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#include "Clock.h"
#include <iostream>
#define SHOW(...)\
(void)(std::cout << __FILE__ << ':' << __LINE__ << '\t'\
<< #__VA_ARGS__ << " --> " << (__VA_ARGS__)\
<< std::endl)
int main()
{
std::cout.setf(std::ios::boolalpha);
Clock c{}; SHOW(c);
c.TickUp(); SHOW(c);
c.TickUp(); SHOW(c);
c.TickUp(); SHOW(c);
c.Set(0, 0, 58);
c.TickUp(); SHOW(c);
c.TickUp(); SHOW(c);
c.TickUp(); SHOW(c);
c.TickUp(60); SHOW(c);
c.TickUp(60); SHOW(c);
Clock c2{23, 57, 58}; SHOW(c2);
c2.TickUp(60); SHOW(c2);
c2.TickUp(60); SHOW(c2);
c2.TickUp(); SHOW(c2);
c2.TickUp(); SHOW(c2);
c2.TickUp(); SHOW(c2);
}
#ifndef CLOCK_H
#define CLOCK_H
#include <iosfwd>
#include "Counter.h"
class Clock {
Counter hours_;
Counter minutes_;
Counter seconds_;
public:
Clock(int hours = 0, int minutes = 0, int seconds = 0)
: hours_{24}
, minutes_{60, &hours_}
, seconds_{60, &minutes_}
{
Set(hours, minutes, seconds);
}
Clock(const Clock&) =delete;
Clock& operator=(const Clock&) =delete;
void Set(int hours, int minutes, int seconds) {
hours_.SetValue(hours);
minutes_.SetValue(minutes);
seconds_.SetValue(seconds);
}
void TickUp(int seconds = 1) { seconds_.Count(seconds); }
friend std::ostream& operator<<(std::ostream&, const Clock&);
};
#endif
#include "Clock.h"
#include <iostream>
#include <iomanip>
std::ostream& operator<<(std::ostream& lhs, const Clock& rhs) {
std::ostream os{lhs.rdbuf()};
os.fill('0');
os << std::setw(2) << rhs.hours_.GetValue() << ':'
<< std::setw(2) << rhs.minutes_.GetValue() << ':'
<< std::setw(2) << rhs.seconds_.GetValue();
return lhs;
}
#ifndef COUNTER_H
#define COUNTER_H
class Counter {
private:
int value_{};
const int max_value_{};
Counter* next_counter_{};
public:
Counter() =delete;
Counter(const Counter&) =delete;
Counter& operator=(const Counter&) =delete;
Counter(int max_value, Counter* next_counter = nullptr)
: value_{0}
, max_value_{max_value}
, next_counter_{next_counter}
{}
void SetValue(int value) { value_ = value; }
int GetValue() const { return value_; }
void Count(int amount = 1);
void Reset();
};
#endif
#include "Counter.h"
void Counter::Count(int amount) {
while (amount-- > 0) {
if (++value_ >= max_value_) {
value_ = 0;
if (next_counter_) {
next_counter_->Count(1);
}
}
}
}
void Counter::Reset() {
value_ = 0;
}
Example of clock build from a helper class
==========================================
The overflow algorithm is separated into a class of its own.
Objects of this class can be chained via pointers. The last
in the chain holds a nnull pointer.
Compiling Program...
Standard Input:
Interactive Console
Text
Program is not being debugged. Click "Debug" button to start program in debug mode.
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