冒泡排序
void BubbleSort(int *a, int n)
{
int i,j,t;
for(i=0; i<n-1; i++)
{
for(j=0; j<n-1-i; j++)
{
if(a[j]>a[j+1])
{
t = a[j];
a[j] = a[j+1];
a[j+1] = t;
}
}
}
}
选择排序
void SelectSort(int *a, int n)
{
int i,j,m,t;
for(i=0; i<n-1; i++)
{
m = i;
for(j=i+1; j<n; j++)
{
if(a[m]>a[j])
{
m=j;
}
}
t=a[m];
a[m] = a[i];
a[i] = t;
}
}
插入排序
void InsertSort(int *a, int n)
{
int in,out,t;
for(out=1; out<n; out++)
{
t = a[out];
in = out;
while(in>0 && a[in-1]>=t)
{
a[in] = a[in-1];
in--;
}
a[in] = t;
}
}
快速排序
void QuickSort(int *a, int l, int r)
{
int i,j,t;
if(l <r)
{
i=l;
j=r;
t = a[i];
while(i<j)
{
while(i<j && a[j]>t) j--;
if(i<j)
{
a[i] = a[j];
i++;
}
while(i<j && a[i]<t) i++;
if(i<j)
{
a[j] = a[i];
j--;
}
}
a[i] = t;
QuickSort(a, l, i-1);
QuickSort(a, i+1, r);
}
}
归并排序
void Merge(int *initList, int *mergeList, int left, int mid, int right)
{
int i,j,k;
i=left;
j=mid+1;
k=left;
while(i<=mid && j<=right)
{
if(initList[i]<initList[j])
{
mergeList[k++]=initList[i++];
}
else
{
mergeList[k++]=initList[j++];
}
if(i>mid)
{
while(j<=right)
{
mergeList[k++]=initList[j++];
}
}
else if(j>right)
{
while(i<=mid)
{
mergeList[k++]=initList[i++];
}
}
}
}
void MergePass(int *initList, int *mergeList, int n, int s)
{
int i,j;
for(i=0; i<=n-2*s+1; i+=2*s)
{
Merge(initList, mergeList, i, i+s-1, i+2*s-1);
}
if(i+s<n)
Merge(initList, mergeList, i, i+s-1, n-1);
else
for(j=i; j<=n-1; j++)
mergeList[j] = initList[j];
}
void MergeSort(int *a, int b, int n)
{
int s=1;
while(s<n)
{
MergePass(a, b, n, s);
s*=2;
MergePass(b, a, n, s);
}
}
基数排序
int get_index(int num, int dec,int order)
{
int i,j,n;
int index;
int div;
for(i=dec; i>order; i--)
{
n=1;
for(j=0; j<dec-1; j++)
n*=10;
div=num/n;
num-=div*n;
dec--;
}
n=1;
for(i=0;i<order-1;i++)
n*=10;
index=num/n;
return index;
}
void radis_sort(int array[], int dec, int order)
{
int i,j;
int index;
int tmp[10]={0};
int num[10]={0};
for(i=0; i<10; i++)
{
index=get_index(array[i], dec, order);
num[index]++;
}
for(i=1; i<10; i++)
num[i]+=num[i-1];
for(i=10-1;i>=0;i--)
{
index=get_index(array[i], dec, order);
{
j=--num[index];
tmp[j]=array[i];
}
}
for(i=0;i<10;i++)
{
array[i]=tmp[i];
}
}
二分查找
int BinSelect(int x, int a[], int n)
{
int low=0, hight=n-1, mid;
while(low <= hight)
{
mid = (low + hight)/2;
if(x > a[mid])
{
low = mid +1;
}
else if(x < a[mid])
{
hight = mid-1;
}
else if(x == a[mid])
{
return mid-1;
}
}
return -1;
}