1 object Demo2_SdtIn {
 2   def main(args: Array[String]): Unit = {
 3     //输入信息
 4     println("请输入你的名字:")
 5     val name:String =  StdIn.readLine()
 6     println("输入年龄：")
 7     val age: Int = StdIn.readInt()
 8 
 9     //控制台打印输出
10     println(s"年龄${age}的${name}")
11   }
12 
13 }

 1 object Demo3_FileIO {
 2   def main(args: Array[String]): Unit = {
 3     //1、从文件中读取数据,然后用foreach打印出来
 4     Source.fromFile("D:\\IDEA\\Test\\sc\\src\\demo3").foreach(print)
 5 
 6     //2、将数据写入文件
 7     val writer = new PrintWriter(new File("D:\\IDEA\\Test\\sc\\src\\demo3_output."))
 8    //writer调用write方法
 9     writer.write("hello scala!")
10     writer.close()
11   }
12 
13 }