Usage of typedef struct in c++

typedef struct syntax is used to create a new structure type alias. The syntax is: typedef struct struct_name {struct member declaration} new_type_name; it allows the use of aliases to replace the structure name, improving readability and maintainability properties and avoid name conflicts.

Usage of typedef struct in C

typedef struct syntax is used to create a new type alias that points to A structure. Its basic syntax is as follows:

<code class="cpp">typedef struct struct_name {
  // 结构体成员声明
} new_type_name;</code>

How to use typedef struct

1. Create a new type alias:
   Use typedef struct creates a new type alias that points to the specified structure. For example:

   <code class="cpp">typedef struct Person {
     int age;
     char *name;
   } Person_t;</code>

   Now, you can use Person_t instead of struct Person to reference the structure.

2. Using new type aliases:
   After you create a new type alias, you can use it to declare variables, function parameters, or return value types. For example:

   <code class="cpp">Person_t person;
   
   void print_person(Person_t person) {
     // 处理 Person_t 类型的 person 变量
   }</code>

3. Access structure members:
   Use the . operator to access structure members just like accessing ordinary structures Same. For example:

   <code class="cpp">person.age = 25;
   printf("%s is %d years old\n", person.name, person.age);</code>

Advantages

Using typedef struct has the following advantages:

• Readability Improvement: Using aliases makes the code easier to read and understand because it is more concise and specific.
• Maintainability enhancements: When you need to change the structure name, you only need to update the typedef instead of manually updating each structure instance in the code.
• Avoid name conflicts: If there are multiple structures with the same name, use typedef to create unique aliases to avoid conflicts.

Alternatives

Although typedef struct is usually the preferred method of creating struct aliases, the following alternatives are also available:

• using declaration: The using declaration allows the structure name to be used directly without using a typedef.

• Structure pointer: You can declare a pointer type pointing to a structure, for example:

  <code class="cpp">struct Person *person;</code>

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