If the query fails, an error message will appear. All Items Module – I got all things from the items table and displayed them in a table in this module.After adding a new item to the sold database, the Canteen Management System C++ application will conduct an update query to update the amount of the item in the items table. I used stringstream to convert string to integer and integer to string in this function. Add New Sale Module – I gave two parameters to this function: the name and quantity of the item placed in the canteen.This Canteen Management System application will display a success message if the insertion query is successful, and an error message if it is not. Then use mysql query(), which is a built-in function. Add New Item Module – I used the user’s input for the name and quantity and combined it with an insert query string.Features of Canteen Management System Project in C++ and MySQL The if statement displays if the connection was successful or not.(The MySQL server should be open while connecting) mysql_real_connect’s initializer is mysql_init real connect establishes a connection to the database.The database connection is stored in this class.The Class Use in Canteen Management System Project in C++ and MySQL Database res is used to retrieve all of the database’s values.row is used to retrieve the database’s current row.The query’s state is represented by qstate.Global variables use in Canteen Management System Project in C++ and MySQL Database
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