C++ “error: passing 'const std::map >' as 'this' argument of …”

Question

With the following code (excerpted for brevity):

color.h:

class color {
public:
    color();

    enum colorType {
        black, blue, green, cyan,          


        

Answer 1

First : the map map colors must be a map from cColorType to string instead of int :

map colors

Second : As some people already answered : map::operator[]() is not const. The reason for that is that this operator returns a reference, which allows you to modify its value.

Let me suggest the following solution : You can create a second private attribute : the color in string format. Therefore you'll have 2 Get functions (one for each type of color), and one Set function (which will modify the 2 color attributes).