课程设计1.cpp

试设计一个学生信息管理系统

		}
	}
	cout<<"从文件读取数据成功。"<<endl<<endl;
    return head;
}


student *number_sort(student*head)//学号排序。选择后，将链表全部读入一个数组中，将数组按关键字从小到大排序，排序后重新存储回链表中,再读入文件。
{
	student *p,stud1,stud[60];
	int i,j,k,count=0;
	p=new student;
	for(p=head;p!=NULL;p=p->next,count++)
	{
	stud[count].number=p->number;
	strcpy(stud[count].name,p->name);
	strcpy(stud[count].sex,p->sex);
    stud[count].birthday.year=p->birthday.year;stud[count].birthday.month=p->birthday.month;stud[count].birthday.day=p->birthday.day;
	stud[count].phone_number=p->phone_number;
    strcpy(stud[count].province,p->province);
	}
	
	for(i=0;i<count-1;i++)
	{
		k=i;
		for(j=i+1;j<count;j++)
			if(stud[j].number<stud[k].number)k=j;
			stud1=stud[i];stud[i]=stud[k];stud[k]=stud1;
	}
	
	for(p=head,i=0;i<count;i++,p=p->next)
	{
    p->number=stud[i].number;
	strcpy(p->name,stud[i].name);
	strcpy(p->sex,stud[i].sex);
    p->birthday.year=stud[i].birthday.year;p->birthday.month=stud[i].birthday.month;p->birthday.day=stud[i].birthday.day;
	p->phone_number=stud[i].phone_number;
    strcpy(p->province,stud[i].province);
	}
    cout<<"学号排序成功。"<<endl<<endl;
	return head;
}

student *born_sort(student*head)//出生年月排序。
{

	student *p,stud1,stud[60];
	int i,j,k,count=0;
	p=new student;
	for(p=head;p!=NULL;p=p->next,count++)
	{
	stud[count].number=p->number;
	strcpy(stud[count].name,p->name);
	strcpy(stud[count].sex,p->sex);
    stud[count].birthday.year=p->birthday.year;stud[count].birthday.month=p->birthday.month;stud[count].birthday.day=p->birthday.day;
	stud[count].phone_number=p->phone_number;
    strcpy(stud[count].province,p->province);
	}
	for(i=0;i<count-1;i++)
	{
		k=i;
		for(j=i+1;j<count;j++)
		{
			if(stud[j].birthday.year<stud[k].birthday.year)k=j;
			else if(stud[j].birthday.year==stud[k].birthday.year)
			{
				if(stud[j].birthday.month<stud[k].birthday.month)k=j;
				else if(stud[j].birthday.month==stud[k].birthday.month)
				{
					if(stud[j].birthday.day<stud[k].birthday.day)k=j;
				}
			}
		}
	stud1=stud[i];stud[i]=stud[k];stud[k]=stud1;
	}

	for(p=head,i=0;i<count;i++,p=p->next)
	{
    p->number=stud[i].number;
	strcpy(p->name,stud[i].name);
	strcpy(p->sex,stud[i].sex);
    p->birthday.year=stud[i].birthday.year;p->birthday.month=stud[i].birthday.month;p->birthday.day=stud[i].birthday.day;
	p->phone_number=stud[i].phone_number;
    strcpy(p->province,stud[i].province);
	}
   cout<<"出生年月排序成功."<<endl<<endl;
   return head;
}

void change(student*head)
{
	student *p;
	p=new student;
	long number1;
	char c='y';
	while(c=='y'||c=='Y')
	{
	cout<<"输入你想修改信息的学生的学号:";
	cin>>number1;
	for(p=head;p!=NULL;p=p->next)
	{
		if(p->number==number1)
		{
			cout<<"找到改名学生."<<endl;
			c='0';
			break;
		}
	}
	if(p==NULL)
	{
		cout<<"没有这个学号。重新输入请按y，取消输入请按n:";
		cin>>c;
	}
	}
	if(c=='n'||c=='N')return;
	else
	{
	cout<<"该学生的学号是:"<<p->number<<endl;
	cout<<"该学生的姓名是:"<<p->name<<endl;
	cout<<"该学生的性别是:"<<p->sex<<endl;
	cout<<"该学生的出生日期是:"<<p->birthday.year<<":"<<p->birthday.month<<":"<<p->birthday.day<<endl;
	cout<<"该学生的电话号码是:"<<p->phone_number<<endl;
	cout<<"该学生来自的省份是:"<<p->province<<endl<<endl;


    cout<<"请输入该学生的学号:";
    cin>>p->number;
	cout<<"请输入该学生的姓名:";
	cin>>p->name;
	cout<<"请输入该学生的性别:";
	cin>>p->sex;
	cout<<"请输入该学生的出生日期:";
	cin>>p->birthday.year>>p->birthday.month>>p->birthday.day;
	if((p->birthday.month<1||p->birthday.month>12)||(p->birthday.day<1||p->birthday.day>31))
	{
		cout<<"输入的出生年月格式有误，请重新输入。正确格式为 年 月 日."<<endl;
		cin>>p->birthday.year>>p->birthday.month>>p->birthday.day;
	}
	cout<<"请输入该学生的电话号码:";
	cin>>p->phone_number;
	cout<<"请输入该学生来自的省份:";
	cin>>p->province;
	cout<<endl;
	}
}

void del(student*head)
{
	student *p,*q;
    q=p=new student;
	long number1;
	char c='y';
	while(c=='y'||c=='Y')
	{
	cout<<"输入你想删除信息的学生的学号:";
	cin>>number1;
	for(p=head;p!=NULL;q=p,p=p->next)
	{
		if(p->number==number1)
		{
			cout<<"找到改名学生."<<endl;
			c='0';
			break;
		}
	}
	if(p==NULL)
	{
		cout<<"没有这个学号。重新输入请按y，取消输入请按n:";
		cin>>c;
	}
	}
	if(c=='n'||c=='N')return;
	else
	{
		q->next=p->next;
		delete p;
		cout<<"已经成功删除该学生的信息"<<endl<<endl;
	}
}


int main()
{
	fstream iofile("student.dat",ios::in|ios::out);
	if(!iofile)
	{
		cerr<<"open error!";
		exit(1);
	}
	int choice1,choice2,choice3;
    while(1)
{
    cout<<right<<setfill('-')<<setw(25)<<"主菜单"<<setw(25)<<'-'<<endl<<endl;
	cout<<setfill(' ')<<setw(30)<<left<<"1:学生信息输入.";
	cout<<setw(30)<<"2:学生信息查询."<<endl<<endl;
	cout<<setw(30)<<"3:插入新学生的信息.";
	cout<<setw(30)<<"4:学生信息排序."<<endl<<endl;
	cout<<setw(30)<<"5:学生信息修改.";
	cout<<setw(30)<<"6:学生信息删除."<<endl<<endl;
	cout<<setw(30)<<"7:在屏幕上显示所有学生的信息.";
	cout<<setw(30)<<"8:从文件中读取数据到内存."<<endl<<endl;
	cout<<setw(30)<<"9:将内存中的数据存入文件中.";
	cout<<setw(30)<<"0:结束程序."<<endl<<endl;
    cout<<setw(50)<<setfill('-')<<'-'<<endl;
    cout<<"请选择n:";
	cin>>choice1;
    choice2=1;
	choice3=1;
	switch(choice1)
	{
     case 0:return 0;
	 case 1:head=create(head);break;
	 case 2:while(choice2)
		  {
	       cout<<endl;
	       cout<<right<<setfill('-')<<setw(17)<<"查询菜单"<<setfill('-')<<setw(17)<<"-"<<endl;
	       cout<<1<<"学号查询。"<<endl;
	       cout<<setw(34)<<setfill('-')<<'-'<<endl;
	       cout<<2<<":姓名查询."<<endl;     
           cout<<setw(34)<<setfill('-')<<'-'<<endl;       
	       cout<<3<<":性别查询."<<endl;       
           cout<<setw(34)<<setfill('-')<<'-'<<endl;       
	       cout<<0<<":返回上一层."<<endl;       
           cout<<setw(34)<<setfill('-')<<'-'<<endl;       
           cout<<"请选择n:";       
	       cin>>choice2;       
	       switch(choice2)      
		   { 
	       case 1:numbersearch(head);break;     
	       case 2:namesearch(head);break;
	       case 3:sexsearch(head);break;
	       case 0:cout<<endl;break;
	       default:"data error.";break;
		   }
		  }break;
	  case 3:add(head);break;
	  case 4:while(choice3)
			{
				cout<<endl;
	            cout<<right<<setfill('-')<<setw(20)<<"排序菜单"<<setfill('-')<<setw(20)<<"-"<<endl;
	            cout<<1<<"学号排序。"<<endl;
	            cout<<setw(34)<<setfill('-')<<'-'<<endl;
	            cout<<2<<":出生年月排序."<<endl;      
                cout<<setw(34)<<setfill('-')<<'-'<<endl;
	            cout<<0<<":返回上一层."<<endl;       
                cout<<setw(34)<<setfill('-')<<'-'<<endl;    
				cout<<"请选择n:";       
	            cin>>choice3;
				switch(choice3)
				{
				case 1:number_sort(head);break;
				case 2:born_sort(head);break;
				case 0:cout<<endl;break;
				default:"data error.";break;
				}
			}break;
     case 5:change(head);break;
	 case 6:del(head);break;
	 case 7:display(head);break;
	 case 8:head=getvalue(head,iofile);break;//为什么要用“head=getvalue(head,iofile);”，而用“getvalue(head,iofile);”就无法带回改变后的head?毕竟head已经是全局变量了.
	 case 9: display(head,iofile);break;
	 default:"data error.";break;
	}
}
}