幻方解法之horse法生成奇阶幻方

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/*

程序思想参考百度百科上"幻方法则" 2015-01-27

http://baike.baidu.com/link?url=7ynfkLYfGv4f7PtQkuH4PSn_8IFr_QFAN-Bnsk0hmd2uk6WITW7r1d8o7IQJ1IL3bNRHbpHYbVXpDAvNbyJBDK


其实在维基百科上有更全面的,搜索Magic square即可查到,可惜太英语了,有点难,留着以后看^*^


代码环境xcode6.1 playground


几个公用函数只在第一篇显示,后面的篇章不在重复

func isMagic(s:[[Int]])->[Int]?

func printMagic(s:[[Int]])

func signed(aint: Int)->Int

func correction(k: Int, step: Int) ->Int

*/


/*

三、horse法生成奇阶幻方

对于所有的奇阶幻方,在第一行居中的方格内放1,向右走1步,下走2步以跳马步,依次填入234…,若出到方阵下方,把该数字填到本该填数所在列上方相应的格;若出到方阵右方,把该数字填到本该填数所在行的左方相应的格;如果落步格已有数字,则向下移一格继续填写。如下图用Horse法生成的5阶幻方:

23 12 1 20 9

4 18 7 21 15

10 24 13 2 16

11 5 19 8 22

17 6 25 14 3

*/

func JJHorse1(#step:Int) -> ([[Int]])?{

   if (step <3) {returnnil}

   if (step %2 ==0) {returnnil}

    

   let aRow = [Int](count: step, repeatedValue:0)

   var solution = [[Int]](count: step, repeatedValue: aRow)

    

    //要赋值的位置

   var row =0

   var col = step/2

   var iPut =1 //放这个数

    

    solution[row][col] = iPut++

   var time = step * step -1

   do{

        //下一个赋值的位置

       var nextcol = col +1

       var nextrow = row +2

        

        nextcol =correction(nextcol,step)

        nextrow =correction(nextrow,step)

        

       if solution[nextrow][nextcol] !=0{

            nextrow = row +1

            nextrow =correction(nextrow,step)

            nextcol = col

           if solution[nextrow][col] !=0{

               return solution

            }

        }

        

        row = nextrow

        col = nextcol

        solution[row][col] = iPut++

        

    }while(time-- >0)

    

    return nil

}


//测试过程

func testJJHorse1(){

   func testAStep(step:Int){

       let s =JJHorse1(step: step)

       iflet s1 = s{

           printMagic(s1)

           let k =isMagic(s1)

           iflet k1 = k{

               println("这个不是幻方 k=\(k1)")

            }

            

        }else{

            println("s is not a magic square step =\(step)")

        }

    }

    testAStep(3)

    testAStep(5)

    testAStep(7)

    testAStep(9)

    testAStep(11)

}

//testJJHorse1()

/*

[8, 1, 6]

[3, 5, 7]

[4, 9, 2]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[23, 12, 1, 20, 9]

[4, 18, 7, 21, 15]

[10, 24, 13, 2, 16]

[11, 5, 19, 8, 22]

[17, 6, 25, 14, 3]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[46, 31, 16, 1, 42, 27, 12]

[5, 39, 24, 9, 43, 35, 20]

[13, 47, 32, 17, 2, 36, 28]

[21, 6, 40, 25, 10, 44, 29]

[22, 14, 48, 33, 18, 3, 37]

[30, 15, 7, 41, 26, 11, 45]

[38, 23, 8, 49, 34, 19, 4]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[77, 58, 39, 20, 1, 72, 53, 34, 15]

[6, 68, 49, 30, 11, 73, 63, 44, 25]

[16, 78, 59, 40, 21, 2, 64, 54, 35]

[26, 7, 69, 50, 31, 12, 74, 55, 45]

[36, 17, 79, 60, 41, 22, 3, 65, 46]

[37, 27, 8, 70, 51, 32, 13, 75, 56]

[47, 28, 18, 80, 61, 42, 23, 4, 66]

[57, 38, 19, 9, 71, 52, 33, 14, 76]

[67, 48, 29, 10, 81, 62, 43, 24, 5]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[116, 93, 70, 47, 24, 1, 110, 87, 64, 41, 18]

[7, 105, 82, 59, 36, 13, 111, 99, 76, 53, 30]

[19, 117, 94, 71, 48, 25, 2, 100, 88, 65, 42]

[31, 8, 106, 83, 60, 37, 14, 112, 89, 77, 54]

[43, 20, 118, 95, 72, 49, 26, 3, 101, 78, 66]

[55, 32, 9, 107, 84, 61, 38, 15, 113, 90, 67]

[56, 44, 21, 119, 96, 73, 50, 27, 4, 102, 79]

[68, 45, 33, 10, 108, 85, 62, 39, 16, 114, 91]

[80, 57, 34, 22, 120, 97, 74, 51, 28, 5, 103]

[92, 69, 46, 23, 11, 109, 86, 63, 40, 17, 115]

[104, 81, 58, 35, 12, 121, 98, 75, 52, 29, 6]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

*/


/*

n阶奇阶幻方,若n为不是3的倍数,那么在任意一格内放1,向右走1步,以跳马步下走2步,依次填入234…,若出到方阵下方,就把该数字填到本该填数所在列上方相应的格内;若出到方阵右方,就把该数字填到本该填数所在行的左方相应的格内;如果落步格已有数字,则向上移一格继续填写。如下图所示,用Horse法生成的5阶幻方:

1 14 22 10 18

25 8 16 4 12

19 2 15 23 6

13 21 9 17 5

7 20 3 11 24

*/

func JJHorse2(#step:Int, #row_1:Int, #col_1:Int) -> ([[Int]])?{

   if (step <3) {returnnil}

   if (step %2 ==0) {returnnil}

    

   let aRow = [Int](count: step, repeatedValue:0)

   var solution = [[Int]](count: step, repeatedValue: aRow)

    

    //要赋值的位置

   var row = row_1

   var col = col_1

   var iPut =1 //放这个数

    

    solution[row][col] = iPut++

   var time = step * step -1

   do{

        //下一个赋值的位置

       var nextcol = col +1

       var nextrow = row +2

        

        nextcol =correction(nextcol,step)

        nextrow =correction(nextrow,step)

        

       if solution[nextrow][nextcol] !=0{

            nextrow = row -1

            nextrow =correction(nextrow,step)

            nextcol = col

           if solution[nextrow][col] !=0{

               return solution

            }

        }

        

        row = nextrow

        col = nextcol

        solution[row][col] = iPut++

        

    }while(time-- >0)

    

    return nil

}


//测试过程

func testJJHorse2(){

   func testAStep(step:Int, row_1: Int, col_1:Int){

       let s =JJHorse2(step: step, row_1: row_1, col_1: col_1)

       iflet s1 = s{

           printMagic(s1)

           let k =isMagic(s1)

           iflet k1 = k{

               println("这个不是幻方 k=\(k1)")

            }


        }else{

            println("s is not a magic square step =\(step)")

        }

    }

    println("3的倍数不行")

    testAStep(3,0,0)

    testAStep(5,0,0)

    testAStep(5,0,1)

    testAStep(5,0,2)

    testAStep(5,0,3)

    testAStep(5,0,4)

    testAStep(5,1,1)

    testAStep(5,1,2)

    testAStep(5,1,3)

    testAStep(5,2,2)

    testAStep(5,3,3)

    testAStep(7,0,0)

    println("3的倍数不行")

    testAStep(9,0,0)

}

//testJJHorse2()//打开即可打印

/*

3的倍数不行

[1, 7, 4]

[9, 6, 3]

[5, 2, 8]

这个不是幻方 k=[1, 0]

[1, 14, 22, 10, 18]

[25, 8, 16, 4, 12]

[19, 2, 15, 23, 6]

[13, 21, 9, 17, 5]

[7, 20, 3, 11, 24]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[18, 1, 14, 22, 10]

[12, 25, 8, 16, 4]

[6, 19, 2, 15, 23]

[5, 13, 21, 9, 17]

[24, 7, 20, 3, 11]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[10, 18, 1, 14, 22]

[4, 12, 25, 8, 16]

[23, 6, 19, 2, 15]

[17, 5, 13, 21, 9]

[11, 24, 7, 20, 3]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[22, 10, 18, 1, 14]

[16, 4, 12, 25, 8]

[15, 23, 6, 19, 2]

[9, 17, 5, 13, 21]

[3, 11, 24, 7, 20]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[14, 22, 10, 18, 1]

[8, 16, 4, 12, 25]

[2, 15, 23, 6, 19]

[21, 9, 17, 5, 13]

[20, 3, 11, 24, 7]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[24, 7, 20, 3, 11]

[18, 1, 14, 22, 10]

[12, 25, 8, 16, 4]

[6, 19, 2, 15, 23]

[5, 13, 21, 9, 17]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[11, 24, 7, 20, 3]

[10, 18, 1, 14, 22]

[4, 12, 25, 8, 16]

[23, 6, 19, 2, 15]

[17, 5, 13, 21, 9]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[3, 11, 24, 7, 20]

[22, 10, 18, 1, 14]

[16, 4, 12, 25, 8]

[15, 23, 6, 19, 2]

[9, 17, 5, 13, 21]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[17, 5, 13, 21, 9]

[11, 24, 7, 20, 3]

[10, 18, 1, 14, 22]

[4, 12, 25, 8, 16]

[23, 6, 19, 2, 15]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[15, 23, 6, 19, 2]

[9, 17, 5, 13, 21]

[3, 11, 24, 7, 20]

[22, 10, 18, 1, 14]

[16, 4, 12, 25, 8]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

[1, 18, 35, 45, 13, 23, 40]

[49, 10, 27, 37, 5, 15, 32]

[41, 2, 19, 29, 46, 14, 24]

[33, 43, 11, 28, 38, 6, 16]

[25, 42, 3, 20, 30, 47, 8]

[17, 34, 44, 12, 22, 39, 7]

[9, 26, 36, 4, 21, 31, 48]

经检查,行的和都是相等的

经检查,列的和都是相等的

经检查,左对角线的和都是相等的

经检查,右对角线的和都是相等的

3的倍数不行

[1, 22, 43, 55, 76, 16, 28, 49, 70]

[81, 12, 33, 54, 66, 6, 27, 39, 60]

[71, 2, 23, 44, 56, 77, 17, 29, 50]

[61, 73, 13, 34, 46, 67, 7, 19, 40]

[51, 72, 3, 24, 45, 57, 78, 18, 30]

[41, 62, 74, 14, 35, 47, 68, 8, 20]

[31, 52, 64, 4, 25, 37, 58, 79, 10]

[21, 42, 63, 75, 15, 36, 48, 69, 9]

[11, 32, 53, 65, 5, 26, 38, 59, 80]

这个不是幻方 k=[1, 0]

*/





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