Students X69617

Using the definition

    struct Student {
        int idn;
        string name;
        double mark;        // The mark is a value between 0 and 10, or -1 that represents NP
        bool repeater;
    };

implement the procedure

    void information(const vector<Student>& stu, double& min, double& max, double& avg)

that computes the minimal mark (|min|), the maximal mark (|max|) and the average mark (|avg|) of all the students of the table stu that have taken the examn and that are not repeaters. If there is not any student that has these requirements, the value of these parameters must be $-1$.

Observation

You only need to submit the required classes; your main program will be ignored.

Strictly obey the type definitions of the statement.