C语言快速排序代码
C\u8bed\u8a00\u5feb\u901f\u6392\u5e8f\u4ee3\u7801\u91c7\u7528\u5feb\u901f\u6392\u5e8f\uff0c\u7528\u9012\u5f52\u5b9e\u73b0
#include
#define N 10 //\u5b9a\u4e49\u6392\u5e8f\u6570\u7ec4\u5143\u7d20\u4e2a\u6570
int Qsort(int start,int length,int a[])//start\u6392\u5e8f\u7684\u8d77\u59cb\uff0clength\u662f\u8981\u6392\u5e8f\u5e8f\u5217\u957f\u5ea6
{
int x = a[start];
int i,j;
i = start;
j = length -1;
while(i < j)
{
if(x < a[j])
j--;
else if(x > a[j])
{
a[i] = a[j];
a[j] = x;
i++;
}
else if(x < a[i])
{
a[j] = a[i];
a[i] = x;
j--;
}
else
i++;
}
if(start < length-1)
{
Qsort(start,i,a);
Qsort(i+1,length,a);
}
}
void main()
{
int a[N] = {0};
int i;
for(i = 0;i < N;i++)
scanf("%d",&a[i]);
Qsort(0,N,a);
for(i = 0;i < N;i++)
printf("%d ",a[i]);
}
\u7a0b\u5e8f\u6267\u884c\u65f6\u8f93\u5165N\u4e2a\u6570\uff0c\u5bf9\u8fd9N\u4e2a\u6570\u8fdb\u884c\u6392\u5e8f\uff0c\u53ef\u4ee5\u9884\u8bbeN\u7684\u957f\u5ea6
\u5feb\u901f\u6392\u5e8f\u6cd5\u201d\u4f7f\u7528\u7684\u662f\u9012\u5f52\u539f\u7406\uff0c\u4e0b\u9762\u6211\u7ed3\u5408\u4e00\u4e2a\u4f8b\u5b50\u6765\u8bf4\u660e\u201c\u5feb\u901f\u6392\u5e8f\u6cd5\u201d\u7684\u539f\u7406\u3002\u9996\u5148\u7ed9\u51fa\u4e00\u4e2a\u6570\u7ec4{53\uff0c12\uff0c98\uff0c63\uff0c18\uff0c72\uff0c80\uff0c46\uff0c 32\uff0c21}\uff0c\u5148\u627e\u5230\u7b2c\u4e00\u4e2a\u6570--53\uff0c\u628a\u5b83\u4f5c\u4e3a\u4e2d\u95f4\u503c\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8981\u628a53\u653e\u5728\u4e00\u4e2a\u4f4d\u7f6e\uff0c\u4f7f\u5f97\u5b83\u5de6\u8fb9\u7684\u503c\u6bd4\u5b83\u5c0f\uff0c\u53f3\u8fb9\u7684\u503c\u6bd4\u5b83\u5927\u3002{21\uff0c12\uff0c32\uff0c 46\uff0c18\uff0c53\uff0c80\uff0c72\uff0c63\uff0c98}\uff0c\u8fd9\u6837\u4e00\u4e2a\u6570\u7ec4\u7684\u6392\u5e8f\u5c31\u53d8\u6210\u4e86\u4e24\u4e2a\u5c0f\u6570\u7ec4\u7684\u6392\u5e8f--53\u5de6\u8fb9\u7684\u6570\u7ec4\u548c53\u53f3\u8fb9\u7684\u6570\u7ec4\uff0c\u800c\u8fd9\u4e24\u4e2a\u6570\u7ec4\u7ee7\u7eed\u7528\u540c\u6837\u7684\u65b9\u5f0f\u7ee7\u7eed\u4e0b\u53bb\uff0c\u4e00\u76f4\u5230\u987a\u5e8f\u5b8c\u5168\u6b63\u786e\u3002
\u3000\u3000\u4e00\u822c\u6765\u8bf4\uff0c\u5192\u6ce1\u6cd5\u662f\u7a0b\u5e8f\u5458\u6700\u5148\u63a5\u89e6\u7684\u6392\u5e8f\u65b9\u6cd5\uff0c\u5b83\u7684\u4f18\u70b9\u662f\u539f\u7406\u7b80\u5355\uff0c\u7f16\u7a0b\u5b9e\u73b0\u5bb9\u6613\uff0c\u4f46\u5b83\u7684\u7f3a\u70b9\u5c31\u662f--\u7a0b\u5e8f\u7684\u5927\u5fcc--\u901f\u5ea6\u592a\u6162\u3002
\u9644\u4e0a\u5feb\u901f\u6392\u5e8f\u4ee3\u7801\uff1a
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#include
void quicksort(int a[],int left,int right)
{
int i,j,temp;
i=left;
j=right;
temp=a[left];
if(left>right)
return;
while(i!=j)
{
while(a[j]>=temp&&j>i)
j--;
if(j>i)
a[i++]=a[j];
while(a[i]i)
i++;
if(j>i)
a[j--]=a[i];
}
a[i]=temp;
quicksort(a,left,i-1);
quicksort(a,i+1,right);
}
void main()
{
int a[]={53,12,98,63,18,72,80,46,32,21};
int i;
quicksort(a,0,9);
/*\u6392\u597d\u5e8f\u7684\u7ed3\u679c*/
for(i=0;i<10;i++)
printf("%4d\n",a[i]);
}
int partions(int l[],int low,int high)
{
int prvotkey=l[low];
l[0]=l[low];
while (low<high)
{
while (low<high&&l[high]>=prvotkey)
--high;
l[low]=l[high];
while (low<high&&l[low]<=prvotkey)
++low;
l[high]=l[low];
}
l[low]=l[0];
return low;
}
void qsort(int l[],int low,int high)
{
int prvotloc;
if(low<high)
{
prvotloc=partions(l,low,high); //将第一次排序的结果作为枢轴
qsort(l,low,prvotloc-1); //递归调用排序 由low 到prvotloc-1
qsort(l,prvotloc+1,high); //递归调用排序 由 prvotloc+1到 high
}
}
void quicksort(int l[],int n)
{
qsort(l,1,n); //第一个作为枢轴 ，从第一个排到第n个
}
void main()
{
int a[11]={0,2,32,43,23,45,36,57,14,27,39};
for (int b=1;b<11;b++)
printf("%3d",a[b]);
printf("\n");
quicksort(a,11);
for(int c=1;c<11;c++)
printf("%3d",a[c]);
}
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