oop

[Solved] php bind_param number of variables doesn’t match number of parameters

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You get the error because you bind 7 params to the query, but don’t use any of them. Instead you insert the variables directly into the query, which leads to the data being (insecurely) inserted into the database. $insert = $this->con->db->prepare(‘UPDATE users SET firstName=”‘.$updateFirstName.'”, lastName=”‘.$updateLastName.'”, username=”‘.$updateUsername.'”, email=”‘.$updateEmail.'”, profileImage=”‘.$updateProfileImage.'”, bio=”‘.$updateBio.'” WHERE userID = ‘.$userID); should be … Read more

[Solved] I dont understand error “definition of implicity-declared ‘Clothing::Clothing()’

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The error is: you declared a destructor but you didn’t define it. Add a definition for the destructor or define it as default: #ifndef CLOTHING_H_ #define CLOTHING_H_ #include <string> #include <iostream> using namespace std; class Clothing { private: int gender; int size; string name; public: Clothing(); Clothing(const Clothing &t); Clothing(int gender, int size, string name); … Read more

[Solved] Error in the exercise of oop [closed]

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It is because there is no constructor in the Conta class. Because, in the child class ContaPoupanca, you called the constructor of the parent class which is Conta like this: parent::__construct($Agencia, $Codigo, $DataCriacao, $Titular, $Senha, $Saldo); Therefore, to make this work, the parent class Conta should have a constructor like this: public function __construct($Agencia, $Codigo, … Read more

[Solved] Why in OOP you do everything in objects? [closed]

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You choose object-oriented programming when encapsulating data and behavior into classes, whose instances, maps well onto the problem you’re trying to solve. Not every problem is best done with objects. There are other styles of programming – functional and declarative come to mind – that are also good. Most of the scientific programming that I … Read more

[Solved] Function don’t work in the class (c++)

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Below is my attempt. There were some formatting issues but the trickiest problem was that getValue() is a const function. class Int { private: int num; public: Int() { num = 0; } Int(int n) { num = n; } // getValue is a const function as it does not alter object ‘n’. int getValue() … Read more

[Solved] How to capture value OOPS & Generic [closed]

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While looking at your code, why would one want to read class specific properties in a generic method? The only solutions i see is to use Reflection, or create an abstract base class with a before save method and call that method in de Save() method. Add a generic type constraint to the DBObject class … Read more

[Solved] What exaclty happens when a you call a constructor(new Class),do instance initializer blocks runs first? [closed]

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The constructor executes in the following order: Calls the constructor of the superclass. Runs the instance initializer blocks in the order they were defined. Executes the rest of the body of the constructor. I.e., both of your sysout statements execute just before the assignment n=10;. That’s how it should be. See JLS §12.5. 1 solved … Read more