public static void find(int[] A, int p, int r, int findNum){
		if(findNum == A[p]){
			Print.println("The number have fond,the index is " + p);
			return;
		}
		if(p == r){
			Print.println("The number have not fond, the index is " + p);
		}
		
		if(p < r){
			int q = (p + r) / 2;
			if(A[q] > findNum){
				find(A,p,q,findNum);
			}else if(A[q] < findNum){
				find(A,q+1,r,findNum);
			}else{
				Print.println("The number have fond,the index is " + q);
			}
		}
		
	}