#include<stdio.h>
#include<string.h>
#include<stdlib.h>
typedef struct student
{
	char name[20];
	char gender;
	int years;
	struct student *nextp;
	struct student *prevp;
}friend;

void carinama(friend* pfriend,char nama[20]);
void displaymale(friend* pfriend);
void displayfemale(friend* pfriend);
void displayumurteman(friend* pfriend,int n);

int main()
{
	friend *pfrtemp,*pfrbefore,*pfrhead,*pfrtail;
	FILE *fop;
	char comma;
	float nilai;
	char fname[20];
	strcpy(fname,"myfriend.txt");
	if(!(fop=fopen(fname,"r")))
	{
		printf("cannot open this file !!\n");
		return 0;
	}
	else
	{
		printf("open file success !! \n");
		pfrtemp=malloc(sizeof(friend));
		fscanf(fop,"%[^,]",pfrtemp->name);
		fscanf(fop,"%c",&comma);
		if(!feof(fop))
		{
			pfrhead=pfrtemp;
			pfrtemp->prevp=NULL;
		}
		else
		{
			free(pfrtemp);
		}
		while(!feof(fop))
		{
			fscanf(fop,"%c",&pfrtemp->gender);
			fscanf(fop,"%c",&comma);
			fscanf(fop,"%d",&pfrtemp->years);
			fscanf(fop,"%c",&comma);
			pfrbefore=pfrtemp;
			pfrtemp=malloc(sizeof(friend));
			fscanf(fop,"%[^,]",pfrtemp->name);
			fscanf(fop,"%c",&comma);
			if(!feof(fop))
			{
				pfrbefore->nextp=pfrtemp;
				pfrtemp->prevp=pfrbefore;
			}
			else
			{
				pfrbefore->nextp=NULL;
				pfrtail=pfrbefore;
				free(pfrtemp);
			}
		}
	}
	fclose(fop);

	displayfromhead(pfrhead);
	displayfromtail(pfrtail);
	displayndarihead(pfrhead,1);
	displayndaritail(pfrtail,1);
	carinama(pfrhead,"kamu");
	return 0;
}

void carinama(friend* pfriend,char nama[20])
{
	char *pnama;
	pnama=nama;
	while(pfriend!=NULL)
	{
		if(!strcmp(pfriend->name,pnama)){
			printf("cari nama:\n");
			printf("Name		   : %s \n",pfriend->name);
			printf("Gender		   : %c \n",pfriend->gender);
			printf("registration years : %d \n",pfriend->years);
			printf("\n");
			break;
		}
		pfriend=pfriend->nextp;
	}
}

void displaymale(friend* pfriend)
{
	while(pfriend!=NULL)
	{
		printf("display FROM HEAD:\n");
		printf("Name			: %s \n",pfriend->name);
		printf("Gender			: %c \n",pfriend->gender);
		printf("registration years	: %d \n",pfriend->years);
		pfriend=pfriend->nextp;
		printf("\n");
	}
	printf("\n\n");
}

void displayfemale(friend* pfriend)
{
	while(pfriend!=NULL)
	{
		printf("display FROM TAIL:\n");
		printf("Name			: %s \n",pfriend->name);
		printf("Gender			: %c \n",pfriend->gender);
		printf("registration years	: %d \n",pfriend->years);
		pfriend=pfriend->prevp;
		printf("\n");
	}
	printf("\n\n");
}

void displayumurteman(friend* pfriend,int n)
{
	int i;
	for(i=0;i<n;i++)
	{
		printf("display N dari head:\n");
		printf("Name			: %s \n",pfriend->name);
		printf("Gender			: %c \n",pfriend->gender);
		printf("registration years	: %d \n",pfriend->years);
		pfriend=pfriend->nextp;
		printf("\n");
	}
	printf("\n\n");
}