The define() function defines a constant. define()函數(shù)的作用是:定義一個常量。 Constants are much like variables, except for the following differences: 常量[constant]與變量[variable]有很多相似的地方,因此,很容易混淆;下面,我們列舉一下常量[constant]與變量[variable]之間的不同點: ?A constant's va...
有:在類體內(nèi)定義成員函數(shù):class Fred {public: void f(int i, char c) { // ... }};盡管這對于寫類的人來說很容易,但由于它將類是“什么”(what)和類“如何”(how)工作混在一起.小結(jié)總之,在嵌入式C(或C++)編程里面,懂得使用內(nèi)聯(lián)函數(shù)(inline)與宏定義(#define),并使用好它們,對我們是大有裨益的...
bool define ( string name, mixed value [, bool case_insensitive] ) Defines a named constant. See the section on constants for more details. The name of the constant is given by name; the value is given by value. The optional third parameter case_insensitive is also available. If the...