Clock P45616

Using the definition

    struct Clock {
        int h;      // hours    (0<=h<24)
        int m;      // minutes   (0<=m<60)
        int s;      // seconds   (0<=s<60)
    };

implement the following functions and procedures:

    Clock midnight();
    void increase(Clock& r);
    void print(const Clock& r);

the function @midnight()@ returns a clock initialized to midnight (00:00:00). The procedure @increase()@ increases the clock a second. The procedure @print()@ prints the time of the clock in the format @HH:MM:SS@ in a line.

Observation

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

Strictly obey the type definitions of the statement.