已知程序如下,若X=30, Y=30, Z=30该程序执行完成后,X的值为_____。X = Z + Y; If Y < Z { X = X – Y; } Else{ X= X – Z; } X = X – Y; If X < Z { X = Y +20; } X = X – Z; If X > Y { X = X – Y; }选项: A:10; B:20; C:30; D:40 程序 已知 如下 发布时间:2024-04-10 22:35:51