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Error: invalid initialization of reference of type

By : Orhan Çelik
Date : August 01 2020, 09:00 PM
Any of those help So I have classes Sensor, Car, and Agency where class Agency takes in class Car, and class Car takes in class Sensor. In my source file for class Agency I have an error for my operator[]`\ function and that says , The problem is your return type. Look at the function protoype:
code :
Agency &Agency::operator[](int index);
Car *invtptr = this->m_inventory;
return *invtptr;
Car& Agency::operator[](int index);

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Invalid initialization of reference of type error

By : user3079546
Date : March 29 2020, 07:55 AM
wish helps you A million thanks to anyone, who is willing to help me with this. , First your compile-error:
code :
vector<vector<int> > mat;
if (VanNemNull(&mat[i])) cout<<"szupiiiiii";
if (VanNemNull(mat)) ...
 bool VanNemNull (const vector<int> > mat);
void Beolvas(vector<vector<int> > mat );

error: invalid initialization of non-const reference of type ‘int&’ from an rvalue of type ‘int’

By : csho
Date : March 29 2020, 07:55 AM
will help you C++03 3.10/1 says: "Every expression is either an lvalue or an rvalue." It's important to remember that lvalueness versus rvalueness is a property of expressions, not of objects.
Lvalues name objects that persist beyond a single expression. For example, obj , *ptr , ptr[index] , and ++x are all lvalues.
code :
 &obj; //  valid
 &12;  //invalid

error: invalid initialization of non-const reference of type...from a temporary of type

By : j sndrs
Date : March 29 2020, 07:55 AM
wish helps you If the function takes a reference, you should pass database, not &database The latter is the address of database, so it's a pointer, not a reference.

error: invalid initialization of reference of type ‘LineLayer&’ from expression of type ‘Layer’

By : user2202078
Date : March 29 2020, 07:55 AM
This might help you It can be done, but not implicitly. This is to protect you from undesired conversions, since not every Layer is a LineLayer. To perform this conversion when you're sure that it's valid, use a static_cast:
code :
LineLayer& lastLayer = static_cast<LineLayer&>(*this->layers.back());
LineLayer& lastLayer = dynamic_cast<LineLayer&>(*this->layers.back());

Why I get this error "invalid initialization of non-const reference of type 'A&' from an rvalue of type 'A'&quo

By : user1391861
Date : March 29 2020, 07:55 AM
To fix this issue Given the following code:
code :
A operator+(const A& a1, const A& a2)
A& sum = a1 + a1;
A sum = a1 + a1;
A const& sum = a1 + a1;
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