八. 程序控制语句 ● 基础知识 算法的基本控制结构: 顺序结构(sequential structure), 选择结构(case structure), 循环结构(loop structure) case structure: ① if statement; ② nested if statement; ③ if...else if statement; ④ switch statement; loop structure: ① while statement; ② do...while st…