操作符(Operators) 条款5：对定制的“类型转换函数”保持警觉(Be wary of user-defined conversion functions.) 条款6：区别increment/decrement操作符的前置(prefix)和后置(postfix)形式(Distinguish between prefix and postfix forms of increment and decrement operators.) 条款7：千万不要重载&&，||和,操作符(Never overload &&, ||, or ,.) 条款8：了解各种不同意义的new和delete(Understand the different meanings of new and delete.)