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//算法8.1 直接插入排序
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#include <iostream>
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using namespace std;
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#define MAXSIZE 20 //顺序表的最大长度
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typedef struct
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{
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int key;
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char *otherinfo;
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}ElemType;
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//顺序表的存储结构
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typedef struct
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{
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ElemType *r; //存储空间的基地址
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int length; //顺序表长度
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}SqList; //顺序表类型
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void InsertSort(SqList &L)
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{
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//对顺序表L做直接插入排序
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int i,j;
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for(i=2;i<=L.length;++i)
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if(L.r[i].key<L.r[i-1].key)
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{ //"<",需将r[i]插入有序子表
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L.r[0]=L.r[i]; //将待插入的记录暂存到监视哨中
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L.r[i]=L.r[i-1]; //r[i-1]后移
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for(j=i-2; L.r[0].key<L.r[j].key;--j) //从后向前寻找插入位置
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L.r[j+1]=L.r[j]; //记录逐个后移,直到找到插入位置
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L.r[j+1]=L.r[0]; //将r[0]即原r[i],插入到正确位置
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} //if
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} //InsertSort
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void Create_Sq(SqList &L)
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{
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int i,n;
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cout<<"请输入数据个数,不超过"<<MAXSIZE<<"个。"<<endl;
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cin>>n; //输入个数
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cout<<"请输入待排序的数据:\n";
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while(n>MAXSIZE)
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{
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cout<<"个数超过上限,不能超过"<<MAXSIZE<<",请重新输入"<<endl;
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cin>>n;
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}
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for(i=1;i<=n;i++)
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{
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cin>>L.r[i].key;
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L.length++;
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}
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}
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void show(SqList L)
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{
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int i;
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for(i=1;i<=L.length;i++)
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cout<<L.r[i].key<<endl;
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}
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void main()
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{
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SqList L;
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L.r=new ElemType[MAXSIZE+1];
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L.length=0;
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Create_Sq(L);
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InsertSort(L);
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cout<<"排序后的结果为:"<<endl;
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show(L);
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}
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