1. 从键盘输入两个命题变元P和Q的真值，求它们的合取、析取、条件和双条件的真值。（A）

2. 求任意一个命题公式的真值表（B），并根据真值表求主范式（C）



注意：题目类型分为A，B，C三类，其中A为基本题，完成A类题目可达到设计的基本要求，其他均为加分题，并按字母顺序分数增加越高。-Input two propositional variables P and Q is the true value from the keyboard, find their conjunctive, disjunctive, conditional, and biconditional true value. (A)

Lord paradigm (C) (2) seek any propositional formula a truth table (B), and in accordance with the truth table



Note: topic types are divided into three categories A, B, C, where A is the basic question, to complete the Class A subject to meet the design requirements, the other are the bonus, in alphabetical order the higher the score increases.