循环在输出值时会切断数组的最后两组



我有 tab[110] 数组,带有随机 1 和 0 整数,所以:1001111001011110... 依此类推,直到数组结束。我正在尝试根据汉明码输出 7 行不同的位。我的循环有效,但仅适用于从位开始的组,数组中的索引为 2,4,8,16。对于第 32 个循环,会削减其中的一半(因此从 64 开始输出,而不是从 32 开始输出),并且完全跳过第 64 组。

int x=0;
        int sum=0;
        int pointer=0;
        boolean w = true;
        System.out.println("Grupy Bitow Parzystych");
        for  (int i=2; i<=7; i++)
        {
            System.out.println("n"); 
            switch(i)
             {
                //case 1: pointer=1; 
                 case 2: pointer=2;
                     break;
                 case 3: pointer=4;
                     break;
                 case 4: pointer=8;
                     break;
                 case 5: pointer=16;
                     break;
                 case 6: pointer=32;
                     break;
                 case 7: pointer=64;
                     break;
                 default: System.out.println("DEFAULT SWiTCH");
                     break;
             }
            sum=0;
            x=0;
            for (int p=0; p<tab.length; p++)
             {
                if (p==0) System.out.println("Grupa bitow: "+pointer);
                if (p<=pointer-1) continue;
                x++;
                if (x == pointer)
                    {
                        x = 0;
                        w = !w;
                    }         
                if (p%20==0) System.out.println("");        
                if (w) 
                    {
                        iterator = p+1;
                        System.out.print(tab[p]+"("+iterator+")"+",");
                        sum++;
                    }
                if (p==tab.length-1) System.out.println("Suma bitow pary "+pointer+": "+sum);
            }
        }

好的,现在我明白你在做什么了......几个人。首先,将数组扩展到最少 128 个值,以使 64 位大小写正常工作。110 太小了。这是您要使用的主要算法。我冒昧地将变量名pointer更改为parity,并删除了一些额外的变量,如iterator。这应该接近您的需求。检查"一次性"错误等。

        switch(i)
        {
        //case 1: pointer=1; 
        case 2: parity=2;
        break;
        case 3: parity=4;
        break;
        case 4: parity=8;
        break;
        case 5: parity=16;
        break;
        case 6: parity=32;
        break;
        case 7: parity=64;
        break;
        default: System.out.println("DEFAULT SWiTCH");
        break;
        }
        System.out.println("Grupa bitow: "+parity);
        sum=0;
        int index = parity - 1;
        int blockSize = parity;
        int printCount = 0;
        while (index + blockSize < tab.length) //don't run past end of bit array
        {
            for (int j = 0; j < blockSize; j++) 
            {
                if (printCount++ % 20 == 0)
                    System.out.println("");
                System.out.print(tab[index] + "(" + (index + 1) + ")" + ",");
                sum += tab[index++];
            }
            //printing of consecutive bits complete. Now skip the next 2|4|8|16|32|64 bits
            index += blockSize;
        }
        System.out.println("nnSuma bitow pary " + parity  + ": " + sum);
    }

输出:

Grupy Bitow Parzystych

比托集团: 2

0(2),0(3),1(6),0(7),1(10),0(11),0(14),0(15),1(18),0(19),0(22),0(23),1(26),1(27),0(30),1(31),0(

34),0(35),1(38),1(39),0(42),0(43),0(46),0(47),0(50),0(51),0(54),0(55),0(58),0(59),0(62),1(63),1(66),0(67),0(70),1(71),0(74),1(75),0(78),1(79),1(82),0(83),0(86),0(87),1(90),1(91),0(94),1(95),0(98),1(99),1(102),1(103),1(106),0(107),0(110),0(111),0(114),0(115),0(118),0(119),0(122),0(123),0(126),0(127),

苏玛比托帕里2:21

比托集团: 4

0(4),0(5),1(6),0(7),0(12),1(13),0(14),0(15),1(20),1(21),0(22),0(23),1(28),1(29),0(30),1(31),1(

36),0(37),1(38),1(39),0(44),1(45),0(46),0(47),0(52),1(53),0(54),0(55),1(60),0(61),0(62),1(63),1(68),0(69),0(70),1(71),1(76),0(77),0(78),1(79),1(84),0(85),0(86),0(87),0(92),1(93),0(94),1(95),1(100),1(101),1(102),1(103),0(108),0(109),0(110),0(111),0(116),0(117),0(118),0(119),0(124),0(125),0(126),0(127),

苏玛比托帕里4:25

比托集团: 8

0(8),0(9),1(10),0(11),0(12),1(13),0(14),0(15),1(24),0(25),1(26),1(27),1(28),1(29),0(30),1(

31),1(40),0(41),0(42),0(43),0(44),1(45),0(46),0(47),1(56),0(57),0(58),0(59),1(60),0(61),0(62),1(63),1(72),0(73),0(74),1(75),1(76),0(77),0(78),1(79),0(88),0(89),1(90),1(91),0(92),1(93),0(94),1(95),0(104),0(105),1(106),0(107),0(108),0(109),0(110),0(111),0(120),0(121),0(122),0(123),0(124),0(125),0(126),0(127),

苏玛比托帕里8:22

比托集团: 16

1(16),0(17),1(18),0(19),1(20),1(21),0(22),0(23),1(24),0(25),1(26),1(27),1(28),1(29),0(30),1(31),0(48),0(

49),0(50),0(51),0(52),1(53),0(54),0(55),1(56),0(57),0(58),0(59),1(60),0(61),0(62),1(63),1(80),1(81),1(82),0(83),1(84),0(85),0(86),0(87),0(88),0(89),1(90),1(91),0(92),1(93),0(94),1(95),0(112),0(113),0(114),0(115),0(116),0(117),0(118),0(119),0(120),0(121),0(122),0(123),0(124),0(125),0(126),0(127),

苏玛比托帕里16:22

比托集团: 32

0(32),1(33),0(34),0(35),1(36),0(37),1(38),1(39),1(40),0(41),0(42),0(43),0(44),1(45),0(46),0(47),0(48),0(49),0(

50),0(51),0(52),1(53),0(54),0(55),1(56),0(57),0(58),0(59),1(60),0(61),0(62),1(63),1(96),0(97),0(98),1(99),1(100),1(101),1(102),1(103),0(104),0(105),1(106),0(107),0(108),0(109),0(110),0(111),0(112),0(113),0(114),0(115),0(116),0(117),0(118),0(119),0(120),0(121),0(122),0(123),0(124),0(125),0(126),0(127),

苏玛比托帕里32:17

比托集团:64

0(64),1(65),1(66),0(67),1(68),0(69),0(70),1(71),1(72),0(73),0(74),1(75),1(76),0(77),0(78),1(79),1(80),1(

81),1(82),0(83),1(84),0(85),0(86),0(87),0(88),0(89),1(90),1(91),0(92),1(93),0(94),1(95),1(96),0(97),0(98),1(99),1(100),1(101),1(102),1(103),0(104),0(105),1(106),0(107),0(108),0(109),0(110),0(111),0(112),0(113),0(114),0(115),0(116),0(117),0(118),0(119),0(120),0(121),0(122),0(123),0(124),0(125),0(126),0(127),

苏玛比托帕里64:23

尝试这样的事情:

System.out.println( "Grupy Bitow Parzystych" );
int pointer = 0, sum = 0;
for ( int i = 0; i < 7; i++ ) {
  pointer = 1 << i; // 1
  sum = 0;
  for ( int p = 0; p < tab.length; p++ ) {
    if ( p == 0 ) {
      System.out.println( "nnGrupa bitow: " + pointer );
    }
    if ( ( ( p+1 ) & pointer ) == 0 || p == pointer ) { // 2
      continue;
    }
    System.out.format( "%d(%d), ", tab[p], p + 1 ); // 3
    sum += tab[p]; // 4
    if ( p == tab.length - 1 ) {
      System.out.format( "nSuma bitow pary %d: %dn" , pointer , sum );
    }
  }
}

编号注释:

  1. pointer的值是 2 的指数,因此可以使用简单的"向左滚动"运算符。(也可以使用"乘以 2"...
  2. pointer 掩蔽索引,用二进制算术 AND 运算符。
  3. p是从零开始的,您的打印索引似乎是从零开始的,因此+1.
  4. tab[p]的值要么是1要么是0,所以把它相加会得到1值的数量......

编辑:

现在我看到你想检查汉明码了。我编辑了上面的代码。

  1. 第二个条件是跳过奇偶校验(pointer)位...

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