关于结构体变量的问题
前面这两种结构体类型指针定义是一样的吗,都是定义他们为首地址,如果不一样第二种定义是什么意思?如果一样为什么我最下面那段代码老是报错呢,求指教。struct student
{
int num;
float score;
struct student *next;
}stu,p1,p2;
struct student *stu,*p1,*p2;
struct student
{
int num;
float score;
struct student *next;
}*stu,*p1,*p2;
#include <stdio.h>
#if(1)
struct object
{
float Chinese;
float Math;
float English;
}obj;
#endif
struct student
{
int num;
char *name;
struct object obj;
}*stu;
int main(void)
{
void print(struct student *p);
struct student *stu;
*stu={8,"JJ Lin",{98.5,90.0,95.5}};
print(stu);
}
void print(struct student *p)
{
printf("num :%d\n",(*p).num);
printf("name :%s\n",(*p).name);
printf("Chinese score :%.1f\n",(*p).obj.Chinese);
printf("Math score :%.1f\n",p->obj.Math);
printf("English score :%.1f\n",p->obj.English);
}
本帖最后由 jackz007 于 2021-1-19 18:11 编辑
struct student
{
int num;
float score;
struct student * next ;
}stu , p1 , p2 ;
struct student * stu , * p1 , * p2 ; // 错误,相同的变量被重复定义
struct student
{
int num;
float score;
struct student * next ;
} * stu ,* p1 ,* p2 ; // 所有变量定义正确有效
#include <stdio.h>
#if(1)
struct object
{
float Chinese ;
float Math ;
float English ;
} obj ;
#endif
struct student
{
int num ;
char name ;// name 需要实质性保存字符串,所以,不可以定义成指针
struct object obj ;
} * stu ;
int main(void)
{
void print(struct student * p) ;
struct student stu = {8,"JJ Lin",{98.5,90.0,95.5}} ; // stu 需要保存数据,不可以定义成指针,结构整体赋值只能在定义时进行
print(& stu) ;
}
void print(struct student *p)
{
printf("num :%d\n",(*p).num);
printf("name :%s\n",(*p).name);
printf("Chinese score :%.1f\n",(*p).obj.Chinese);
printf("Math score :%.1f\n",p->obj.Math);
printf("English score :%.1f\n",p->obj.English);
} jackz007 发表于 2021-1-19 18:05
大佬,再问一下,、那下面这两个是一个意思吗,结构体变量名不是表示地址吗,那定义的结构体指针变量的变量名表示啥?
struct student
{
int num;
float score;
struct student * next ;
}stu , p1 , p2
struct student
{
int num;
float score;
struct student * next ;
} * stu ,* p1 ,* p2
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