bai tap c nhap du lieu vao file
// XuLyFile.cpp : Defines the entry point for the console application.
// LH: 01698316659
#include "stdafx.h"
#include "stdio.h"
#include "stdlib.h"
typedef struct Link{
int data;
Link*next;
}Link;
Link*pHead=NULL;
FILE*pfile;
char*ptenfile="Data.TxT";//Dinh nghia con tro ten file
void them_dau_link(int dau);
void them_cuoi_link(int cuoi);
void ghi_file();
void doc_file();
void nhap();
{
int chon=0;
printf("Nhap 1 de tao moi danh sach.
Nhap 2 de them phan tu va'o danh sa'ch cu~.
Nhap bat ky neu muon ket thuc.");
printf("
? ");
scanf( "%d",&chon);
switch(chon)
{
case 1:
pfile=fopen(ptenfile,"w");//Tao moi file
fclose(pfile);
nhap();
ghi_file();
break;
case 2:
doc_file();
nhap();
pfile=fopen(ptenfile,"w");//Tao moi file
fclose(pfile);
ghi_file();
}
}//Ket thuc ham chinh
void them_dau_link(int dau)//Bat dau ham them du lieu vao dau link
{
Link*moi; /* Con tro toi phan tu moi */
if((moi =(Link*)malloc(sizeof(Link))) != NULL)
{
moi->data=dau;
moi->next=pHead;
pHead=moi;
}
else
printf(" %d khong the them. Bo nho day!
");//Ket thuc them vao dau
}//Ket thuc ham them_dau_link
void them_cuoi_link(int cuoi) //Bat dau ham them cuoi
{
Link*moi;
Link*truoc;
Link*timCuoi;
if((moi=(Link*)malloc(sizeof(Link)))!=NULL)
{
moi->data=cuoi;
moi->next=truoc=NULL;
timCuoi=pHead;
while(timCuoi!=NULL)
{
truoc=timCuoi;
timCuoi=timCuoi->next;
}
if(truoc==NULL)
pHead=moi;
else
truoc->next=moi;
}
else
printf("Bo nho day!Khong the them!!!
");
} //Ket thuc ham them cuoi
void ghi_file()//Bat dau ham ghi data vao file
{
Link*batdau=pHead;
while(batdau!=NULL)
{
if((pfile=fopen(ptenfile,"a"))!=NULL)
fprintf(pfile,"%d
",batdau->data);
else
{
printf("Loi! Khong ghi duoc du lieu vao file
");
return;
}
batdau=batdau->next;
}
fclose(pfile);
}//Ket thuc ham ghi data vao file
void doc_file()//Bat dau ham doc data tu file vao link
{
int value;
if((pfile=fopen(ptenfile,"r"))!=NULL)
{
fscanf(pfile,"%d",&value);
while(!feof(pfile))
{
them_cuoi_link(value);
fscanf(pfile,"%d",&value);
}
fclose(pfile);
}
else
{
printf("Khong mo duoc tep hoac tep khong ton tai!
");//?????????????????
return;
}
} // Ket thuc ham doc
void nhap()//Bat dau ham nhap du lieu de them vao link
{
char dk='y';
while(dk=='y'||dk=='Y')
{
printf("Nhap gia tri can them: ");
fflush(stdin);
scanf("%d",&temp);
them_dau_link(temp);
do
{
printf("Ban muon them tiep khong(Y/N)?");
fflush(stdin);//Xoa bo nho nhap truoc do
scanf("%c",&dk);
}
while(dk!='y'&&dk!='Y'&&dk!='n'&&dk!='N');
}
} //Ket thuc ham nhap
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