By the way, is the maximum space of the array m or maxsize in void enqueue (qu *sq, data type E)? If the queue is empty, it will not join the queue, so why do you want to cycle the queue?

I copied it to win_tc and compiled it. Unable to compile data type seq[m]. If you want to compile, you should write # definem5; And the return value of your dequeue algorithm is sq->; Sequ[i](datatype), then why write datatype *dequen(qu *sq) (the first *)? Why did you put sq-& gt；; The rear is equal to m-1;

This is what I don't understand. Please give me your advice.