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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # 二維數組 --- ## 問題 題目:下面程序輸出什么結果? ``` package com.devin.java; public class Test { public static void main(String[] args) { int[][] x = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } }; for (int i = 0; i < x.length; i++) { int sum = 0; for (int j = 0; j < x[i].length; j++) { sum += x[i][j]; } System.out.println(sum); } } } ``` ## 結果 6 15 24 ## 結論 #### 題目中聲明創建的是二維數組,并且在聲明同時就賦值。二維數組的本質就是數組元素是一維數組,題目中使用循環對二維數組中的每一個一維數組求和。
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