    }
    defer file.Close()

    var scan scanner.Scanner
    scan.Init(file)
    scan.Whitespace = 1<<'\t' | 1<<'\r' | 1<<' ' // 定义空白字符
}

package main

import (
    "fmt"
    "os"
    "strconv"
    "text/scanner"
)

func main() {
    file, err := os.Open("matrix.txt")
    if err != nil {
        fmt.Println("Error opening file:", err)
        return
    }
    defer file.Close()

    var scan scanner.Scanner
    scan.Init(file)
    scan.Whitespace = 1<<'\t' | 1<<'\r' | 1<<' '

    var matrix [][]int
    var row []int

    for tok := scan.Scan(); tok != scanner.EOF; tok = scan.Scan() {
        if tok == scanner.Int {
            // 获取 token 的值
            value := scan.TokenText()
            intValue, err := strconv.Atoi(value)
            if err != nil {
                fmt.Println("Error converting to integer:", err)
                return
            }
            row = append(row, intValue)
        } else if tok == scanner.String || tok == scanner.Newline { // 假设换行符是 String 类型或者单独的 Newline 类型
            // 行结束
            matrix = append(matrix, row)
            row = []int{} // 重置 row
        }
    }

    // 处理最后一行，如果文件不是以换行符结尾
    if len(row) > 0 {
        matrix = append(matrix, row)
    }

    // 打印结果
    for _, r := range matrix {
        fmt.Println(r)
    }
}

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