结构体和指针

 

结构体包含结构体：

#include "stdafx.h"
#include <stdlib.h> 

struct data 
...{
    int day,month,year;
} ;

struct stu 
...{
    char name[20];
    long num;
    struct data birthday; 
} ;

int main() 
...{
    struct stu *student; 

    // 申请内存
    student = (struct stu *)malloc(sizeof(struct stu)); 
    
    printf("Input name,number,year,month,day: ");

    scanf("%s",&student->name); 
    scanf("%ld",&student->num);
    scanf("%d%d%d",&student->birthday.year,&student->birthday.month,&student->birthday.day);

    printf(" Output name,number,year,month,day ");

    printf("%20s%10ld%10d/%d/%d ",student->name,student->num,student->birthday.year,
            student->birthday.month,student->birthday.day);

    // 释放内存
    free(student);

    return 0;
}

 结构体和指针

 

#include "stdafx.h"
#include <stdlib.h> 

struct data 
...{
    int day,month,year;
} ;

struct stu 
...{
    char name[20];
    long num;
    struct data birthday; 
} ;

int main() 
...{
    int i;
    struct stu *p,student[4]=...{
                                ...{"liying",1,1978,5,23},
                                ...{"wangping",2,1979,3,14},
                                ...{"libo",3,1980,5,6},
                                ...{"xuyan",4,1980,4,21}
    };

    /**//*定义结构体数组并初始化*/
    p=student;

    printf(" ----Outputname,number,year,month,day ");

    for(i=0;i<4;i++)
    printf("%20s% 10ld% 10d/%d /%d ",
            (p+i)->name,
            (p+i)->num,
            (p+i)->birthday.year,(p+i)->birthday.month,(p+i)->birthday.day);

    return 0;
}

 

p->num = (*p).num