dongmai6666 2015-10-14 16:37
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在golang中将字符串转换为数字

Golang has strconv library that converts string to int64 and uint64.

However, the rest of integer data types seems to be unsupported as I can't find conversion functions for byte, int16, uint16, int32, uint32 data types.

One can always convert from byte, 16-bit and 32-bit data types to int64 and uint64 without loss of precision. Is that what's intended by language?

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  • duanju7199 2015-10-14 16:41
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    If you look at the docs a bit more closely you can use this method;

    func ParseInt(s string, base int, bitSize int)
    

    https://golang.org/pkg/strconv/#ParseInt

    The bitSize argument says how large the int is so you can do 8 or 16 or 32 for those smaller integer types. Atoi calls this internally. I believe you're wanting 10 for the base argument. So like b, err := strconv.ParseInt("5", 10, 8) for a byte.

    EDIT: Just going to add a couple things to the answer here in case the OP is in fact confused how to convert a 16-bit int into a string... If that is your intended goal just use fmt.Sprintf or you can do a conversion from smaller int to larger int as it will always succeed. Examples of both here; https://play.golang.org/p/UWSVxEmQ1N

    package main
    
    import "fmt"
    import "strconv"
    
    func main() {
        var a int16
        a = 5
        s := fmt.Sprintf("%d", a)
        s2 := strconv.Itoa(int(a))
        fmt.Println(s)
        fmt.Println(s2)
    }
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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