public class Sum {
    //標記陣列
    private static int target;
    //目標陣列
    private static int a[]={0,4,3,0};;
    //迴圈數
    private static int i,j;
    //標記數
    private static int x=0;
    public static void main(String args[]){
        Scanner sc=new Scanner(System.in);
        System.out.println("請輸入目標值");
        target = sc.nextInt();
 
        //核心
        for(i=0;i<a.length;i++){
            for(j=i+1;j<a.length;j++){
                if(a[i]+a[j]==target){
                    //雙重for迴圈進行遍歷，但不重複遍歷
                    System.out.println("["+i+","+j+"]");
                    x=1;
                }
            }
        }
        //標記是否成功查詢到相關陣列
 
        if(x==0){
            System.out.println("未找到相關’和‘資料");
        }
    }
}

/**leetcode提交題解
 * class Solution {
 *     public int[] twoSum(int[] nums, int target) {
 *         for(int i=0;i<nums.length;i++){
 *             for(int j=i+1;j<nums.length;j++){
 *                 if(nums[i]+nums[j]==target){
 
 *                     return new int[]{i,j};
 *                 }
 *             }
 *         }
 *         throw new IllegalArgumentException("No two sum");
 *     }
 * }
 */