c\c++实践

最新推荐文章于 2025-03-22 01:32:44 发布

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最新推荐文章于 2025-03-22 01:32:44 发布

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分类专栏： c++ 文章标签： c语言 c++ visual studio

本文链接：https://blog.youkuaiyun.com/qq_42434039/article/details/124788013

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1.c结构体（类）

A结构体：不用new
#include <stdio.h>
#include <string.h>
struct Books
{
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
};
int main( )
{
   struct Books Book1;        /* 声明 Book1，类型为 Books */
   struct Books Book2;        /* 声明 Book2，类型为 Books */
   /* Book1 详述 */
   strcpy( Book1.title, "C Programming");
   strcpy( Book1.author, "Nuha Ali"); 
   strcpy( Book1.subject, "C Programming Tutorial");
   Book1.book_id = 6495407;
   /* Book2 详述 */
   strcpy( Book2.title, "Telecom Billing");
   strcpy( Book2.author, "Zara Ali");
   strcpy( Book2.subject, "Telecom Billing Tutorial");
   Book2.book_id = 6495700;
   /* 输出 Book1 信息 */
   printf( "Book 1 title : %s\n", Book1.title);
   printf( "Book 1 author : %s\n", Book1.author);
   printf( "Book 1 subject : %s\n", Book1.subject);
   printf( "Book 1 book_id : %d\n", Book1.book_id);
   /* 输出 Book2 信息 */
   printf( "Book 2 title : %s\n", Book2.title);
   printf( "Book 2 author : %s\n", Book2.author);
   printf( "Book 2 subject : %s\n", Book2.subject);
   printf( "Book 2 book_id : %d\n", Book2.book_id);
   return 0;
}

 B结构体做参数
#include <stdio.h>
#include <string.h> 
struct Books
{
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
};
/* 函数声明 */
void printBook( struct Books book );
int main( )
{
   struct Books Book1;        /* 声明 Book1，类型为 Books */
   struct Books Book2;        /* 声明 Book2，类型为 Books */
   /* Book1 详述 */
   strcpy( Book1.title, "C Programming");
   strcpy( Book1.author, "Nuha Ali"); 
   strcpy( Book1.subject, "C Programming Tutorial");
   Book1.book_id = 6495407;
   /* Book2 详述 */
   strcpy( Book2.title, "Telecom Billing");
   strcpy( Book2.author, "Zara Ali");
   strcpy( Book2.subject, "Telecom Billing Tutorial");
   Book2.book_id = 6495700;
   /* 输出 Book1 信息 */
   printBook( Book1 );
   /* 输出 Book2 信息 */
   printBook( Book2 );
   return 0;
}
void printBook( struct Books book )
{
   printf( "Book title : %s\n", book.title);
   printf( "Book author : %s\n", book.author);
   printf( "Book subject : %s\n", book.subject);
   printf( "Book book_id : %d\n", book.book_id);
}
C.结构体+指针：*和&配对就行，当作对象。属性用这个->
#include <stdio.h>
#include <string.h>
struct Books
{
   char  title[50];
   char  author[50];
   char  subject[100];
   int   book_id;
};
/* 函数声明 */
void printBook( struct Books *book );
int main( )
{
   struct Books Book1;        /* 声明 Book1，类型为 Books */
   struct Books Book2;        /* 声明 Book2，类型为 Books */
   /* Book1 详述 */
   strcpy( Book1.title, "C Programming");
   strcpy( Book1.author, "Nuha Ali"); 
   strcpy( Book1.subject, "C Programming Tutorial");
   Book1.book_id = 6495407;
   /* Book2 详述 */
   strcpy( Book2.title, "Telecom Billing");
   strcpy( Book2.author, "Zara Ali");
   strcpy( Book2.subject, "Telecom Billing Tutorial");
   Book2.book_id = 6495700;
   /* 通过传 Book1 的地址来输出 Book1 信息 */
   printBook( &Book1 );
   /* 通过传 Book2 的地址来输出 Book2 信息 */
   printBook( &Book2 );
   return 0;
}
void printBook( struct Books *book )
{
   printf( "Book title : %s\n", book->title);
   printf( "Book author : %s\n", book->author);
   printf( "Book subject : %s\n", book->subject);
   printf( "Book book_id : %d\n", book->book_id);
}