In someone's opinions, the keyboard becomes a medium of expression for the young writer's rebelliousness.
在一些人看来，网络成了年轻写手彰显叛逆的媒介。
Done using an arithmetic expression evaluation stack: file input from the keyboard or an arithmetic expression, calculate and display the results.
利用栈完成算术表达式求值：从键盘或文件中输入算术表达式，计算其结果并显示。
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