Scala赋值运算符

下面的简单示例程序演示的赋值运算符运算。将以下Scala程序复制并粘贴在Test.scala文件中,编译并运行此程序。

object Test {
   def main(args: Array[String]) {
      var a = 10;	
      var b = 20;
      var c = 0;

      c = a + b;
      println("c = a + b  = " + c );

      c += a ;
      println("c += a  = " + c );

      c -= a ;
      println("c -= a = " + c );

      c *= a ;
      println("c *= a = " + c );

      a = 10;
      c = 15;
      c /= a ;
      println("c /= a  = " + c );

      a = 10;
      c = 15;
      c %= a ;
      println("c %= a  = " + c );

      c <<= 2 ;
      println("c <<= 2  = " + c );

      c >>= 2 ;
      println("c >>= 2  = " + c );

      c >>= 2 ;
      println("c >>= a  = " + c );

      c &= a ;
      println("c &= 2  = " + c );
     
      c ^= a ;
      println("c ^= a  = " + c );

      c |= a ;
      println("c |= a  = " + c );
   }
} 

这将产生以下结果：

C:/>scalac Test.scala
C:/>scala Test
c = a + b  = 30
c += a  = 40
c -= a  = 30
c *= a  = 300
c /= a  = 1
c %= a  = 5
c <<= 2  = 20
c >>= 2  = 5
c >>= 2  = 1
c &= a  = 0
c ^= a  = 10
c |= a  = 10

C:/>