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struct nodeClass
{
	int classID;
	double classMidtermAverage;
	struct nodeClass *next;
	struct nodeStudent *studentPtr;
};

struct nodeStudent
{
	int studentID;
	int midterm;
	struct nodeStudent *next;
};

	struct nodeStudent* head1=NULL;
	struct nodeStudent* tail1=NULL;
	struct nodeStudent* head2=NULL;
	struct nodeStudent* tail2=NULL;
	struct nodeStudent* head3=NULL;
	struct nodeStudent* tail3=NULL;
	struct nodeStudent* head4=NULL;
	struct nodeStudent* tail4=NULL;

	





void insert(struct nodeClass** head,int id,int midterm){
	if(*head==NULL){
		struct nodeClass * bir;
		bir= (struct nodeClass *)malloc(sizeof(struct nodeClass));
	    struct nodeClass * iki;
		iki= (struct nodeClass *)malloc(sizeof(struct nodeClass));
		struct nodeClass * uc;
		uc= (struct nodeClass *)malloc(sizeof(struct nodeClass));
		struct nodeClass * dort;
		dort= (struct nodeClass *)malloc(sizeof(struct nodeClass));
		*head=bir;
		bir->classID=1;
		iki->classID=2;
		uc->classID=3;
		dort->classID=4;
		bir->next=iki;
		iki->next=uc;
		uc->next=dort;
		dort->next=NULL;
	    bir->studentPtr=head1;
		iki->studentPtr=head2;
		uc->studentPtr=head3;
		dort->studentPtr=head4;
		 
		
	}
	if (id>=66000&&id<77000){
		if(head1==NULL){
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			head1=tail1=new;
		}
		else{
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			tail1->next=new;
			tail1=new;
		}
	}
	else if(id>=77000&&id<88000){
		if(head2==NULL){
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			
			head2=tail2=new;
		}
		else{
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			tail2->next=new;
			tail2=new;
		}
	}
	else if(id>=88000&&id<99000){
		if(head3==NULL){
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			head3=tail3=new;
		}
		else{
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			tail3->next=new;
			tail3=new;
		}
	}
	else if(id>=99000){
		if(head4==NULL){
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			head4=tail4=new;
		}
		else{
			struct nodeStudent *new=(struct nodeStudent *)malloc(sizeof(struct nodeStudent));
			new->midterm=midterm;
			new->studentID=id;
			new->next=NULL;
			tail4->next=new;
			tail4=new;
		}
	}
	
	
}



void computeClassAverage(struct nodeClass* head){
    struct nodeClass* sinif=head;
    printf("%d \n",sinif->next->classID);
   	struct nodeStudent* ogrenci=sinif->studentPtr;
    printf("%d \n",ogrenci->midterm);
	do{	
	    ogrenci=sinif->studentPtr;
	    int toplam=0,sayi=0;
	    double ort=0.0;
	    
	    do{
	        sayi++;	
	        toplam+=ogrenci->midterm;
	       
	        ogrenci=ogrenci->next;	
	    }while(ogrenci->next!=NULL);
	    ort=toplam/sayi;
	    sinif->classMidtermAverage=ort;
	    sinif=sinif->next;	
	}while(sinif->next!=NULL);
}

void printAll(struct nodeClass* head){
    struct nodeClass* sinif=head;
    
	struct nodeStudent* ogrenci=sinif->studentPtr;
	do{	
	ogrenci=sinif->studentPtr;
	printf("%d %f\n",sinif->classID,sinif->classMidtermAverage);
	do{	
	printf("%d %d\n",ogrenci->studentID,ogrenci->midterm);
	ogrenci=ogrenci->next;	
	}while(ogrenci->next!=NULL);
	}while(sinif->next!=NULL);
}





// You must write all the function definitions to be used in this lab into this file.
// You may also write other functions that may be called from our functions.
// Do not make any changes to the main.c file.
// Upload function.h file to the system as StudentNumber.h.