struct Student //声明结构体类型Student
{
  int num;
  char name[20];
  char sex;
  int age;
  float score;
  char addr[30];
};
Student stu[3]; //定义Student类型的数组stu

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

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

struct Student
{
  int num;
  char name[20];
  char sex;
  int age;
  float score;
  char addr[30];
}stu[3]={
  {10101,″Li Lin″,  ′M′, 18,87.5, ″103 Beijing Road″},
  {10102,″Zhang Fun″,′M′，19,99,  ″130 Shanghai Road″},
  {10104,″Wang Min″,′F′,  20,78.5, ″1010 Zhongshan Road″}
};

  stu[ ]={{…},{…},{…}};

  Student stu[ ]={{…},{…},{…}}; //已事先声明了结构体类型Student

#include <iostream>
using namespace std;
struct Person //声明结构体类型Person
{
  char name[20];
  int count;
};
int main( )
{
  //定义Person类型的数组，内容为3个候选人的姓名和当前的得票数
  Person leader[3]={"Li",0,"Zhang",0,"Fun",0};
  int i,j;
  char leader_name[20]; //leader_name为投票人所选的人的姓名
  for(i=0;i<10;i++)
  {
   cin>>leader_name; //先后输入10张票上所写的姓名
   for(j=0;j<3;j++) //将票上姓名与3个候选人的姓名比较
     //如果与某一候选人的姓名相同，就给他加一票
     if(strcmp(leader_name,leader[j].name)==0) leader[j].count++;
  }
  cout<<endl;
  for(i=0;i<3;i++) //输出3个候选人的姓名与最后得票数
  {
   cout<<leader[i].name<<":"<<leader[i].count<<endl;
  }
  return 0;
}

Zhang↙ (每次输入一个候选人的姓名)
Li↙
Fun↙
Li↙
Zhang↙
Li↙
Zhang↙
Li↙
Fun↙
Wang↙
Li:4 (输出3个候选人的姓名与最后得票数)
Zhang:3
Fun:2

#include <iostream>
#include <string>
using namespace std;
struct Person
{
string name;//成员name为字符串变量
int count;
};
int main( )
{
Person leader[3]={"Li",0,"Zhang",0,"Fun",0};
int i,j;
string leader_name;// leader_name为字符串变量
for(i=0;i<10;i++)
{
cin>>leader_name;
for(j=0;j<3;j++)
if(leader_name==leader[j].name) leader[j].count++//用“==”进行比较
}
cout<<endl;
for(i=0;i<3;i++)
{
cout<<leader[i].name<<":"<<leader[i].count<<endl;
}
return 0;
}

#include <iostream>
#include <string>
using namespace std;
int main( )
{
  struct Student//声明结构体类型student
  {
   int num;
   string name;
   char sex;
   float score;
  };
  Student stu;//定义Student类型的变量stu
  Student *p=&stu;//定义p为指向Student类型数据的指针变量并指向stu
  stu.num=10301;//对stu中的成员赋值
  stu.name="Wang Fun";//对string变量可以直接赋值
  stu.sex='f';
  stu.score=89.5;
  cout<<stu. num<<" "<<stu.name<<" "<<stu.sex<<" "<<
  stu.score<<endl;
  cout<<p -> num<<" "<<(*p).name<<" "<<(*p).sex<<" "<<(*p).score<<endl;
  return 0;
}

struct Student
{
  int num;
  float score;
  Student *next; //next指向Student结构体变量
};

#define NULL 0
#include <iostream>
using namespace std;
struct Student
{
  long num;
  float score;
  struct Student *next;
};
int main( )
{
  Student a,b,c,*head,*p;
  a. num=31001;
  a.score=89.5; //对结点a的num和score成员赋值
  b. num=31003;
  b.score=90; //对结点b的num和score成员赋值
  c. num=31007;
  c.score=85; //对结点c的num和score成员赋值
  head=&a; //将结点a的起始地址赋给头指针head
  a.next=&b; //将结点b的起始地址赋给a结点的next成员
  b.next=&c; //将结点c的起始地址赋给b结点的next成员
  c.next=NULL; //结点的next成员不存放其他结点地址
  p=head; //使p指针指向a结点
  do
  {
   cout<<p->num<<" "<<p->score<<endl; //输出p指向的结点的数据
   p=p->next; //使p指向下一个结点
  } while (p!=NULL); //输出完c结点后p的值为NULL
  return 0;
}