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= Contents =
- [[#C++ Examples|C++ Examples]]
- [[#C++ Examples#Friend operator|Friend operator]]
- [[#C++ Examples#Time Header|Time Header]]
= C++ Examples =
== Friend operator ==
{{{c++
#include <iostream>
class T {
int x;
public:
T (int x);
friend std::ostream& operator<<(std::ostream&, const T&);
};
T::T (int x) {
this->x = x;
}
std::ostream& operator<<(std::ostream& out, const T& t) {
out << "T {" << t.x << "}";
return out;
}
int main () {
T t(10);
std::cout << t << std::endl;
}
}}}
== Time Header ==
{{{c++
#pragma once
#include <ostream>
enum timetype {
_day, _hour, _minute, _second
};
class Time {
private:
int _days = 0;
int _hours = 0;
int _minutes = 0;
int _seconds = 0;
public:
Time() { };
Time(int n, timetype type);
int to_seconds() const;
friend std::ostream& operator<<(std::ostream&, const Time&);
friend Time operator * (int, Time);
Time operator + (const Time&);
Time operator , (const Time& t) { return *this + t; }
Time operator && (const Time& t) { return *this + t; }
};
#define days * Time(1, _day)
#define day days
#define hours * Time(1, _hour)
#define hour hours
#define minutes * Time(1, _minute)
#define minute minutes
#define seconds * Time(1, _second)
#define second seconds
int main() {
std::cout
<< 5 days << std::endl
<< 7 minutes << std::endl
<< (5 days and 3 seconds) << std::endl
<< (7 days, 7 minutes and 3 seconds) << std::endl
<< (9 hours and 1 second) << std::endl
;
}
}}}
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