Question

i have the indicated problem with the following code and i have no idea what it might be causing it. I searched before posting the problem, and i learned that it might be something going out of the scope like a reference to a freed memory location but i could not find it on my own.
Thank you for helping me.

#include<iostream>
#include<string>
using namespace std;

class USR{
private:
    string name;
public:
    void setName(string name){  
        this->name = name;
    }
    string getName(){
        return name;
    }

};

class A{
private:
    USR* * a;
public:
    A(int size){
        a = new USR*[size];
    }   
    USR* getUser(){
        return a[0];
    }
};

int main(){
    A test = A(5);
    USR* u = test.getUser(); 
    (*u).setName("test");
    USR* u2 = test.getUser(); 
    cout << (*u2).getName() << endl;
    cout << (*u).getName() << endl;
}

Answer 1

Your method getUser returns an uninitialized pointer (the constructor of A creates an array of uninitialized pointers). The error you see is the result of dereferencing the uninitialized pointer that method returned.