#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
int main()
{
    FILE *fp;
    char filename[15] = "NguyenAm.txt";
    char ch;
    char DL[101];
    fp = fopen(filename,"w");
    if(fp == NULL)
        {
            printf("Tep tin khong ton tai !");
            getch();
            exit(1);
        }    
    fflush(stdin);
    printf("Nhap vao du lieu : \n");
    gets(DL);
    fprintf(fp,"%s",DL);
    fclose(fp);
    fp = fopen(filename,"r");
    printf("Du lieu da nhap la : \n");
    while((ch = getc(fp))!= EOF)
            printf("%c",ch);
    fclose(fp);
    getch();
}