mirror of
https://github.com/This-weiyuqing/DSAndOS.git
synced 2026-10-18 03:03:58 +08:00
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
//算法8.6 简单选择排序
|
|
#include <iostream>
|
|
using namespace std;
|
|
#define MAXSIZE 20 //顺序表的最大长度
|
|
typedef struct
|
|
{
|
|
int key;
|
|
char *otherinfo;
|
|
}ElemType;
|
|
//顺序表的存储结构
|
|
typedef struct
|
|
{
|
|
ElemType *r; //存储空间的基地址
|
|
int length; //顺序表长度
|
|
}SqList; //顺序表类型
|
|
|
|
void SelectSort(SqList &L)
|
|
{
|
|
//对顺序表L做简单选择排序
|
|
int i,j,k;
|
|
ElemType t;
|
|
for(i=1;i<L.length;++i)
|
|
{ //在L.r[i..L.length] 中选择关键字最小的记录
|
|
k=i;
|
|
for(j=i+1;j<=L.length;++j)
|
|
if(L.r[j].key<L.r[k].key) k=j; //k指向此趟排序中关键字最小的记录
|
|
if(k!=i) {t=L.r[i];L.r[i]=L.r[k];L.r[k]=t;} //交换r[i]与r[k]
|
|
} //for
|
|
} // SelectSort
|
|
|
|
void Create_Sq(SqList &L)
|
|
{
|
|
int i,n;
|
|
cout<<"请输入数据个数,不超过"<<MAXSIZE<<"个。"<<endl;
|
|
cin>>n; //输入个数
|
|
cout<<"请输入待排序的数据:\n";
|
|
while(n>MAXSIZE)
|
|
{
|
|
cout<<"个数超过上限,不能超过"<<MAXSIZE<<",请重新输入"<<endl;
|
|
cin>>n;
|
|
}
|
|
for(i=1;i<=n;i++)
|
|
{
|
|
cin>>L.r[i].key;
|
|
L.length++;
|
|
}
|
|
}
|
|
|
|
void show(SqList L)
|
|
{
|
|
int i;
|
|
for(i=1;i<=L.length;i++)
|
|
cout<<L.r[i].key<<endl;
|
|
}
|
|
|
|
void main()
|
|
{
|
|
SqList L;
|
|
L.r=new ElemType[MAXSIZE+1];
|
|
L.length=0;
|
|
Create_Sq(L);
|
|
SelectSort(L);
|
|
cout<<"排序后的结果为:"<<endl;
|
|
show(L);
|
|
}
|