快速排序出现的问题
昨天看了一下快速排序，《算法》这本书给出的实现感觉理解起来不是很直观，所以自己结合其他的书自己写了一个快排算法。但是运行的时候没有办法出现结果，貌似Eclipse一直在运行，必须杀进程才可以。自己刚学也不是很理解，先把代码贴出来，希望有人可以给予指点。
1 package Java; 2 3 public class QuickSort1{ 4 5 public static void quickSort(int[] a){ 6 quickSort(a, 0, a.length - 1); 7 } 8 private static void quickSort(int[] a, int first, int last){ 9 if(first < last){ 10 int pivotIndex = partition(a, first, last); 11 quickSort(a, first, pivotIndex - 1); 12 quickSort(a, pivotIndex + 1, last); 13 } 14 } 15 16 private static int partition(int[] a, int first, int last){ 17 18 int low = first + 1; 19 int high = last; 20 int pivot = a[first]; 21 22 while(true){ 23 while(a[low] <= pivot && low < last); 24 low++; 25 while(a[high] >= pivot && high > first); 26 high--; 27 if(low >= high) 28 break; 29 int temp = a[low]; 30 a[low] = a[high]; 31 a[high] = temp; 32 } 33 a[first] = a[high]; 34 a[high] = pivot; 35 return high; 36 } 37 38 private static void show(int[] a){ 39 for(int i = 0; i < a.length; i++) 40 System.out.print(a[i] + " "); 41 System.out.println(); 42 } 43 44 public static void main(String[] args){ 45 int[] a ={30, 1, 23, 232, 7, 10, 90, 17, 8}; 46 quickSort(a); 47 show(a); 48 } 49 }
╮(╯▽╰)╭，我真是蠢，语法错误了，把内嵌的while循环分号去掉就可以了。
1 package Java; 2 3 public class QuickSort1{ 4 5 public static void quickSort(int[] a){ 6 quickSort(a, 0, a.length - 1); 7 } 8 private static void quickSort(int[] a, int first, int last){ 9 if(first < last){ 10 int pivotIndex = partition(a, first, last); 11 quickSort(a, first, pivotIndex - 1); 12 quickSort(a, pivotIndex + 1, last); 13 } 14 } 15 16 private static int partition(int[] a, int first, int last){ 17 18 int low = first + 1; 19 int high = last; 20 int pivot = a[first]; 21 22 while(true){ 23 while(a[low] < pivot && low < last) 24 low++; 25 while(a[high] > pivot && high > first) 26 high--; 27 if(low >= high) 28 break; 29 int temp = a[low]; 30 a[low] = a[high]; 31 a[high] = temp; 32 } 33 a[first] = a[high]; 34 a[high] = pivot; 35 return high; 36 } 37 38 private static void show(int[] a){ 39 for(int i = 0; i < a.length; i++) 40 System.out.print(a[i] + " "); 41 System.out.println(); 42 } 43 44 public static void main(String[] args){ 45 int[] a ={30, 1, 23, 232, 7, 10, 90, 17, 80}; 46 quickSort(a); 47 show(a); 48 } 49 }
总结：粗心真是害死人！
