search.cpp

1．管理信息系统（学生成绩） 两种用户等级：管理员和用户

/************************************
查找
*************************************/

#include "Function.h"



Unit * InfoManager::CopyMale(Unit * head, int & count)
{
	count=0;
	if (!head)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	Unit *p=head;
	Unit *i=NULL;
	while (p)
	{
		if (p->Sex==0)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (i) //追加记录
			{
				Unit *s;
				s=i;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				 //直接插入
				i=q;
			}
		}
		p=p->next;
	}
	return i;
}

Unit * InfoManager::CopyFemale(Unit * head, int & count)
{
	count=0;
	if (!head)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	Unit *p=head;
	Unit *i=NULL;
	while (p)
	{
		if (p->Sex==1)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (i) //追加记录
			{
				Unit *s;
				s=i;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				 //直接插入
				i=q;
			}
		}
		p=p->next;
	}
	return i;
}

void InfoManager::SearchByID()
{
	Unit *p1=NULL;
	Unit *p2=NULL;
	long ID;
	char choice;
	do
	{
		cout<<"\n\n\t请输入要查找的ID: ";
		p1=head_stu;
		p2=head_tea;                
		cin>>ID;
		cout<<endl;
		while (p1)
		{
			if (p1->ID==ID) break;
			else p1=p1->next;
		}
		while (p2)
		{
			if (p2->ID==ID) break;
			else p2=p2->next;
		}
		if (!p1&&!p2)
		{
			cout<<"\t不存在此用户!是否重新查找?[Y/N]";
			do
			{
				cin>>choice;
				if (toupper(choice)=='Y') break;
				else if (toupper(choice)=='N') return;
				else cout<<"\t输入错误!是否重新查找?[Y/N]"<<endl;
			} while (1);
		}
		else
		{
			cout<<"所查询的用户信息为:"<<endl;
			if (p1->ID=ID) InfoManager::Show_Sgl_Stu(p1);
			else InfoManager::Show_Sgl_Tea (p2);
			break;
		}
	} while (1);	
}

Unit * InfoManager::SearchByOld(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	count=0;
	Unit *temp=NULL;
	count = 0;
	cout<<"按年龄查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻年龄的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->Old>=low&&p->Old<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}

Unit * InfoManager::SearchByClass(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	Unit *temp=NULL;
	count = 0;
	cout<<"按班级查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻班级的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->Class>=low&&p->Class<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}

void InfoManager::SearchByName()
{
	string cName;
	
	
	Unit *p1=NULL;
	Unit *p2=NULL;
	char choice;
	do
	{
		cout<<"请输入要查找的姓名: ";
		p1=head_stu;
		p2=head_tea;                
		cin>>cName;
		cout<<endl;
		while (p1)
		{
			if (p1->Name==cName) break;
			else p1=p1->next;
		}
		if (!p1)
		{
			while (p2)
			{
				if (p2->Name==cName) break;
				else p2=p2->next;
			}
		}
		if (!p1&&!p2)
		{
			cout<<"\t不存在此用户!是否重新查找?[Y/N]";
			do
			{
				cin>>choice;
				if (toupper(choice)=='Y') break;
				else if (toupper(choice)=='N') return;
				else cout<<"\t输入错误!是否重新查找?[Y/N]"<<endl;
			} while (1);
		}
		else
		{
			cout<<"所查询的用户信息为:"<<endl;
			if (p1) InfoManager::Show_Sgl_Stu(p1);
			else InfoManager::Show_Sgl_Tea (p2);
			break;
		}
	} while (1);
}

Unit * InfoManager::SearchByChinese(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	Unit *temp=NULL;
	count = 0;
	cout<<"按语文成绩查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻成绩的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->Chinese>=low&&p->Chinese<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}

Unit * InfoManager::SearchByMath(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	Unit *temp=NULL;
	count = 0;
	cout<<"按数学成绩查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻成绩的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->Math>=low&&p->Math<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}

Unit * InfoManager::SearchByEnglish(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	Unit *temp=NULL;
	count = 0;
	cout<<"按英语成绩查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻成绩的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->English>=low&&p->English<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}

Unit * InfoManager::SearchByTotal(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	Unit *temp=NULL;
	count = 0;
	cout<<"按总分查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻总分的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->Total>=low&&p->Total<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}

Unit * InfoManager::SearchByAverage(Unit * p, int & count)
{
	if (!p)
	{
		cout<<"无查询结果"<<endl;
		return NULL;
	}
	int low, high;
	Unit *temp=NULL;
	count = 0;
	cout<<"按平均成绩查询\n"<<endl;
	cout<<"\n\n\t请输入要查寻平均成绩的范围: "<<endl;
	cout<<"下限:";
	cin>>low;
	cout<<"上限:";
	cin>>high;
	cout<<endl;
	while (p)
	{
		if (p->Average>=low&&p->Average<=high)
		{
			++count;
			Unit *q;
			q=new Unit (p->Name, p->PWD, p->Sex, p->Old, p->Class, p->ID, p->Math, p->Chinese, p->English, p->Authority);
			q->next=NULL;
			if (temp) //追加记录
			{
				Unit *s;
				s=temp;
				while (s->next) //s移到表尾
				{
					s=s->next;
				}
				s->next=q; //将新节点插入
			}
			else //空表情况
			{
				//直接插入
				temp=q;
			}
		}
		p=p->next;
	}
	return temp;
}