Question

I wish to define an array in a class, and set the variables of the class to the elements of the array. The implementation below results in segmentation fault:

class Grade {
    char MAP[];
    char *letter;
public:
    Grade();
    ~Grade();
    void set(int);
};
 Grade::Grade(){
    letter = new char;
    *letter = '\0';

    MAP[0] = 'A';
    MAP[1] = 'B';
    MAP[2] = 'C'; // result in segmentation fault

    MAP = { 'A', 'B', 'C'}; // result in segmentation fault
    }

Grade::~Grade(){
    delete letter;
    delete percent;
}

void Grade::set(int a){
    *letter = MAP[a];
}

How should I fix it?

Answer 1

Quickest way is to change char MAP[]; to char MAP[3];

There are other interesting things in the code.

1) It does not compile as given (you never define what a percent is).
2) What happens if someone sends an “int a” to your set function that is outside of the range of your map? (IE: 56 instead of 0, 1, or 2)?