Golang 中的 strconv 包常用函数及用法详解

package main
import (
    "fmt"
    "strconv"
)
func main() {
    str := "123"
    intValue, _ := strconv.Atoi(str)
    fmt.Printf("str to int: %d\n", intValue)
    intValue += 1
    str = strconv.Itoa(intValue)
    fmt.Printf("int to str: %s\n", str)
}

package main
import (
	"fmt"
	"strconv"
)
func main() {
	// 解析整数
	intStr := "123"
	intValue, _ := strconv.ParseInt(intStr, 10, 64)
	fmt.Printf("Parsed int value: %d\n", intValue)
	// 解析布尔值
	boolStr := "true"
	boolValue, _ := strconv.ParseBool(boolStr)
	fmt.Printf("Parsed bool value: %t\n", boolValue)
	// 解析浮点数
	floatStr := "3.14"
	floatValue, _ := strconv.ParseFloat(floatStr, 64)
	fmt.Printf("Parsed float value: %f\n", floatValue)
}

package main
import (
	"fmt"
	"strconv"
)
func main() {
	// 格式化整数
	intValue := 123
	intStr := strconv.FormatInt(int64(intValue), 10)
	fmt.Printf("Formatted int string: %s\n", intStr)
	// 格式化布尔值
	boolValue := true
	boolStr := strconv.FormatBool(boolValue)
	fmt.Printf("Formatted bool string: %s\n", boolStr)
	// 格式化浮点数
	floatValue := 3.14
	floatStr := strconv.FormatFloat(floatValue, 'f', -1, 64)
	fmt.Printf("Formatted float string: %s\n", floatStr)
}

package main
import (
    "fmt"
    "strconv"
)
func main() {
    // 追加整数到字节数组
    num1 := 123
    byteSlice := []byte("Number: ")
    byteSlice = strconv.AppendInt(byteSlice, int64(num1), 10)
    fmt.Printf("Appended int: %s\n", byteSlice)
    // 追加布尔值到字节数组
    boolVal := true
    byteSlice = []byte("Bool: ")
    byteSlice = strconv.AppendBool(byteSlice, boolVal)
    fmt.Printf("Appended bool: %s\n", byteSlice)
    // 追加浮点数到字节数组
    floatVal := 3.14
    byteSlice = []byte("Float: ")
    byteSlice = strconv.AppendFloat(byteSlice, floatVal, 'f', -1, 64)
    fmt.Printf("Appended float: %s\n", byteSlice)
}

package main
import (
	"fmt"
	"strconv"
)
func main() {
	chars := []rune{'H', 'e', 'l', '\n', '♥', 127}
	for _, char := range chars {
		fmt.Printf("Character: %c, IsPrint: %v\n", char, strconv.IsPrint(char))
		fmt.Printf("Character: %c, IsGraphic: %v\n", char, strconv.IsGraphic(char))
	}
}

package main
import (
	"fmt"
	"strconv"
)
func main() {
	str := `路多辛的, "所思所想"!`
	quoted := strconv.Quote(str)
	fmt.Println("Quoted: ", quoted)
	unquoted, err := strconv.Unquote(quoted)
	if err != nil {
		fmt.Println("Unquote error: ", err)
	} else {
		fmt.Println("Unquoted: ", unquoted)
	}
}

package main
import (
	"fmt"
	"strconv"
)
func main() {
	str1 := "Hello, world!"
	str2 := "`Hello, world!`"
	str3 := "`Hello,\nworld!`"
	fmt.Println(strconv.CanBackquote(str1)) // 输出：false
	fmt.Println(strconv.CanBackquote(str2)) // 输出：true
	fmt.Println(strconv.CanBackquote(str3)) // 输出：false
}