statistics.cpp

1．管理信息系统（学生成绩） 两种用户等级：管理员和用户

/************************************
统计信息
*************************************/

#include "ManagerInterface.h"

void ManagerInterface::Statistics()
{
	while (1)
	{
		system("cls");
		cout<<"\n"
			<<"\t1. 学生分数统计\n"
			<<"\t2. 学生年龄统计\n"
			<<"\t3. 学生性别比例\n"
			<<"\t4. 返回上层菜单\n"
			<<"\n左边数字对应功能选择,请选择1～4: ";
		int choice;
		while (1)
		{
			cin.sync();
			cin>>choice;
			if (choice<1||choice>4) cout<<"\n输入错误,重选1～9\n";
			else break;
		}
		switch (choice)
		{
		case 1:
			InfoManager::mark();
			break;
		case 2:
			InfoManager::old();
			break;
		case 3:
			InfoManager::sex_proportion();
			break;
		case 4:
			return;
		}
	}
}

void InfoManager::mark()
{
	while (1)
	{
		Unit *p=head_stu;
		system("cls");
		cout<<"\n"
			<<"\t1. 分数段统计\n"
			<<"\t   不及格统计:\n"
			<<"\t   2. 三门课程全不及格统计\n"
			<<"\t   3. 有且仅有两门课程不及格统计\n"
			<<"\t      有且仅有单科不及格统计:\n"
			<<"\t      4. 数学\n"
			<<"\t      5. 语文\n"
			<<"\t      6. 英语\n"
			<<"\t7. 返回上层菜单\n"
			<<"\n左边数字对应功能选择,请选择1～7: ";
		int choice;
		while (1)
		{
			cin.sync();
			cin>>choice;
			if (choice<1||choice>7) cout<<"\n输入错误,重选1～7\n";
			else break;
		}
		switch (choice)
		{
		case 1:
			system("cls");
			InfoManager::mark_distributions();
			break;
		case 2:
			system("cls");
			InfoManager::mark_fail_all();
			break;
		case 3:
			system("cls");
			InfoManager::mark_fail_both();
			break;
		case 4:
			system("cls");
			InfoManager::mark_fail_single(1);
			break;
		case 5:
			system("cls");
			InfoManager::mark_fail_single(2);
			break;
		case 6:
			system("cls");
			InfoManager::mark_fail_single(3);
			break;
		case 7:
			return;
		}
	}
}


void InfoManager::mark_distributions()
{
	Unit *p=head_stu;
	int total=InfoManager::Get_Length();
	int	math_count_90_100=0, chs_count_90_100=0, eng_count_90_100=0, ave_count_90_100=0,
		math_count_80_90=0, chs_count_80_90=0, eng_count_80_90=0, ave_count_80_90=0,
		math_count_70_80=0, chs_count_70_80=0, eng_count_70_80=0, ave_count_70_80=0,
		math_count_60_70=0, chs_count_60_70=0, eng_count_60_70=0, ave_count_60_70=0,
		math_count_fail=0, chs_count_fail=0, eng_count_fail=0, ave_count_fail=0;
	while (p)
	{
		if (p->Math>=90&&p->Math<=100) math_count_90_100++;
		else if (p->Math>=80&&p->Math<=89) math_count_80_90++;
		else if (p->Math>=70&&p->Math<=79) math_count_70_80++;
		else if (p->Math>=60&&p->Math<=69) math_count_60_70++;
		else math_count_fail++;
		if (p->Chinese>=90&&p->Chinese<=100) chs_count_90_100++;
		else if (p->Chinese>=80&&p->Chinese<=89) chs_count_80_90++;
		else if (p->Chinese>=70&&p->Chinese<=79) chs_count_70_80++;
		else if (p->Chinese>=60&&p->Chinese<=69) chs_count_60_70++;
		else chs_count_fail++;
		if (p->English>=90&&p->English<=100) eng_count_90_100++;
		else if (p->English>=80&&p->English<=89) eng_count_80_90++;
		else if (p->English>=70&&p->English<=79) eng_count_70_80++;
		else if (p->English>=60&&p->English<=69) eng_count_60_70++;
		else eng_count_fail++;
		if (p->Average>=90&&p->Average<=100) ave_count_90_100++;
		else if (p->Average>=80&&p->Average<=89) ave_count_80_90++;
		else if (p->Average>=70&&p->Average<=79) ave_count_70_80++;
		else if (p->Average>=60&&p->Average<=69) ave_count_60_70++;
		else ave_count_fail++;
		p=p->next;
	}
	cout.precision(4);
	cout<<"┌────────┬────┬────┬────┬────┐"<<endl;
	cout<<"│"<<setw(6)<<"共"<<setw(3)<<total<<"人"<<"     │  数 学 │  语 文 │ 英 语  │ 平均分 │"<<endl;
	cout<<"├────┬───┼────┼────┼────┼────┤"<<endl;
	cout<<"│        │ 人数 │"<<setw(5)<<math_count_90_100<<"   │"<<setw(5)<<chs_count_90_100<<"   │"<<setw(5)<<eng_count_90_100<<"   │"<<setw(5)<<ave_count_90_100<<"   │"<<endl;
	cout<<"│ 90～100├───┼────┼────┼────┼────┤"<<endl;
	cout<<"│        │百分比│"<<setw(6)<<(double)math_count_90_100/total*100<<"% │"<<setw(6)<<(double)chs_count_90_100/total*100<<"% │"<<setw(6)<<(double)eng_count_90_100/total*100<<"% │"<<setw(6)<<(double)ave_count_90_100/total*100<<"% │"<<endl;
	cout<<"├────┼───┼────┼────┼────┼────┤"<<endl;	
	cout<<"│        │ 人数 │"<<setw(5)<<math_count_80_90<<"   │"<<setw(5)<<chs_count_80_90<<"   │"<<setw(5)<<eng_count_80_90<<"   │"<<setw(5)<<ave_count_80_90<<"   │"<<endl;
	cout<<"│ 80～90 ├───┼────┼────┼────┼────┤"<<endl;
	cout<<"│        │百分比│"<<setw(6)<<(double)math_count_80_90/total*100<<"% │"<<setw(6)<<(double)chs_count_80_90/total*100<<"% │"<<setw(6)<<(double)eng_count_80_90/total*100<<"% │"<<setw(6)<<(double)ave_count_80_90/total*100<<"% │"<<endl;
	cout<<"├────┼───┼────┼────┼────┼────┤"<<endl;		
	cout<<"│        │ 人数 │"<<setw(5)<<math_count_70_80<<"   │"<<setw(5)<<chs_count_70_80<<"   │"<<setw(5)<<eng_count_70_80<<"   │"<<setw(5)<<ave_count_70_80<<"   │"<<endl;
	cout<<"│ 70～80 ├───┼────┼────┼────┼────┤"<<endl;
	cout<<"│        │百分比│"<<setw(6)<<(double)math_count_70_80/total*100<<"% │"<<setw(6)<<(double)chs_count_70_80/total*100<<"% │"<<setw(6)<<(double)eng_count_70_80/total*100<<"% │"<<setw(6)<<(double)ave_count_70_80/total*100<<"% │"<<endl;
	cout<<"├────┼───┼────┼────┼────┼────┤"<<endl;		
	cout<<"│        │ 人数 │"<<setw(5)<<math_count_60_70<<"   │"<<setw(5)<<chs_count_60_70<<"   │"<<setw(5)<<eng_count_60_70<<"   │"<<setw(5)<<ave_count_60_70<<"   │"<<endl;
	cout<<"│ 60～70 ├───┼────┼────┼────┼────┤"<<endl;
	cout<<"│        │百分比│"<<setw(6)<<(double)math_count_60_70/total*100<<"% │"<<setw(6)<<(double)chs_count_60_70/total*100<<"% │"<<setw(6)<<(double)eng_count_60_70/total*100<<"% │"<<setw(6)<<(double)ave_count_60_70/total*100<<"% │"<<endl;
	cout<<"├────┼───┼────┼────┼────┼────┤"<<endl;		
	cout<<"│        │ 人数 │"<<setw(5)<<math_count_fail<<"   │"<<setw(5)<<chs_count_fail<<"   │"<<setw(5)<<eng_count_fail<<"   │"<<setw(5)<<ave_count_fail<<"   │"<<endl;
	cout<<"│ 不及格 ├───┼────┼────┼────┼────┤"<<endl;
	cout<<"│        │百分比│"<<setw(6)<<(double)math_count_fail/total*100<<"% │"<<setw(6)<<(double)chs_count_fail/total*100<<"% │"<<setw(6)<<(double)eng_count_fail/total*100<<"% │"<<setw(6)<<(double)ave_count_fail/total*100<<"% │"<<endl;			
	cout<<"└────┴───┴────┴────┴────┴────┘"<<endl;
	system("pause");
}

void InfoManager::mark_fail_all()
{
	Unit *p=head_stu;
	int count=0;
	Unit *i=NULL;
	Unit *j=NULL;
	while (p)
	{
		if (p->Math<60&&p->Chinese<60&&p->English<60)
		{
			++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;
	}
	cout<<"共有"<<count<<"名学生三门课程都不及格\n\n";
	j=InfoManager::SortByClass(i);
	InfoManager::Show_All_Stu(j);
	cout<<"是否保存为文件?[Y/N]";
	char choice;
	cin>>choice;
	if (choice=='N'||choice=='n') return;
	InfoManager::saveRecords(j);
}

void InfoManager::mark_fail_both()
{
	Unit *p=head_stu;
	int count=0;
	Unit *i=NULL;
	Unit *j=NULL;
	while (p)
	{
		if ((p->Math<60&&p->Chinese<60&&p->English>=60)||(p->Math<60&&p->Chinese>=60&&p->English<60)||(p->Math>=60&&p->Chinese<60&&p->English<60))
		{
			++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;
	}
	cout<<"共有"<<count<<"名学生两门课程都不及格\n\n";
	j=InfoManager::SortByClass(i);
	InfoManager::Show_All_Stu(j);
	cout<<"是否保存为文件?[Y/N]";
	char choice;
	cin>>choice;
	if (choice=='N'||choice=='n') return;
	InfoManager::saveRecords(j);
}

void InfoManager::mark_fail_single(int choice)
{
	Unit *p=head_stu;
	int count=0;
	Unit *i=NULL;
	Unit *j=NULL;

	switch (choice)
	{
	case 1:
		{
			while (p)
			{
				if (p->Math<60&&p->Chinese>=60&&p->English>=60)
				{
					++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;
			}
			cout<<"共有"<<count<<"名学生有且仅有数学不及格\n\n";
			break;
		}
	case 2:
		{
			while (p)
			{
				if (p->Math>=60&&p->Chinese<60&&p->English>=60)
				{
					++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;
			}
			cout<<"共有"<<count<<"名学生有且仅有语文不及格\n\n";
			break;
		}
	case 3:
		{
			while (p)
			{
				if (p->Math>=60&&p->Chinese>=60&&p->English<60)
				{
					++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;
			}
			cout<<"共有"<<count<<"名学生有且仅有英语不及格\n\n";
			break;
		}
	}
	j=InfoManager::SortByClass(i);
	InfoManager::Show_All_Stu(j);
	cout<<"是否保存为文件?[Y/N]";
	char judge;
	cin>>judge;
	if (judge=='N'||judge=='n') return;
	InfoManager::saveRecords(j);
}

void InfoManager::sex_proportion()
{
	Unit *p=head_stu;
	int count_male=0;
	int count_female=0;
	int total=InfoManager::Get_Length();
	while (p)
	{
		if (p->Sex==0) ++count_male;
		else ++count_female;
		p=p->next;
	}
	cout.precision(4);
	cout<<"┌────────┬────┬────┐"<<endl;
	cout<<"│"<<setw(6)<<"共"<<setw(3)<<total<<"人"<<"     │  男 生 │  女 生 │"<<endl;
	cout<<"├────┬───┼────┼────┤"<<endl;
	cout<<"│ 性 别  │ 人数 │"<<setw(5)<<count_male<<"   │"<<setw(5)<<count_female<<"   │"<<endl;
	cout<<"│        ├───┼────┼────┤"<<endl;
	cout<<"│ 比 例  │百分比│"<<setw(6)<<(double)count_male/total*100<<"% │"<<setw(6)<<(double)count_female/total*100<<"% │"<<endl;
	cout<<"└────┴───┴────┴────┘"<<endl;
	system("pause");
}

void InfoManager::old()
{
	Unit *p=head_stu;
	int count_male=0;
	int count_female=0;
	int total=InfoManager::Get_Length();
	int total_old=0;
	int total_old_male=0;
	int total_old_female=0;
	int max_male=0;
	int min_male=200;
	int max_female=0;
	int min_female=200;
	while (p)
	{
		total_old+=p->Old;
		if (p->Sex==0)
		{
			if (p->Old>max_male) max_male=p->Old;
			if (p->Old<min_male) min_male=p->Old;
			++count_male;
			total_old_male+=p->Old;
		}
		else
		{
			if (p->Old>max_female) max_female=p->Old;
			if (p->Old<min_female) min_female=p->Old;
			++count_female;
			total_old_female+=p->Old;
		}
		p=p->next;
	}
	cout<<"┌────────┬─────────┬─────────┐"<<endl;
	cout<<"│"<<setw(6)<<"共"<<setw(3)<<total<<"人"<<"     │      男  生      │      女  生      │"<<endl;
	cout<<"├────────┼────┬────┼────┬────┤"<<endl;
	cout<<"│     极  值     │  最大  │  最小  │  最大  │  最小  │"<<endl;
	cout<<"│                ├────┼────┼────┼────┤"<<endl;
	cout<<"│                │"<<setw(5)<<max_male<<"   │"<<setw(5)<<min_male<<"   │"<<setw(5)<<max_female<<"   │"<<setw(5)<<min_female<<"   │"<<endl;
	cout<<"├────────┼────┴────┼────┴────┤"<<endl;
	cout<<"│     平  均     │"<<setw(10)<<total_old_male/count_male<<"        │"<<setw(10)<<total_old_female/count_female<<"        │"<<endl;
	cout<<"└────────┴─────────┴─────────┘"<<endl;
	system("pause");
}