根据给的 key 求出key 所对应的 index值!!莱鸟问题,见笑啦,各位大虾!!
public class Rekusive {
static int i;
public static void main(String[] args) {
int temp=0;
float [] f ={1.0f,2.0f,3.0f,4.0f,5.0f};
Rekusive it=new Rekusive();
temp = it.index(f, 3.0f);
System.out.println(temp);
i=f.length;
}
public int index(float [] f,float key)
{
if(i==0&& f[0]==key)
return 0;
else
return (f[i--]==key)? i :index(f,key);
} }
public class Rekusive {
static int i;
public static void main(String[] args) {
int temp=0;
float [] f ={1.0f,2.0f,3.0f,4.0f,5.0f};
Rekusive it=new Rekusive();
temp = it.index(f, 3.0f);
System.out.println(temp);
i=f.length;
}
public int index(float [] f,float key)
{
if(i==0&& f[0]==key)
return 0;
else
return (f[i--]==key)? i :index(f,key);
} }
* @param args
*/ static int i;
public static void main(String[] args) {
int temp=0;
float [] f ={1.0f,2.0f,3.0f,4.0f,5.0f}; Rekusive it=new Rekusive();
temp = it.index(f, 3.0f);
System.out.println(temp);
i=f.length;
}
public int index(float [] f,float key)
{
if(f[i]==key)
return i;
else
return (f[i++]==key)? i :(i==f.length?-1:index(f,key));
} }
//没有对应的key时,index值是为-1
可是为什么return (f[i++]==key)? 我的思路不对 我认为是f[i--]==key。
因为 i=f.length; 已经等于数组的长度啦,在 f[i++] 就数组越界了呀?可是我测试你写的结果是对的,请你给我解释一下谢谢