C std::string attribute of a class comes up as an empty string after initialized-CodePudding

So i have a pretty straight foward homework that consist in creating a student class that has a name and 3 grades as attributes and a method to caluculate the final grade and append the name as long as the final grade to 2 vectors respectively, the problem comes up when i try to append the name to the vector as its appended as an empty string, but the debugger shows the instance of that student class (the "Alumno" class) has actually a name.

i'll leave you the code below,

class libroDeClases {
public:
    vector<string> nombres;
    vector<float> notasDef;
};

class Alumno {
private:
    string nombre;
    float n1, n2, n3;
    float notaDef;

public:
    Alumno(string nombre, float x, float y, float z) {
        nombre = nombre;
        n1 = x;
        n2 = y;
        n3 = z;    }
    void calcularNota(libroDeClases L) {
        float nd = (n1   n2   n3) / 3;
        notaDef = nd;
        L.notasDef.push_back(nd);
        L.nombres.push_back(nombre);
    } 

int main() {
    libroDeClases Libro;
    Alumno a1("Oscar", 4.0, 4.7, 5.5);
    a1.calcularNota(Libro);

thank you for your help!

Edit: i added the "Libro" class in order to make the code compile, i forgot to provide it sorry about that.

CodePudding user response：

As the user Taekahn said in a comment, i used This -> and it now appends it perfectly.

Thank you.

CodePudding user response：

If you pass the object by reference to calcularNota then the string gets printed successfully. If you just pass by value, a copy of the object gets made but doesn't change the value of the original object: https://godbolt.org/z/fGzWvzW1b