SCAU华南农业大学数据结构8621 二分查找

#include
using namespace std;
#define ERROR 0
#define OK 1
int n,key,mid;

int binary(int a[],int n)
{
    int low=0,high=n;
    while(low<=high)
    {
        mid=(low+high)/2;
        if(key==a[mid]) return OK;
        else if(key> n;
    int a[n+5];
    for(int i=0;i> a[i];
    cin >> key;
    if(binary(a,n))
        printf("The element position is %d.",mid);
    else printf("The element is not exist.");
    return 0;
}

 下面这个好像有点不太严谨：

#include
using namespace std;
int n,key;

int binary(int a[],int n)
{
    int low=0,high=n,mid;
    while(low<=high)
    {
        mid=(low+high)/2;
        if(key==a[mid]) return mid;
        else if(key> n;
    int a[n+5];
    for(int i=0;i> a[i];
    cin >> key;
    if(binary(a,n)==-1)
        printf("The element is not exist.");
    else printf("The element position is %d.",binary(a,n));
    return 0;
}