LL（1）分析法的功能是利用LL（1）控制程序根据显示栈栈顶内容、向前看符号以及LL（1）分析表，对输入符号串自上而下的分析过程。-LL (1) analysis of the function is the use of LL (1) control program content according to display stack stack, forward-looking symbols and LL (1) of the table, the input symbol string of top-down analysis.