doudiaozhi6658
2018-07-14 20:30
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如何在golang中的txt文件中编写循环的输出

i'm new in go, i want to know, how to write the output of loop for in txt file in golang here my code

package main

import (
    "fmt"
    "log"
    "os"
)

func main() {

    for i := 1; i <= 10; i++ {
        if i%2 == 0 {
            continue
        }
        fmt.Printf("%d ", i)
        file, err := os.Create("result.txt")
        if err != nil {
            log.Fatal("Cannot create file", err)
        }
        defer file.Close()

        fmt.Fprintf(file, " x equal to %d", i)

    }

}

but i get 9 instead of 1 3 5 7 9 so how to fix that

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1条回答 默认 最新

  • dongyu4863 2018-07-14 20:46
    最佳回答

    The problem is that you are recreating the file each iteration of the loop, which is why the only value in the file is the last value you write in the loop.

    Try the following

    package main
    
    import (
        "fmt"
        "log"
        "os"
    )
    
    func main() {
        file, err := os.Create("result.txt")
        if err != nil {
            log.Fatal("Cannot create file", err)
        }
        defer file.Close()
    
        for i := 1; i <= 10; i++ {
            if i%2 == 0 {
                continue
            }
            fmt.Printf("%d ", i)
            fmt.Fprintf(file, " x equal to %d", i)
        }
    }
    
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