桶排序

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 
 4 void sortAges(int a[],int n)
 5 {
 6     const int MAXAGE=99;
 7     if(a==NULL||n<=0)
 8         return;
 9     int ageTimes[MAXAGE+1];
10     int i,j,age,counts;
11     for(i=0; i<=MAXAGE; ++i)
12         ageTimes[i]=0;
13     //读入年龄放入数组中
14     for(i=0; i<n; ++i)
15     {
16         age=a[i];
17         ageTimes[age]++;
18     }
19     //把排完序的结果写入数组中
20     int k=0;
21     for(i=0; i<=MAXAGE; ++i)
22     {
23         counts=ageTimes[i];
24         for(j=0; j<counts; ++j)
25         {
26             a[k]=i;
27             k++;
28         }
29 
30     }
31 
32 }
33 
34 int main()
35 {
36     int a[]= {10,10,3,4,5,6,6,72,2,4,43,2,2,1};
37     int n=sizeof(a)/sizeof(int);
38     int i;
39     sortAges(a,n);
40     for(i=0; i<n; ++i)
41         printf("%d\n",a[i]);
42     return 0;
43 }