Question

Complete the definitions for the following prototypes in the Time class:

Time(std::string) – a constructor that will take in a string with the format h:m:s and parse the

h, m and s into separate int values that can be used to set the time of a new time object.

int getSecond() const - return the value of the second void setSecond() - set the value of the second, making sure the new second value is valid before changing it.

std::string to24format() - return a string with the time in the format hh:mm:ss

Starting point for lab 3: https://repl.it/@jholst/Time-class-lab-3-starting-point

Answer 1

Code

Time.h

#include <string>

#ifndef TIME_H
#define TIME_H

class Time{

public:
  
// constructors
Time (int = 0, int = 0, int = 0);
Time (std::string); // lab 3 define

// set functions
void setTime(int, int, int);

// get functions
int getHour() const;
int getMinute() const;
int getSecond() const; // lab 3 define

// display functions
std::string to24format() const; // lab 3 define
std::string toAMPMformat() const;

private:

// data members
int hour;
int minute;
int second;

// private helper functions
void setHour(int);
void setMinute(int);
void setSecond(int); // lab 3 define
};

#endif

Time.cpp

#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>
#include "Time.h"

// constructor to take three int values
Time::Time(int hour, int minute, int second){
setTime(hour, minute, second);
}
Time::Time(std::string time)

{
   std::string temp;
   size_t found = time.find(":");
   temp=time.substr(0,found);
   setHour(stoi(temp));

   time=time.substr(found+1);

   found = time.find(":");
   temp=time.substr(0,found);

   setMinute(stoi(temp));

   time=time.substr(found+1);

   setSecond(stoi(time));

}
void Time::setTime(int h, int m, int s){
setHour(h);
setMinute(m);
setSecond(s);
}

void Time::setHour(int h){
if (h >= 0 && h < 24){
hour = h;
}
else{
std::cout << "\nInvalid hour value " << h << "\n";
}
}

void Time::setMinute(int m){
if (m >= 0 && m < 60){
minute = m;
}
else{
std::cout << "\nInvalid minute value " << m << "\n";
}
}
void Time::setSecond(int s)
{
   if (s >= 0 && s < 60){
second = s;
}
else{
std::cout << "\nInvalid minute value " << s << "\n";
}
}
int Time::getHour() const {
return hour;
}

int Time::getMinute() const {
return minute;
}
int Time::getSecond() const
{
   return second;
}
std::string Time::to24format() const
{
   std::ostringstream output;

output << std::setfill('0') << std::setw(2)
<< ((hour == 0 || hour == 12) ? 12 : hour)
<< ":" << std::setw(2) << minute
<< ":" << std::setw(2) << second ;

return output.str();
}
std::string Time::toAMPMformat() const{
std::ostringstream output;

output << std::setfill('0') << std::setw(2)
<< ((hour == 0 || hour == 12) ? 12 : hour % 12)
<< ":" << std::setw(2) << minute
<< ":" << std::setw(2) << second
<< (hour < 12 ? " AM" : " PM");
  
return output.str();

}

Main.cpp

#include <iostream>
#include <sstream>
#include "Time.h"
using namespace std;

void displayTime(const string & message, const Time * time){
cout << message << "\n24 Hour clock: " << time->to24format() << "\nAM/PM format: " << time->toAMPMformat() << "\n\n";
}

int main() {
  
Time time1;
Time time2(11);
Time time3(22, 30);
Time time4(7, 45, 30);

displayTime("Time 1", &time1);
displayTime("Time 2", &time2);
displayTime("Time 3", &time3);
displayTime("Time 4", &time4);

string rawinput;
cout << "Enter time h:m:s = ";
getline(cin, rawinput);
istringstream inputTime(rawinput);
int hour, minute, second;
char c;
inputTime >> hour >> c >> minute >> c >> second;
  
Time newTime(hour, minute, second);
displayTime("New time", &newTime);

// lab 3 addition of constructor taking string
Time newStringTime("5:30:15"); // use new constructor
displayTime("New string time", &newStringTime);

}

output

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