二分查找（递归与非递归）

递归方法

int BinSearch(int Array[],int low,int high,int key/*要找的值*/) { if (low<=high) { int mid = (low+high)/2; if(key == Array[mid]) return mid; else if(key<Array[mid]) return BinSearch(Array,low,mid-1,key); else if(key>Array[mid]) return BinSearch(Array,mid+1,high,key); } else return -1; }

非递归方法

int BinSearch(int Array[],int SizeOfArray,int key/*要找的值*/) { int low=0,high=SizeOfArray-1; int mid; while (low<=high) { mid = (low+high)/2; if(key==Array[mid]) return mid; if(key<Array[mid]) high=mid-1; if(key>Array[mid]) low=mid+1; } return -1; }