user input not saving to file

Question

hi guys, so i created 2 text file where my user and staff data respectively can be stored but my data doesn't get stored but the code is running perfectly.
This is my code
FILE *usr;
FILE *staf;
usr = fopen("users.txt","a+");
staf = fopen("staff.txt","a+");

// some data to be collected

if (choice == 's')
{
fscanf(staf,"staffs: %d/%d/%d %s %s %s %s %s %d %s\n ",&add.month,&add.day,&add.year,add.name,choice,add.staff.username,add.password,add.email,&add.number);
fprintf(staf,"staffs: %d/%d/%d %s %s %s %s %s %d %s\n ",&add.month,&add.day,&add.year,add.name,choice,add.staff.username,add.password,add.email,&add.number);
fclose(staf);
}
else if (choice == 'u')
{
fscanf(usr," %d/%d/%d %s %s %s %s %s %d %s\n ",&add.month,&add.day,&add.year,add.name,choice,add.user.username,add.password,add.email,&add.number);
fprintf(usr," %d/%d/%d %s %s %s %s %s %d %s\n",&add.month,&add.day,&add.year,add.name,choice,add.user.username,add.password,add.email,&add.number);
fclose(usr);
}
else
{
goto personnel;
}

Answer 1

Tries to change the opening mode of the file. Instead of 'a+' puts 'a' if you only want to write in the file, or 'r' if you only want to read, or 'w+' if you want to read and write.

Answer 2

The opening mode 'a+'instead of setting the cursor at the beginning of the file sets it at the end.