C++规定枚举的大小只要能够容纳下3bits或者4bits(上面的例子)就行,至于分配1byte还是4bytes,是编译器决定的,但是C++标准有个限制:1<=sizeof(enum)<=sizeof(int)。 实例代码: #include<iostream> usingnamespacestd; classA{ public: //enum类型本身不占内存 enumEnumTest{ a=1
当然可以加点其它,比起C要好一丢丢,然而也仅限于此。以至于当这种简单类型无法满足我们需要要扩展的时候就会使用class/struct来取代写出类似这种代码 1 2 3 4 5 6 7 8 9 10 11 12 13 14 publicsealedclassError { publicstaticreadonlySignError=newError(110,"sign error."); publicstaticreadonlyNetworkError...
AI代码解释 //定义枚举enumfruit{apple,banana,pear,fig};//普通变量使用枚举元素的常量值int a=apple;//0int b=banana;//1//输出std::cout<<a<<b<<std::endl; (9).enum代替const有什么好处呢?先看enum和const定义一个性别的代码: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 //定义enum gen...
C++惯用法之enumclass 原创lightcity 光城 2019-12-11收录于话题#C++那些事53个C++惯用法之enumclass在Effective modernC++中Item 10: Prefer scoped enums to unscopedenum,调到要用有范围的enumclass代替无范围的enum。例如:enumShape {circle,retangle};auto circle = ...
public class Main { public static void main(String[] args) throws Exception { Class stdClass = Student.class; // 获取public字段"score": System.out.println(stdClass.getField("score")); //输出public int Student.score // 获取继承的public字段"name": ...
int run(int interlaced, void **dst, const void **src, int width, int src_y_pitch_byte, int src_uv_pitch_byte, int dst_y_pitch_byte, int height, int dst_height, int *crop); @@ -133,10 +133,10 @@ class RGYConvertCSP { class RGYInputPrm { public: int threadCsp; uint32_t...
enumclassendian{little =0, big =1, native = little }; Members ElementDescription littleIndicates that scalar types are little-endian. That is, the least significant byte is stored in the smallest address. For example,0x1234is stored0x340x12. ...
C++规定枚举的大小只要能够容纳下3bits或者4bits(上面的例子)就行,至于分配1byte还是4bytes,是编译器决定的,但是C++标准有个限制:1<=sizeof(enum)<=sizeof(int)。 实例代码: #include <iostream> using namespace std; class A{ public: //enum类型本身不占内存 ...
std::error("Corrputed zero-byte string"); } DataT data[size - 1]; u8 nul [[hidden]]; if (nul != 0) { std::error("Corrputed NUL terminator"); } } [[sealed, format("format_str"), transform("format_str")]]; fn blob_data(ref auto b) { ...
V702. Classes should always be derived from std::exception (and alike) as 'public'. V703. It is suspicious that the 'foo' field in derived class overwrites field in base class. V704. The expression is always false on newer compilers. Avoid using 'this == 0' comparison. V705. It is...