how to call parameterized constructor in derived class

[geetacplusprob]

class Time { public: int hh, mIn, ss; Time() { hh = mIn = SS = 0; } } ;
(a) [15%] Implement a class named "Event" that satisfies all of following requirements: i) The class has the following data members - id: An integer - name: A string that represents the name of the event - start, end: The starting and ending times ofthe event. We assume all events starts and ends in the same day.
ii) The class has two constructors a) A default constructorJa constructor with no parameters) that sets the data members to the following values: Data members Initial values Id 0
Name
"No name"
start, end
Both represent the time 00:00:00.

Here from the above part how to use start and end time with the base class construtor

Mine code is

#include<iostream>
#include<string.h>
using namespace std ;
 
 class Time {
 public:
 int hh, mm, ss;
 
 Time(){
 hh =mm =ss =0;
 }
// friend class Event;
Time :: Time(int h, int m, int s)
{
    hh=h;
    mm=m;
    ss=s;
}
 };
 
 
class Event : public Time
{
 
public:
    int id ;
    char name[10] ;
    float start ;
    float End;
 
 
    Event(){
        id = 0;
        strcpy(name, "Hi");
        start = 0.0 ;
        End = 0.0 ;
    }
 
//    Event();
    Event(int id1, char name1[],float start1, float end1){
        id = id1 ;
        strcpy(name,name1);
        start = start1 ;
        End = end1 ;
        cout<<id<<endl<<start<<endl<<name<<endl<<End<<endl ;
        //cout<<"Done"<<endl ;
    }
 
 
};
 
int main(){
 
    Event e ;
    Event(300, "hi",3.0 , 9.0) ;
        return 0 ;
}

[dev7060]

- Scope resolution operator is not required before parameterized constructor of class Time.

- Why is there a parameterized constructor for the Time class if it's not even being used?

- Provided text says, start & end: The starting and ending times of the event. Both represent the time in the format hh:mm:ss.

- It is quiet clear that any primitive data type can't hold a value in such format. However, it can kinda be stored in a character array but it'll then create issues in further calculations as the data type is not suitable for storing such values.

-User defined data type structure can be used in such case. The structures can be declared inside Time class like:

 struct s {
     int hh;
     int mm;
     int s;
 };
 struct e {
     int hh;
     int mm;
     int ss;
 };
 struct s start;
 struct e end;
 

-All the values can be initialized in constructor as:

...
 start.hh=h1;
 start.mm=m1;
 start.ss=s1;
 end.hh=h2;
 end.mm=m2;
 end.ss=s2;
...
 

where h1, m1, h2 etc. are formal arguments of constructor.

- These values can be initialized in default constructor as

 start.hh=start.mm=start.ss=end.hh=end.mm=end.ss=0;