struct 结构名{成员表列};

struct student{int num;char name[20];char sex;int age;float score;char addr[30];}

struct student{int num;char name[20];char sex;int age;float score;char addr[30];} student1, student2

struct　结构体名｛成员表列    ｝变量名表列；

struct｛成员表列｝变量名表列；

struct date
{int month;int day;int year;
};

struct
{int num;char name[20];char sex;struct date birthday;float score;
}boy1, boy2;

student1.numstudent1.birthday.month

student2.score = student1.score;
sum = student1.score + student2.score;
student1.age++;  ++student2.age;

#include <stdio.h>void main()
{struct student{int num;char *name;char sex;float score;} boy1;boy1.num = 007;boy1.name = "Jane";printf("The address of struct is %o :\n", &boy1 );printf("The address of num is %o :\n", &boy1.num );}

#include <stdio.h>void main()
{struct student    /*定义结构*/{            int num;            char *name;            char sex;            float score;            }boy1, boy2 = { 102, "Jane", 'M', 98.5 };boy1 = boy2;printf("Number = %d\nName = %s\nScore = %d\n", boy1.num, boy1.name, boy1.score);printf("\n\n");printf("Number = %d\nName = %s\nScore = %d\n", boy2.num, boy2.name, boy2.score);}

struct student
{int num;char name[20];char sex;int age;float score;char addr[30];};
struct student student[3];

struct student
{int num;char name[20];char sex;int age;float score;char addr[30];}student[3];

struct student
｛int num;char name[20]； char sex；     int age； float score; char addr[30]；
｝stu［2］＝ {{101，″LiLin″，′M′，18，87.5，″Beijing″｝，               {102，″Zhang″，′F′，19，99，″Shanghai″}}；　 

struct student
｛int num；…
｝；struct student　str[]{{…},{…},{…}}；

#include <stdio.h>
#include <string.h>
#include <stdlib.h>#define NUM 4
struct person
{char name[20];int count;
}candidate[NUM] = {{"小甲鱼", 0},{"苍井空", 0}, {"松岛枫", 0},{"莫丁丁", 0}};char *winner();void main()
{int i, j;char candidate_name[20];printf("欢迎进入良好公民评选投票系统:() \n\n");printf("候选人有: 小甲鱼, 苍井空, 松岛枫, 莫丁丁(路人甲)\n\n");for( i=1; i <= 10; i++ ){printf("第 %2d 位投票, 请写下支持的候选人名字: ", i);scanf("%s", candidate_name);for( j=0; j < NUM; j++ ){if( 0 == strcmp(candidate_name, candidate[j].name) ){candidate[j].count++;}}}printf("\n");for( i=0; i < 4; i++ ){printf("%s 同学得票数为: %d\n", candidate[i].name, candidate[i].count );}printf("\n");printf("本次投票活动的胜利者的: %s", winner() );printf("\n");system("pause");
}char *winner()
{int i =0 , winner = i;for( i=1; i < NUM; i++ ){if( candidate[winner].count < candidate[i].count ){winner = i;}}return candidate[winner].name;
}

#include <stdio.h>struct stu
{      int num;     char *name;      char sex;      float score;
} boy1 = {102, "Fishc", 'M', 78.5};void main()
{struct stu *pstu;pstu = &boy1;printf("Number = %d\nName = %s\n", boy1.num, boy1.name);      printf("Sex = %c\nScore = %f\n\n", boy1.sex, boy1.score);      printf("Number = %d\nName = %s\n", (*pstu).num, (*pstu).name);      printf("Sex = %c\nScore = %f\n\n", (*pstu).sex, (*pstu).score);      printf("Number = %d\nName = %s\n", pstu->num, pstu->name);      printf("Sex = %c\nScore = %f\n\n", pstu->sex, pstu->score);
}

#include <stdio.h>
#include <string.h>struct student
{int num;char *name;float score[3];
};void print(struct student);void main()
{struct student stu;stu.num = 8;stu.name = "Fishc.com!";stu.score[0] = 98.5;stu.score[1] = 99.0;stu.score[2] = 99.5;print( stu );
}void print( struct student stu )
{printf("\tnum     : %d\n", stu.num);printf("\tname    : %s\n", stu.name);printf("\tscore_1 : %5.2f\n", stu.score[0]);printf("\tscore_2 : %5.2f\n", stu.score[1]);printf("\tscore_3 : %5.2f\n", stu.score[2]);printf("\n");
}

#include <stdio.h>
#include <string.h>struct student
{int num;char name[20];float score[3];
};void print(struct student *);void main()
{struct student stu;stu.num = 8;strcpy(stu.name, "Fishc.com!"); stu.score[0] = 98.5;stu.score[1] = 99.0;stu.score[2] = 99.5;print( &stu );
}void print( struct student *p )
{printf("\tnum     : %d\n", p -> num);printf("\tname    : %s\n", p -> name);printf("\tscore_1 : %5.2f\n", p -> score[0]);printf("\tscore_2 : %5.2f\n", p -> score[1]);printf("\tscore_3 : %5.2f\n", p -> score[2]);printf("\n");
}

#include <stdio.h>struct student
{long num;  float score;struct student *next;
};void main()
{struct student a, b, c, *head;a.num = 10101; a.score = 89.5;b.num = 10103;b.score = 90;c.num = 10107;c.score = 85;head = &a;a.next = &b;b.next = &c;c.next = NULL;do{printf("%ld %5.1f\n", head->num, head->score);head = head->next;}while( head != NULL );
}

#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>#define LEN sizeof(struct student)  // student结构的大小struct student *creat();            //创建链表
void print(struct student *head);   //打印链表struct student
{int num;float score;struct student *next;
};int n; //全局变量，用来记录存放了多少数据。void main()
{struct student *stu;stu = creat();print( stu );printf("\n\n");system("pause");
}struct student *creat()
{struct student *head;struct student *p1, *p2;p1 = p2 = (struct student *)malloc(LEN);  // LEN是student结构的大小
printf("Please enter the num :");scanf("%d", &p1->num);printf("Please enter the score :");scanf("%f", &p1->score);head = NULL;     n = 0;    while( 0 != p1->num ){n++;if( 1 == n ){head = p1;                 }else{p2->next = p1;}p2 = p1;p1 = (struct student *)malloc(LEN);printf("\nPlease enter the num :");scanf("%d", &p1->num);printf("Please enter the score :");scanf("%f", &p1->score);}p2->next = NULL;return head;
}void print(struct student *head)
{struct student *p;printf("\nThere are %d records!\n\n", n);p = head;if( NULL != head ){do{printf("学号为 %d 的成绩是: %f\n", p->num, p->score);p = p->next;}while( NULL != p );}
}