C typedefGROUP *PG;/* Uses the previous typedef name to declare a pointer */ 类型PG被声明为指向GROUP类型的指针,而 类型又被定义为结构类型。 C typedefvoidDRAWF(int,int); 此示例为不返回值并采用两个 int 参数的函数提供了类型DRAWF。 例如,这意味着声明 C DRAWF box; 等效于声明 C voidbox(int,int); 请参阅 声明和类型 反馈 此页面是否有帮助? ...
C typedefGROUP *PG;/* Uses the previous typedef name to declare a pointer */ 类型PG被声明为指向GROUP类型的指针,而 类型又被定义为结构类型。 C typedefvoidDRAWF(int,int); 此示例为不返回值并采用两个 int 参数的函数提供了类型DRAWF。 例如,这意味着声明 ...
A pointer value is a reference to an object of the pointer's base type. Pointers are often but not always implemented as addresses. They are most often used to implement recursive data types. A type T is recursive if an object of type T may contain one or more references to other ...
enum。Win32 API函数，甚至操作系统基本都是用 C 语言编写的。到 C++ 语言就不用这么写了。以下代码...
// C++11 using func = void(*)(int); // C++03 equivalent: // typedef void (*func)(int); // func can be assigned to a function pointer value void actual_function(int arg) { /* some code */ } func fptr = &actual_function; 機制的限制 typedef 是它不適用於範本。 不過,C++11 ...
In C programming, we can use the typedef with pointers. Let us see an example, typedef int*intPtr; typedef char* charPtr; After the above statement, intPtr becomes an alias of a pointer to int and charPtr becomes an alias of a pointer to char. So if we need to declare the pointer...
Pointer Array enum struct union Bit-field Atomic types (C11) const constexpr (C23) volatile restrict (C99) Alignment specifiers (C11) Storage duration and linkage External and tentative definitions typedef Static assertions (C11) Attributes (C23) The typedef declaration provides a way to declare an...
IntPointer p = &a;// IntPointer 等价于 int*printf("Value of a: %d\n", *p);return0; } 5、typedef 和复杂数据类型 对于多重指针或函数指针等复杂类型,typedef可以大大简化代码,使声明和使用更易读。 #include<stdio.h>// 定义一个函数指针类型typedefvoid(*FuncPointer)(int);voidprintNumber(intnum...
,这在 C 语言里很常见,避免每次用类名时都写一遍 struct、enum。Win32 API 函数,甚至操作系统基本都是用 C 语言编写的。到 C++ 语言就不用这么写了。以下代码为 Android native 层暴露出来的类。 // code from android/asset_manager.hstructAAssetManager;typedefstructAAssetManagerAAssetManager;structAAssetDir...
// C++11 using func = void(*)(int); // C++03 equivalent: // typedef void (*func)(int); // func can be assigned to a function pointer value void actual_function(int arg) { /* some code */ } func fptr = &actual_function; 機制的限制 typedef 是它不適用於範本。 不過,C++11 ...