使用c语言指针和递归方法实现二分查找，符输入语句与打印语句。

#include
  
   
//binary search init 
int binsearch(int low, int height, int *ptr, int);
int main(){
    int i = 0;
    int arr[10];
    int *ptr=arr;
    for(i=0;i<10;i++)
        scanf("%d",arr+i);
    printf("the input data is:\n");
    for(i=0;i<10;i++)
        printf("%d",arr[i]);
    printf("\n开始折半查找\n");
    printf("\n输入要查找的数\n");
    int m;
    scanf("%d",&m);
    int j;
    j = binsearch(0,9,ptr,m);
    printf("\n*ptr=%d,j=%d\n",*ptr,j);
    return 0;
}

int binsearch(int low,int height, int *ptr, int value){
    if (ptr == NULL || low > height) return -1; 
    printf("\nlow=%d,height=%d,\n",low,height);
    if(*(ptr+low) == value) { ptr+=low; return low;}
    if(*(ptr+height) == value) { ptr+=height; return height;}
    if(low == height){
        printf("low==height = %d",low);
        if(*(ptr+low) == value) { ptr+=low; return low;}
        else return -1; 
    }   
    int mid = (low + height) / 2;
    int result;
    printf("\nlow=%d,height=%d,mid=%d\n",low,height,mid);
    printf("*(ptr+mid)=%d,value=%d",*(ptr+mid),value);
    // 还得防止当查所的值不存在时，由于递归引起的无限循环
    if(*(ptr+mid) == value) { 
        printf("return mid = %d",mid);
        ptr+=mid; 
        return mid;
    }   
    else if(*(ptr+mid) > value) {return binsearch(low,mid-1,ptr,value);}
    else {return binsearch(mid+1,height,ptr,value);}
    return -1; 
}