ÿ 在 txt 文件中打印为 EOF

Question

I have a program designed to manage student records in a txt file. I am attempting to delete a student record. The program opens the file, reads the contents and prints them for the user to see. The user then enters an integer for which line they wish to remove. It then returns the new content for the user to see.

int deleteStudent()
{
    FILE *dOldFile, *dNewFile;//Original file and New temp file
    char ch;
    int deleteLine, temp = 1;

    dOldFile = fopen(fName, "r");//fName is name of file user enters in previous function
    ch = getc(dOldFile);
while (ch != EOF)
{
    printf("%c", ch);//Prints content of Original file for user to see
    ch = getc(dOldFile);
}
rewind(dOldFile);
printf(" \n Enter line number of the line to be deleted:\n>");
scanf("%d", &deleteLine);//user selects which line of file to be removed


dNewFile = fopen("copy.c", "w");
ch = getc(dOldFile);
while (ch != EOF)
{
    ch = getc(dOldFile);
    if (ch == '\n')
        temp++;
        if (temp != deleteLine) //except the line to be deleted
        {
            putc(ch, dNewFile); //copy all lines in file copy.c
        }
}
fclose(dOldFile);
fclose(dNewFile);
remove(fName);
rename("copy.c", fName);
printf("\n Student Records Remaining:\n");
dOldFile = fopen(fName, "r");
ch = getc(dOldFile);
while (ch != EOF)
{
    printf("%c", ch);
    ch = getc(dOldFile);
}
fclose(dOldFile);
printf("\n");
return 0;
}

The issue is, and I believe it may be an issue with my while loops, is the contents printed to the new and renamed text file from fprintf has the first character removed, and from what I understand, a symbol for EOF printed at the end of the edit. For example the original file had

23 John Smith 18 5555555
24 Tom Costa 15 5555555
25 Barry West 35 5555555
26 Daren carr 22 5555555

If the user decides to delete line 3 for example. This is the result in the txt file

3 John Smith 18 5555555
24 Tom Costa 15 5555555
26 Daren carr 22 5555555ÿ

Answer 1

Every thing is fine.Just replace the while loop with the while loop and delete the

 ch = getc(dOldFile);

before the while as shown :

dNewFile = fopen("copy.c", "w");
//ch = getc(dOldFile);    comment this out
while((ch = getc(dOldFile))!=EOF)
  {       
   if (ch == '\n')
    temp++;
    if (temp != deleteLine) //except the line to be deleted
    {
        putc(ch, dNewFile); //copy all lines in file copy.c
    }
   }   //modify while to make it better
  fclose(dOldFile);
  fclose(dNewFile);