教學筆記：C# 交錯陣列宣告、初始化與雙重 foreach 遍歷（三）

交錯陣列逐步建構

string[][] xinxi = new string[3][];
xinxi[0] = new string[] { "姓名", "口頭禪", "籍貫" };
xinxi[1] = new string[] { "劉大夫", "很是費勁", "《一日一囧》" };
xinxi[2] = new string[2];
xinxi[2][0] = "蠟筆小新";
xinxi[2][1] = "老婆！";

// 雙重 foreach
foreach (string[] hang in xinxi)
{
    foreach (string lie in hang)
        Console.Write(lie);
    Console.WriteLine();
}

for 迴圈遍歷寫法

for (int i = 0; i < xinxi.Length; i++)
    for (int j = 0; j < xinxi[i].Length; j++)
        if (xinxi[i][j] != null) Console.Write(xinxi[i][j]);
        else Console.Write("-------");

交錯陣列特性：必須先取得行陣列，再遍歷該行的列。