验证折半查找算法

问题及代码：

---

代码：

#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[]= {12,18,24,35,47,50,62,83,90,115,134},x=100;  
    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;  
}

---

运行结果：

X=47时

---

X=90时

---

X=100时

---

知识点总结：

折半查找算法的验证。