代码编辑说明文档

1 代码偏移指令offsetof

#include <stddef.h>
#include <stdio.h>

#include <stddef.h>
#include <stdio.h>
typedef struct{
   char name;
   int age1;
   int age2;
   int age3;
   int age4;
   int age5;
}person;
struct address {
   char aa;
   int bbb;
   person namePtr;
   char street[50];
   int phone;
};
   
int main()
{
   printf("address 结构中的 bbb 偏移 = %ld 字节
",offsetof(struct address, bbb));
  
   printf("address 结构中的 age2 偏移 = %ld 字节
",offsetof(struct address, namePtr)+offsetof(person, age2));
   
   printf("address 结构中的 street 偏移 = %ld 字节
",offsetof(struct address, street));
   
   printf("address 结构中的 phone 偏移 = %ld 字节
",offsetof(struct address, phone));

   return(0);
} 

　　

struct address { int aa; int bbb; int name[50]; char street[50]; int phone; }; int main() { printf("address 结构中的 name 偏移 = %ld 字节
",offsetof(struct address, name)); printf("address 结构中的 street 偏移 = %ld 字节
",offsetof(struct address, street)); printf("address 结构中的 phone 偏移 = %ld 字节
",offsetof(struct address, bbb)); return(0); }