链表的维护与文件形式的保存

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<time.h>
#include<malloc.h>
typedef struct goods{
	char name[20];        //家电名称
	char trademark[20];   //品牌
	char pirce[20];         //单价
	char count[20];         //数量
	struct goods *next;
}GOODS;
void MEAN();
void CHECK();
char WELCOME();
GOODS *CREATLIST(GOODS *r);
GOODS  *OUTLIST(GOODS *r);
GOODS *DELETELIST(GOODS *r);
GOODS *INSERTLIST(GOODS *r);
void SEARCHLIST(GOODS *r);
GOODS *UPDATELIST(GOODS *r);
void WRITELIST(GOODS *r);
GOODS *LOADLIST(GOODS *r);
GOODS *SORTLIST(GOODS *r);
FILE * fp;
void main(){                          //主函数
	char select,t;
	GOODS *r;
	r=(GOODS *)malloc(sizeof(GOODS));
	r=NULL;
	MEAN();
	CHECK();	
	do{
		system("cls");
		do{
			select=WELCOME();
			switch(select){
			case '1':
				system("cls");
				r=CREATLIST(r);
				break;
			case '2':
				system("cls");
				r=LOADLIST(r);
				break;
			case '3':
				system("cls");
				r=INSERTLIST(r);
				break;
			case '4':
				system("cls");
				r=DELETELIST(r);
				break;
			case '5':
				system("cls");
				SEARCHLIST(r);
				break;
			case '6':
				system("cls");
				r=UPDATELIST(r);
				break;
			case '7':
				system("cls");
				r=OUTLIST(r);
				break;
			case '8':
				system("cls");
				WRITELIST(r);
				break;
			case '0':exit(0);
			default  :
				system("pause");
				system("cls");
				printf(" * ===================================================================== *");
				printf("\n * 当前状态:请您重新选择！                                               *\n");
			}
		}while(select<0 || select>8);
		printf("继续操作请输入(y)：");		
		getchar();
		t=getchar();
	}while(t=='y');
}
void MEAN(){            //登入菜单1
	long t;
	struct tm *st;
	char *ch;
	time(&t);
	ch=ctime(&t);
	st=localtime(&t);
	printf(" * ==================================================================  *");
	printf("\n *                                                                     *");
	printf("\n *                     欢迎使用家电库存管理系统                        *");
	printf("\n *                                                                     *");
	printf("\n *                                                                     *");
	printf("\n *                     当前系统日期：%d年%2d月%2d日                    *",st->tm_year+1900,st->tm_mon+1,st->t