what is current capability of our banking system program / what we achived so far

1. Program can add accounts and their details. It can store all the informaiton in binary format.
2. It can perform transactions and print the net balance for the selected customer. And also inform about the account status.
3. It can search the any customer based on their customer

I want to create function which will assign the random name, random account number of 6 digit, random adress ,...so oon. basically instead of asking the details of customer. The random function will create random details. But account ID is not random, the account ID will be in acesending order starting with 1 and going up to total number of customer. Because we serach customer from his accouont ID. In simple words, when we run this random function for 100 customer, the first customer should have account ID 1 and last should have 100. So it is pretty ordered In C langauge

I have the code already but I can't paste it because it's too long, please check the link below.

The code that i am attaching has already this function.

void input(); // Input the data of customer

void writefile(); // Write the data to file

void print_all(); // Print the data of custoomer

void add_accounts(); // add data of customer a

void search_customer(); // Search data of customer in the stored file

void last_transactions(); //print the last transaction

void print_balance(); // Print the balance of customer

void make_transaction(); // Add or remove money to account

void check_account_status(int n); // Check the account status if it has enough money

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