{"id":146759,"date":"2025-09-03T16:49:11","date_gmt":"2025-09-03T11:19:11","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=146759"},"modified":"2025-09-03T16:49:11","modified_gmt":"2025-09-03T11:19:11","slug":"bank-management-system-using-file-in-cpp-part-2","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/bank-management-system-using-file-in-cpp-part-2\/","title":{"rendered":"C++ Project \u2013 Bank Management System using File Part \u2013 2"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">\/\/Object Oriented Based Banking System with File Storage\r\n\r\n#include &lt;iostream&gt;\r\n#include &lt;fstream&gt;\r\n#include &lt;string&gt;\r\nusing namespace std;\r\n\r\nclass BankAccount \r\n{\r\nprivate:\r\n    int accNo;  \/\/ Account number (unique ID)\r\n    string name; \/\/ Account holder's name\r\n    double balance; \/\/ Current balance in the account\r\n\r\npublic:\r\n    BankAccount() \r\n    {\r\n        accNo = 0;\r\n        balance = 0.0;\r\n    }\r\n\r\n    void createAccount() \r\n    {\r\n        cout &lt;&lt; \"\\nEnter Account Number: \";\r\n        cin &gt;&gt; accNo;\r\n        cin.ignore(); \/\/ flush newline\r\n        cout &lt;&lt; \"Enter Account Holder Name: \";\r\n        getline(cin, name);\r\n        cout &lt;&lt; \"Enter Initial Balance: \";\r\n        cin &gt;&gt; balance;\r\n    }\r\n\r\n    void display() \r\n    {\r\n        cout &lt;&lt; \"\\nAccount No: \" &lt;&lt; accNo;\r\n        cout &lt;&lt; \"\\nName: \" &lt;&lt; name;\r\n        cout &lt;&lt; \"\\nBalance: \" &lt;&lt; balance &lt;&lt; endl;\r\n    }\r\n\r\n    void deposit(double amt) \r\n    {\r\n        balance += amt;\r\n    }\r\n\r\n    void withdraw(double amt) \r\n    {\r\n        if (amt &gt; balance)\r\n            cout &lt;&lt; \"\\n Insufficient Balance!\\n\";\r\n        else\r\n            balance -= amt;\r\n    }\r\n\r\n    int getAccNo() const \r\n    {\r\n        return accNo;\r\n    }\r\n\r\n    void writeToFile() \r\n    {\r\n        ofstream fout(\"bank_accounts_new.dat\", ios::binary | ios::app);\r\n        fout.write((char*)this, sizeof(*this));\r\n        fout.close();\r\n        cout &lt;&lt; \"\\n Account created and saved to file.\\n\";\r\n    }\r\n\r\n    static void updateInFile(int acc, double amt, bool isDeposit) \r\n    {\r\n        BankAccount temp;\r\n        fstream file(\"bank_accounts_new.dat\", ios::binary | ios::in | ios::out);\r\n        bool found = false;\r\n\r\n        while (file.read((char*)&amp;temp, sizeof(temp))) {\r\n            if (temp.getAccNo() == acc) {\r\n                found = true;\r\n                if (isDeposit) {\r\n                    temp.deposit(amt);\r\n                    cout &lt;&lt; \"\\n Deposit successful.\\n\";\r\n                } else {\r\n                    temp.withdraw(amt);\r\n                    cout &lt;&lt; \"\\n Withdrawal processed.\\n\";\r\n                }\r\n\r\n                int pos = -1 * (int)sizeof(temp);\r\n                file.seekp(pos, ios::cur); \/\/ move back to the record's position\r\n                file.write((char*)&amp;temp, sizeof(temp));\r\n                break;\r\n            }\r\n        }\r\n\r\n        file.close();\r\n\r\n        if (!found)\r\n            cout &lt;&lt; \"\\n Account not found.\\n\";\r\n    }\r\n\r\n    static void showAccount(int acc) {\r\n        BankAccount temp;\r\n        ifstream fin(\"bank_accounts_new.dat\", ios::binary);\r\n        bool found = false;\r\n\r\n        while (fin.read((char*)&amp;temp, sizeof(temp))) {\r\n            if (temp.getAccNo() == acc) {\r\n                temp.display();\r\n                found = true;\r\n                break;\r\n            }\r\n        }\r\n\r\n        fin.close();\r\n        if (!found)\r\n            cout &lt;&lt; \"\\n Account not found.\\n\";\r\n    }\r\n};\r\n\r\nint main()\r\n {\r\n    int choice, accNo;\r\n    double amount;\r\n\r\n    do {\r\n        cout &lt;&lt; \"\\n\\n---------------SBI BANK MENU ---------------\";\r\n        cout &lt;&lt; \"\\n1. Create Account\";\r\n        cout &lt;&lt; \"\\n2. Deposit Amount\";\r\n        cout &lt;&lt; \"\\n3. Withdraw Amount\";\r\n        cout &lt;&lt; \"\\n4. Display Account Info\";\r\n        cout &lt;&lt; \"\\n5. Exit\";\r\n        cout &lt;&lt; \"\\n-----------------------------------------------------\";\r\n        cout &lt;&lt; \"\\nEnter your choice: \";\r\n        cin &gt;&gt; choice;\r\n\r\n        switch (choice) \r\n        {\r\n        case 1: \r\n        {\r\n            BankAccount acc;\r\n            acc.createAccount();\r\n            acc.writeToFile();\r\n            break;\r\n        }\r\n\r\n        case 2:\r\n            cout &lt;&lt; \"\\nEnter Account Number: \";\r\n            cin &gt;&gt; accNo;\r\n            cout &lt;&lt; \"Enter Amount to Deposit: \";\r\n            cin &gt;&gt; amount;\r\n            BankAccount::updateInFile(accNo, amount, true);\r\n            break;\r\n\r\n        case 3:\r\n            cout &lt;&lt; \"\\nEnter Account Number: \";\r\n            cin &gt;&gt; accNo;\r\n            cout &lt;&lt; \"Enter Amount to Withdraw: \";\r\n            cin &gt;&gt; amount;\r\n            BankAccount::updateInFile(accNo, amount, false);\r\n            break;\r\n\r\n        case 4:\r\n            cout &lt;&lt; \"\\nEnter Account Number: \";\r\n            cin &gt;&gt; accNo;\r\n            BankAccount::showAccount(accNo);\r\n            break;\r\n\r\n        case 5:\r\n            cout &lt;&lt; \"\\nThank you for using SBI Bank!\\n\";\r\n            break;\r\n\r\n        default:\r\n            cout &lt;&lt; \"\\n Invalid choice. Try again.\\n\";\r\n        }\r\n\r\n    } while (choice != 5);\r\n\r\n    return 0;\r\n}<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 \/\/Object Oriented Based Banking System with File Storage #include &lt;iostream&gt; #include &lt;fstream&gt; #include &lt;string&gt; using namespace std; class BankAccount { private: int accNo; \/\/ Account number (unique ID) string name; \/\/ Account&#46;&#46;&#46;<\/p>\n","protected":false},"author":581,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20172],"tags":[29649,35157,35180,35160,35179,28585,2263,29219,29218,35159],"class_list":["post-146759","post","type-post","status-publish","format-standard","hentry","category-cpp","tag-bank-management-system","tag-bank-management-system-in-c","tag-bank-management-system-using-c","tag-bank-management-system-using-file","tag-bank-management-system-using-file-in-c","tag-c-tutorial","tag-c","tag-c-practical","tag-c-program","tag-c-program-on-bank-management-system"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>C++ Project \u2013 Bank Management System using File Part \u2013 2 - DataFlair<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/data-flair.training\/blogs\/bank-management-system-using-file-in-cpp-part-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ Project \u2013 Bank Management System using File Part \u2013 2 - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 \/\/Object Oriented Based Banking System with File Storage #include &lt;iostream&gt; 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