Im not getting the expected result

[sauerplayer]

Are you talking about the code in Factura:rocesar()?
Why would you expect that to hold a sum?
You are setting the variable to 0 on every call.

Cheers,
_

so If I modify this code will it work?

void Factura::procesar( int cantidad, int precio ){
 
        costoFinal = cantidad * precio;
 
        precioFinal += costoFinal;
 
    }

void Factura::procesar( int cantidad, int precio ){
 
        costoFinal = cantidad * precio;
 
        precioFinal += costoFinal;
 
    }

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[anda_skoa]

so If I modify this code will it work?

You are not serioulsy asking that instead of trying it, right?

Cheers,
_

[sauerplayer]

You are not serioulsy asking that instead of trying it, right?

Cheers,
_

I found the and fixed the problem, now it works correctly, the problem was that I did not initialize PrecioFinal before using it, but it had to be done inside the constructor...

Factura::Factura(){

precioFinal = 0;

establecerDatos( numeroDePieza = "", descripcionDePieza = "", cantidadDeArticulos = 0, precioDeArticulo = 0 );
}

still I do not undesrtand why, if I try to initialize precioFinal to 0 inside Factura.h it fails to do so...

the error message I get for this is : C:\Users\eyel\Desktop\CBlocks\Clase9\Factura.h|30|warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11|

[anda_skoa]

still I do not undesrtand why, if I try to initialize precioFinal to 0 inside Factura.h it fails to do so...

the error message I get for this is : C:\Users\eyel\Desktop\CBlocks\Clase9\Factura.h|30|warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11|

As the compiler hints that is available from the C++11 standard onwards.
If you are building for an older standard then you need to use assignment in code or the constructor's initialization list.

Cheers,
_