Data tem structure item itemitem --item tem X T1]VM2]·MN] item item A[M.N] 问题：如何遍历 floor 12 E “向量”和“数组”？ : 四 30 30 348 Hotel analog gg… floor2 E floor I gg…g hotel room hotel corridor entire hotel Corresponding control structure instruction loop nested loops问题：如何遍历 “向量”和“数组”？