please bosses to look at the homework!!!!!!

CodePudding user response:

Turn the JDK API, basis questions generally baidu can come out

CodePudding user response:

Right upstairs, homework b

CodePudding user response:

Question 1 with shell can solve them

CodePudding user response:

reference jicongyuan reply: 3/f

question 1 in shell can solve

S="string"
Echo ${# s}
Try this one