第八章作业

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本文通过几个具体的C++编程示例介绍了如何使用结构体来组织数据，并展示了如何利用数组来存储多个结构体实例。这些示例包括学生信息的创建、赋值、排序及输出等操作。

书上例题

8.1

#include<iostream>
using namespace std;
struct date
{
	int month;
	int day;
	int year;
};
struct student
{
	int num;
	char name[20];
	struct date brithday;
	char addr[30];
};
int main()
{
	student stu1;
	stu1.num=1001;
	stu1.brithday.month=8;
	stu1.brithday.day=20;
	stu1.brithday.year=1980;
	cout<<stu1.num<<"  ";
	cout<<stu1.brithday.month<<"  ";
	cout<<stu1.brithday.day<<"  ";
	cout<<stu1.brithday.year<<endl;
	return 0;
}

8.2

#include<iostream>
using namespace std;
int main()
{
	struct
	{
		int num;
		int age;
	}stu1,stu2;
	stu1.num=1001;
	stu1.age=20;
	stu2=stu1;
	cout<<stu2.num<<endl;
	cout<<stu2.age<<endl;
	return 0;
}

8.3、

#include<iostream>
using namespace std;
struct student
{
	int num;
	char name[20];
	float score;
};
int main()
{
	student stu[3]={{1001,"Liu Jin",75},{1002,"Li Lan",82},
	{1003,Ma Kai",80}};
	student temp;
	for(int i=1;i<3;i++)
		for(int j=0;j<=2-i;j++)
			if(stu[j].score<stu[j+1].score)
			{
				temp = stu[j];stu[j]=stu[j+1];stu=[j+1]=temp;
			}
			cout<<"Num"<<"Name"<<"score"<<endl;
			for(int k=0;k<3;k++)
				cout<<stu[k].num<<"  "<<stu[k].name<<"  "<<stu[k].score<<endl;
			return 0;
	}

8.4

#include<iostream>
using namespace std;
struct student
{
	int num;
	char name[20];
	float score;
};
int main()
{
	student stu[3]={{1001,"liu jin",75},{1002,"li lan",82},
	{1003,"ma kai",80}}
	student*s=stu;
	cout<<"num"<<\tname"<<\t\tscore"<<endl;
	for(;s<stu+3;s++)
		cout<<s->num<<"\t"<<s->name<<"\t\t"<<s->score<<endl;
		return 0;
}

8.5

#include<iostream>
using namespace std;
struct student
{
	int num;
	char name[20];
	float score;
};
void print(student*ps)
{
	cout<<ps->num<<"  "<<ps->name<<"  "<<ps->score<<endl;
}
int main()
{
	student stu[3]={{1001,"liu jin",75},{1002,"li lan",82},
	{1003,"ma kai",80}};
	for(int i=0;i<3;i++)
	{
		print(&stu[i]);
	}
	return 0;
}