Thread: Storing structure data in txt file instead of dat file?

hello friends,

I am new to C

recently i have been studying code of bank management system

where i see the input files are stored in .dat files

but i just wonder can i store these structure data in plain .txt file ? if so how?

here is the code of the function

Code:

void new_acc()

{
    int choice;
    FILE *ptr;


    ptr=fopen("record.dat","a+");
    account_no:
    system("cls");
    printf("\t\t\t\xB2\xB2\xB2\ ADD RECORD  \xB2\xB2\xB2\xB2");
    printf("\n\n\nEnter today's date(mm/dd/yyyy):");
    scanf("%d/%d/%d",&add.deposit.month,&add.deposit.day,&add.deposit.year);
    printf("\nEnter the account number:");
    scanf("%d",&check.acc_no);
    while(fscanf(ptr,"%d %s %d/%d/%d %d %s %s %lf %s %f %d/%d/%d\n",&add.acc_no,add.name,&add.dob.month,&add.dob.day,&add.dob.year,&add.age,add.address,add.citizenship,&add.phone,add.acc_type,&add.amt,&add.deposit.month,&add.deposit.day,&add.deposit.year)!=EOF)
    {
        if (check.acc_no==add.acc_no)
            {printf("Account no. already in use!");
            fordelay(1000000000);
                goto account_no;


            }
    }
    add.acc_no=check.acc_no;
        printf("\nEnter the name:");
    scanf("%s",add.name);
    printf("\nEnter the date of birth(mm/dd/yyyy):");
    scanf("%d/%d/%d",&add.dob.month,&add.dob.day,&add.dob.year);
    printf("\nEnter the age:");
    scanf("%d",&add.age);
    printf("\nEnter the address:");
    scanf("%s",add.address);
    printf("\nEnter the citizenship number:");
    scanf("%s",add.citizenship);
    printf("\nEnter the phone number: ");
    scanf("%lf",&add.phone);
    printf("\nEnter the amount to deposit:$");
    scanf("%f",&add.amt);
    printf("\nType of account:\n\t#Saving\n\t#Current\n\t#Fixed1(for 1 year)\n\t#Fixed2(for 2 years)\n\t#Fixed3(for 3 years)\n\n\tEnter your choice:");
    scanf("%s",add.acc_type);


        fprintf(ptr,"%d %s %d/%d/%d %d %s %s %lf %s %f %d/%d/%d\n",add.acc_no,add.name,add.dob.month,add.dob.day,add.dob.year,add.age,add.address,add.citizenship,add.phone,add.acc_type,add.amt,add.deposit.month,add.deposit.day,add.deposit.year);




    fclose(ptr);
    printf("\nAccount created successfully!");
    add_invalid:
    printf("\n\n\n\t\tEnter 1 to go to the main menu and 0 to exit:");
    scanf("%d",&main_exit);
    system("cls");
    if (main_exit==1)
        menu();
    else if(main_exit==0)
            close();
    else
        {
            printf("\nInvalid!\a");
            goto add_invalid;
        }
}

i tried this

Code:

ptr =fopen("record.txt","a");

instead of

Code:

 ptr=fopen("record.dat","a+");

ok that works..but what if i need to style how should text show in tabular form ?

right now everything shows in single line text..



and what is the use of storing in .dat files?

but i just wonder can i store these structure data in plain .txt file ? if so how?

The easiest way is to use sscanf into a char array, and then fputs - That way you can reuse a lot of that code.

Your scanf's from the file will also need to change, because you are now reading strings, not numbers.



However, there are a lot of practices that are bad in the code you are learning from, and a few errors.

From here

Using goto instead of using regular loops
Using exclusively global variables


And a few errors such as...

Code:

else if (choice==2)
    {   printf("Enter the name:");
        scanf("%s",&check.name);

... Should be ...
else if (choice==2)
    {   printf("Enter the name:");
        scanf("%s",check.name);    //check.name is already the address, does not need '&'

strcmpi will only work on older Windows machines... You can write your own using strcmp and toupper/tolower in ctype.h

'close()' has no prototype

When dealing with time there is a time.h header file that would be much better than asking the user for the date/time...

Code:

while (fscanf(old,"%d %s %d/%d/%d %d %s %s %lf %s %f %d/%d/%d",&add.acc_no,add.name,&add.dob.month,&add.dob.day,&add.dob.year,&add.age,add.address,add.citizenship,&add.phone,add.acc_type,&add.amt,&add.deposit.month,&add.deposit.day,&add.deposit.year)!=EOF)

This function returns the number of input items successfully matched and assigned, not EOF.