assign赋值语句根本不允许出现在always语句块中 位于begin/end块内的多条阻塞赋值语句是串行执行的; 但是多条非阻塞赋值语句却是并行执行的,这些非阻塞赋值语句都会在其中任何一条语句执行完成之前开始执行. 如果不赋值,wire的默认状态是高阻态,即z. Note: One thing that is common to if-else and case statement is that, if you don't cover all the cases (don't have '…