主要涉及:
变量:涉及定义、变量范围
操作符:+ - * / 括号等运算符
声明和表达式
控制流:条件控制判断
the decision-making statements (if-then, if-then-else, switch),
the looping statements (for, while, do-while
the branching statements (break, continue, return)
原文:http://www.cnblogs.com/clebean/p/7349670.html