各种排序

cdchenli

　　数据定义



#define _LZZ_BEGIN namespace lzzs {
#define _LZZ_END }
_LZZ_BEGIN
template<class T>
void exchange(T & f, T & s)
{
T t = f;
f = s;
s = t;
};
_LZZ_END
　　冒泡



    void bubble_sort(DataType datas[], int begin, int end)
{
for (int i = end - 1; i > begin; i --)
for (int j = begin; j < i; j ++)
if (datas[j] > datas[j + 1])
exchange(datas[j], datas[j + 1]);
}
void bubble_sort( DataType datas[], int len )
{
bubble_sort(datas, 0, len);
}
　　插入



    void insert_sort(DataType datas[], int begin, int end)
{
DataType tdt;
for (int i = begin + 1; i < end; ++i)
{
tdt = datas;
int j = i - 1;
for (; j >= begin && datas[j] > tdt; --j)
datas[j + 1] = datas[j];
datas[j + 1] = tdt;
}
}
void insert_sort( DataType datas[], int len )
{
insert_sort(datas, 0, len);
}
　　快排



    int partition(DataType datas[], int begin, int end)
{
int last = end - 1;
int standard = last;
int i = begin - 1;
int j = begin;
while (j < last)
{
if (datas[j] <= datas[standard])
exchange(datas[++ i], datas[j]);
j ++;
}
exchange(datas[++ i], datas[j]);
return i;
}
void quick_sort(DataType datas[], int begin, int end)
{
if (begin < end - 1)
{
int mid = partition(datas, begin, end);
quick_sort(datas, begin, mid);
quick_sort(datas, mid + 1, end);
}
}
void quick_sort( DataType datas[], int len )
{
quick_sort(datas, 0, len);
}
　　堆排



#define P(child) ( ( ( child ) - 1) / 2 )
#define L(parent) ( ( 2 * ( parent ) ) + 1 )
#define R(parent) ( ( 2 * ( parent ) ) + 2 )
void heap_up( DataType datas[], int len, int targetidx)
{
if (targetidx >= len || targetidx <= 0)
return;
int pidx = P(targetidx);
if (datas[pidx] < datas[targetidx])
{
exchange(datas[pidx], datas[targetidx]);
heap_up(datas, len, pidx);
}
}
void heap_down( DataType datas[], int len, int targetidx)
{
if (targetidx >= len || targetidx < 0)
return;
int maxidx = targetidx;
int lidx = L(targetidx);
if ( lidx < len &&  datas[lidx] > datas[maxidx])
maxidx = lidx;
int ridx = R(targetidx);
if ( ridx < len &&  datas[ridx] > datas[maxidx])
maxidx = ridx;
if (maxidx != targetidx)
{
exchange(datas[maxidx], datas[targetidx]);
heap_down(datas, len, maxidx);
}
}
void heap_build( DataType datas[], int len )
{
for (int i = P(len - 1); i >= 0; -- i)
heap_down(datas, len, i);
}
void heap_sort( DataType datas[], int len )
{
heap_build( datas, len );
for (int i = len - 1; i > 0; --i)
{
exchange( datas[0], datas );
heap_down(datas, i, 0);
}
}
void heap_sort( DataType datas[], int begin, int end )
{
heap_sort(datas + begin, end - begin);
}