#include"head.h"
#include<iostream.h>

extern void SortEachClass(Student* &);

void ClassAverage(Student* &head)
{
	Student *pGuard;
	Student *p;
	double Average[MAX];   //各科目平均成績
	double TotalAverage;   //總平均成績
	int ClassNum;          //鏈表中的班級數
	int EachClassNum;      //每個班級的學生數

	SortEachClass(head);

	for(ClassNum=1,pGuard=head,p=pGuard;pGuard!=NULL;pGuard=pGuard->next)
	{
		if(pGuard->Class!=p->Class)
		{
			ClassNum++;
		}
		p=pGuard;
	}                           //求出班級個數
	
	pGuard=head;

	for(int icount=0;icount<ClassNum;icount++)
	{
		for(int i=0;i<MAX;i++)
		{                     
			Average[i]=0;
		}
		TotalAverage=0; 
		EachClassNum=0;    //以上把所有數據置為0
		
	/*	p=pGuard;
		pGuard=p->next;
		do
		{
			EachClassNum++;          //每個班級的學生數自增
			TotalAverage+=p->Average;
			for(int i=0;i<MAX;i++)
			{
				Average[i]+=p->Score[i];
			}
			
			p=pGuard;
			pGuard=pGuard->next;
		}
		while(pGuard!=NULL&&p->Class==pGuard->Class);*/

		for(p=pGuard,pGuard=pGuard->next;pGuard!=NULL&&p->Class==pGuard->Class;pGuard=pGuard->next)
		{
			EachClassNum++;          //每個班級的學生數自增
			TotalAverage+=p->Average;
			for(int i=0;i<MAX;i++)
			{
				Average[i]+=p->Score[i];
			}
			p=pGuard;
		}
		if(pGuard==NULL)             //當pGuard為NULL時,還需要加上p節點否則結果會出錯
		{
			EachClassNum++;          
			TotalAverage+=p->Average;
			for(int i=0;i<MAX;i++)
			{
				Average[i]+=p->Score[i];
			}
		}

		TotalAverage/=EachClassNum;
		for(int count=0;count<MAX;count++)
		{
			Average[count]/=EachClassNum;
		}

		cout<<"		"<<p->Class<<"班各科目的平均成績如下:"<<endl;
		cout<<"			微積分平均成績:		"<<Average[0]<<endl;
		
		cout<<"			物理平均成績:		"<<Average[1]<<endl;

		cout<<"			英語平均成績:		"<<Average[2]<<endl;

		cout<<"			C語言平均成績:		"<<Average[3]<<endl;

		cout<<"			體育平均成績:		"<<Average[4]<<endl;

		cout<<"		所有科目的平均成績為:		"<<TotalAverage<<endl<<endl<<endl;		

	}
}