第十三周项目1 验证算法

1、验证折半查找算法

#include 
#define MAXL 100
typedef int KeyType;
typedef char InfoType[10];
typedef struct
{
    KeyType key;                //KeyType为关键字的数据类型
    InfoType data;              //其他数据
} NodeType;
typedef NodeType SeqList[MAXL];     //顺序表类型

int BinSearch(SeqList R,int n,KeyType k)
{
    int low=0,high=n-1,mid;
    while (low<=high)
    {
        mid=(low+high)/2;
        if (R[mid].key==k)      //查找成功返回
            return mid+1;
        if (R[mid].key>k)       //继续在R[low..mid-1]中查找
            high=mid-1;
        else
            low=mid+1;          //继续在R[mid+1..high]中查找
    }
    return 0;
}

int main()
{
    int i,n=10;
    int result;
    SeqList R;
    KeyType a[]= {1,3,9,12,32,41,45,62,75,77},x=75;
    for (i=0; i0)
        printf("序列中第 %d 个是 %d\n",result, x);
    else
        printf("木有找到！\n");
    return 0;
}

2、验证分块查找算法

#include 
#define MAXL 100    //数据表的最大长度
#define MAXI 20     //索引表的最大长度
typedef int KeyType;
typedef char InfoType[10];
typedef struct
{
    KeyType key;                //KeyType为关键字的数据类型
    InfoType data;              //其他数据
} NodeType;
typedef NodeType SeqList[MAXL]; //顺序表类型

typedef struct
{
    KeyType key;            //KeyType为关键字的类型
    int link;               //指向对应块的起始下标
} IdxType;
typedef IdxType IDX[MAXI];  //索引表类型

int IdxSearch(IDX I,int m,SeqList R,int n,KeyType k)
{
    int low=0,high=m-1,mid,i;
    int b=n/m;              //b为每块的记录个数
    while (low<=high)       //在索引表中进行二分查找,找到的位置存放在low中
    {
        mid=(low+high)/2;
        if (I[mid].key>=k)
            high=mid-1;
        else
            low=mid+1;
    }
    //应在索引表的high+1块中,再在线性表中进行顺序查找
    i=I[high+1].link;
    while (i<=I[high+1].link+b-1 && R[i].key!=k) i++;
    if (i<=I[high+1].link+b-1)
        return i+1;
    else
        return 0;
}

int main()
{
    int i,n=25,m=5,j;
    SeqList R;
    IDX I= {{14,0},{34,5},{66,10},{85,15},{100,20}};
    KeyType a[]= {8,14,6,9,10,22,34,18,19,31,40,38,54,66,46,71,78,68,80,85,100,94,88,96,87};
    KeyType x=85;
    for (i=0; i