bitSize指定结果必须能无溢出赋值的整数类型,0、8、16、32、64 分别代表 int、int8、int16、int32、int64; 返回的err是*NumErr类型的,如果语法有误,err.Error = ErrSyntax;如果结果超出类型范围err.Error = ErrRange。 ParseUnit() funcParseUint(sstring, baseint, bitSizeint)(nuint64, errerror) AI代码...
byte(ip>>24),byte(ip>>16),byte(ip>>8),byte(ip))}funcInetAtoN(ipstring)int64{ret:=big.NewInt(0)ret.SetBytes(net.ParseIP(ip).To4())returnret.Int64()}funcmain(){ip:="192.168.78.123"ipInt:=InetAtoN(ip)fmt.Printf("convert string ip [%s] to int: %d\n",ip...
普通变量类型int,float,string 都可以使用 type (a)这种形式来进行强制类型转换,比如 var a int32 = 10 var b int64 = int64(a) var c float32 = 12.3 var d float64 =float64(c) 1. 2. 3. 4. golang中 指针也是有类型的, package main func main() { var a int = 10 var p *int =&a ...
(sstring,callback Callback)int64{ifvalue,err:=strconv.ParseInt(s,0,0);err!=nil{callback(err.Error())return0}else{returnvalue}}// 记录日志消息的具体实现funcerrLog(msgstring){fmt.Println("Convert error: ",msg)}funcmain(){fmt.Println(stringToInt("18",errLog))fmt.Println(stringToInt("...
varc *int64 c= (*int64)(p) } 这样的代码是错误的,编译器会提示cannot convert p (type *int) to type *int64 指针的强制类型转换需要用到unsafe包中的函数实现 1 2 typeArbitraryType int typePointer *ArbitraryType 从unsate.Pointer的定义如下,从定义中我们可以看出,Pointer的本质是一个int的指针: ...
func InetAtoN(ip string) int64 { ret := big.NewInt(0) ret.SetBytes(net.ParseIP(ip).To4()) return ret.Int64() } func main() { ip := "192.168.78.123" ipInt := InetAtoN(ip) fmt.Printf("convert string ip [%s] to int: %d\n", ip, ipInt) ...
FormatInt 对大整数或无符号整数进行转换 bigIntValue := int64(9223372036854775807) // MaxInt64 ...
Converting between types is done via a function with the name of the type to convert to. Golang没有类型的自动转换,需要手动转换类型。也就是说不能拿float乘int varxint=42// x has type intf :=float64(x)// f has type float64 (ie. 42.0)varyfloat64=11.9// y has type float64i :=int...
// Convert net.IP to int64 ,http://www. func inet_aton(ipnr net.IP) int64 { bits := strings.Split(ipnr.String(),".") b0, _ := strconv.Atoi(bits[0]) b1, _ := strconv.Atoi(bits[1]) b2, _ := strconv.Atoi(bits[2])...
// convert the id in string to int id, err := strconv.Atoi(params["id"]) if err != nil { log.Fatalf("Unable to convert the string into int. %v", err) } // call the deleteUser, convert the int to int64 deletedRows := deleteUser(int64(id)) ...