BitVector32
的 CreateMask()
函数是做什么的?我不明白什么是掩码。
我想了解以下代码行。CreateMask() 只是将位设置为 true 吗?
// Creates and initializes a BitVector32 with all bit flags set to FALSE.
BitVector32 myBV = new BitVector32( 0 );
// Creates masks to isolate each of the first five bit flags.
int myBit1 = BitVector32.CreateMask();
int myBit2 = BitVector32.CreateMask( myBit1 );
int myBit3 = BitVector32.CreateMask( myBit2 );
int myBit4 = BitVector32.CreateMask( myBit3 );
int myBit5 = BitVector32.CreateMask( myBit4 );
// Sets the alternating bits to TRUE.
Console.WriteLine( "Setting alternating bits to TRUE:" );
Console.WriteLine( " Initial: {0}", myBV.ToString() );
myBV[myBit1] = true;
Console.WriteLine( " myBit1 = TRUE: {0}", myBV.ToString() );
myBV[myBit3] = true;
Console.WriteLine( " myBit3 = TRUE: {0}", myBV.ToString() );
myBV[myBit5] = true;
Console.WriteLine( " myBit5 = TRUE: {0}", myBV.ToString() );
这的实际应用是什么?