UNIX作業系統問題

老師出了題 UNIX的作業 攸關期末分數卻寫不出來 題目如下

Write a program that creats a ring of three processes connected by pipes. The

first process should prompt the user for a string and then send it to the second

process.The second process should reverse the string and then send it to the

third process.The third process should convert the string to uppercase and send

it back to the first process.When the first process gets the processed string,it

should display it to the terminal.When this is done , all three process should

terminate.


拜託幫幫忙 為了這題煩很久.....當與不當就在這題之隔...