|NO.Z.00010|——————————|BigDataEnd|——|Hadoop&Scala.V10|——|Scala.v10|Scala编程|输入输出|

一、输入和输出

### --- 输入输出说明

~~~     通过readLine 从控制台读取一行输入。
~~~     如果要读取数字、Boolean或者字符，
~~~     可以用readInt、readDouble、readByte、readShort、readLong、readFloat、readBoolean或者readChar。

### --- 输入输出编程语法

~~~     # printf 带有C语言风格的格式化字符串的 printf 函数
printf("Hello, %s! You are %d years old.", "Scala", 18)

### --- 编程代码

package yanqi.cn.part01

object ReadLineAndPrintDemo {
  def main(args: Array[String]): Unit = {
    print("请输入您的姓名：")
    val name=scala.io.StdIn.readLine()
    print("请输入您的年龄：")
    val age=scala.io.StdIn.readInt()

    println("您的姓名是："+name+"，年龄："+age)
    //printf是一个带有C语言风格的格式化字符串函数
    printf("您的姓名是：%s，年龄：%d",name,age)
    println()
    println(s"您的姓名：$name,年龄：$age")
  }
}

### --- 编译打印

D:\JAVA\jdk1.8.0_231\bin\java.exe "-javaagent:D:\IntelliJIDEA\IntelliJ IDEA 2019.3.3\lib\idea_rt.jar=52015:D:\IntelliJIDEA\IntelliJ IDEA 2019.3.3\bin" -Dfile.encoding=UTF-8 -classpath D:\JAVA\jdk1.8.0_231\jre\lib\charsets.jar;D:\JAVA\jdk1.8.0_231\jre\lib\deploy.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\access-bridge-64.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\cldrdata.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\dnsns.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\jaccess.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\jfxrt.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\localedata.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\nashorn.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\sunec.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\sunjce_provider.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\sunmscapi.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\sunpkcs11.jar;D:\JAVA\jdk1.8.0_231\jre\lib\ext\zipfs.jar;D:\JAVA\jdk1.8.0_231\jre\lib\javaws.jar;D:\JAVA\jdk1.8.0_231\jre\lib\jce.jar;D:\JAVA\jdk1.8.0_231\jre\lib\jfr.jar;D:\JAVA\jdk1.8.0_231\jre\lib\jfxswt.jar;D:\JAVA\jdk1.8.0_231\jre\lib\jsse.jar;D:\JAVA\jdk1.8.0_231\jre\lib\management-agent.jar;D:\JAVA\jdk1.8.0_231\jre\lib\plugin.jar;D:\JAVA\jdk1.8.0_231\jre\lib\resources.jar;D:\JAVA\jdk1.8.0_231\jre\lib\rt.jar;E:\NO.Z.10000——javaproject\NO.Z.00002.Hadoop\ScalaPro\out\production\ScalaPro;D:\JAVA\scala-2.12.2\lib\scala-library.jar;D:\JAVA\scala-2.12.2\lib\scala-reflect.jar yanqi.cn.part01.ReadLineAndPrintDemo
请输入您的姓名：yanqi
请输入您的年龄：28
您的姓名是：yanqi，年龄：28
您的姓名是：yanqi，年龄：28
您的姓名：yanqi,年龄：28

Process finished with exit code 0

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Walter Savage Landor:strove with none,for none was worth my strife.Nature I loved and, next to Nature, Art:I warm'd both hands before the fire of life.It sinks, and I am ready to depart

                                                                                                                                                   ——W.S.Landor

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