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签到天数: 2 天 [LV.1]初来乍到
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- C语言趣味程序百例精解之JAVA实现(98)八皇后问题
- [img]http://img.javaxxz.com/2014/11/26/000607375.jpg[/img]
- public class NQueen{
- int count=0;
- int x[]=new int[9];
- public void print(){
- System.out.printf("(%d>>",++count);
- for(int i=1;i<=8;i++)
- System.out.printf("%3d",x[i]);
- System.out.println();
- }
-
- public boolean canPlace(int k){
- for(int i = 1; i < k; i++){
- //判断处于同一列或同一斜线
- if(x[i] == x[k] || Math.abs(k-i) ==Math.abs(x[k]-x[i]))
- return false;
- }
- return true;
- }
-
- public void queen(int i){ //8皇后的回溯代码
- if(i> 8){
- print();
- return;
- }
- for(int j = 1; j <= 8; j++){
- x[i] = j;//记录所放的列
- if(canPlace(i)) queen(i+1);
- }
- }
- public static void main(String args[]){
- new NQueen().queen(1);
- }
- }
- 运行:
-
复制代码
C:java>javac NQueen.java C:java>java NQueen
(1>> 1 5 8 6 3 7 2 4
(2>> 1 6 8 3 7 4 2 5
(3>> 1 7 4 6 8 2 5 3
(4>> 1 7 5 8 2 4 6 3
(5>> 2 4 6 8 3 1 7 5
(6>> 2 5 7 1 3 8 6 4
(7>> 2 5 7 4 1 8 6 3
(8>> 2 6 1 7 4 8 3 5
(9>> 2 6 8 3 1 4 7 5
(10>> 2 7 3 6 8 5 1 4
(11>> 2 7 5 8 1 4 6 3
(12>> 2 8 6 1 3 5 7 4
(13>> 3 1 7 5 8 2 4 6
(14>> 3 5 2 8 1 7 4 6
(15>> 3 5 2 8 6 4 7 1
(16>> 3 5 7 1 4 2 8 6
(17>> 3 5 8 4 1 7 2 6
(18>> 3 6 2 5 8 1 7 4
(19>> 3 6 2 7 1 4 8 5
(20>> 3 6 2 7 5 1 8 4
(21>> 3 6 4 1 8 5 7 2
(22>> 3 6 4 2 8 5 7 1
(23>> 3 6 8 1 4 7 5 2
(24>> 3 6 8 1 5 7 2 4
(25>> 3 6 8 2 4 1 7 5
(26>> 3 7 2 8 5 1 4 6
(27>> 3 7 2 8 6 4 1 5
(28>> 3 8 4 7 1 6 2 5
(29>> 4 1 5 8 2 7 3 6
(30>> 4 1 5 8 6 3 7 2
(31>> 4 2 5 8 6 1 3 7
(32>> 4 2 7 3 6 8 1 5
(33>> 4 2 7 3 6 8 5 1
(34>> 4 2 7 5 1 8 6 3
(35>> 4 2 8 5 7 1 3 6
(36>> 4 2 8 6 1 3 5 7
(37>> 4 6 1 5 2 8 3 7
(38>> 4 6 8 2 7 1 3 5
(39>> 4 6 8 3 1 7 5 2
(40>> 4 7 1 8 5 2 6 3
(41>> 4 7 3 8 2 5 1 6
(42>> 4 7 5 2 6 1 3 8
(43>> 4 7 5 3 1 6 8 2
(44>> 4 8 1 3 6 2 7 5
(45>> 4 8 1 5 7 2 6 3
(46>> 4 8 5 3 1 7 2 6
(47>> 5 1 4 6 8 2 7 3
(48>> 5 1 8 4 2 7 3 6
(49>> 5 1 8 6 3 7 2 4
(50>> 5 2 4 6 8 3 1 7
(51>> 5 2 4 7 3 8 6 1
(52>> 5 2 6 1 7 4 8 3
(53>> 5 2 8 1 4 7 3 6
(54>> 5 3 1 6 8 2 4 7
(55>> 5 3 1 7 2 8 6 4
(56>> 5 3 8 4 7 1 6 2
(57>> 5 7 1 3 8 6 4 2
(58>> 5 7 1 4 2 8 6 3
(59>> 5 7 2 4 8 1 3 6
(60>> 5 7 2 6 3 1 4 8
(61>> 5 7 2 6 3 1 8 4
(62>> 5 7 4 1 3 8 6 2
(63>> 5 8 4 1 3 6 2 7
(64>> 5 8 4 1 7 2 6 3
(65>> 6 1 5 2 8 3 7 4
(66>> 6 2 7 1 3 5 8 4
(67>> 6 2 7 1 4 8 5 3
(68>> 6 3 1 7 5 8 2 4
(69>> 6 3 1 8 4 2 7 5
(70>> 6 3 1 8 5 2 4 7
(71>> 6 3 5 7 1 4 2 8
(72>> 6 3 5 8 1 4 2 7
(73>> 6 3 7 2 4 8 1 5
(74>> 6 3 7 2 8 5 1 4
(75>> 6 3 7 4 1 8 2 5
(76>> 6 4 1 5 8 2 7 3
(77>> 6 4 2 8 5 7 1 3
(78>> 6 4 7 1 3 5 2 8
(79>> 6 4 7 1 8 2 5 3
(80>> 6 8 2 4 1 7 5 3
(81>> 7 1 3 8 6 4 2 5
(82>> 7 2 4 1 8 5 3 6
(83>> 7 2 6 3 1 4 8 5
(84>> 7 3 1 6 8 5 2 4
(85>> 7 3 8 2 5 1 6 4
(86>> 7 4 2 5 8 1 3 6
(87>> 7 4 2 8 6 1 3 5
(88>> 7 5 3 1 6 8 2 4
(89>> 8 2 4 1 7 5 3 6
(90>> 8 2 5 3 1 7 4 6
(91>> 8 3 1 6 2 5 7 4
(92>> 8 4 1 3 6 2 7 5
源码下载:http://file.javaxxz.com/2014/11/26/000607609.zip |
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