verilog used but never assigned

verilog used but never assigned 'e' is assigned a value which is never used in function main 经常出现'b' is assigned a value that is never used.c语言中怎样才算使用了一个 warning:#550-D:variable "a" was set but never used I used to go to the cinema a lot,but i never have the time n I used to write to him,but he never r_ to any of my letters 英语翻译Many people never give up but get used to them and try t l never used to be afraid of flying,but l am now.这道题怎么翻译 He never criticized us,but used praise to bring out our best when i was a child,i never used to eat meat,but i eeat it no I was in charge of grading all the assigned homework.I never never but的用法