c++

[crysty456]

se pricepe cnv la c++,daca da am nevoie si eu de putin ajutor daca nu asta este.....

am nevoie de: o clasa la alegere, sa se defineasca: constructor de clasa, constructor de copiere, destructor, supraincarcari pentru operatorul de atribuire si operatorii de intrare si iesire si alti 5 operatori la alegere. Sa se exemplifice utilizarea in main().

sper sa fie cnv cu programarea pe aici

[PuPuu]

#include <cstdio>
#include <iostream>
#include <cstdlib>

using namespace std;

class Rational {
private:
int numarator, numitor;
public:
Rational(int, int);
Rational(const Rational &);
~Rational();
int getNumarator() const;
int getNumitor () const;
void setNumarator(int);
void setNumitor(int);
void simplify();
Rational operator =(const Rational &);
Rational operator +=(const Rational &);
Rational operator -=(const Rational &);
Rational operator *=(const Rational &);
Rational operator /=(const Rational &);
};

bool egale(const Rational &, const Rational &);
int cmmdc(int, int);
int abs(int);
Rational operator +(const Rational &, const Rational &);
Rational operator -(const Rational &);
Rational operator -(const Rational &, const Rational &);
Rational operator *(const Rational &, const Rational &);
Rational operator /(const Rational &, const Rational &);
bool operator ==(const Rational &, const Rational &);
ostream& operator <<(ostream &, const Rational &);

Rational::Rational(int numarator = 0, int numitor = 1)
: numarator(numarator), numitor(numitor) {
this->simplify();
}
Rational::~Rational() {
}
int Rational::getNumarator() const {
return numarator;
}
int Rational::getNumitor() const {
return numitor;
}
void Rational::setNumarator(int numarator) {
this->numarator = numarator;
}
void Rational::setNumitor(int numitor) {
this->numitor = numitor;
}

void Rational::simplify() {
int d = cmmdc(abs(this->getNumarator()), abs(this->getNumitor()));
if(d == 0)
this->setNumitor(1);
else {
this->setNumarator(this->getNumarator() / d);
this->setNumitor(this->getNumitor() / d);
}

// daca fractia e negativa atunci semnul - il pun la numarator
if(this->getNumarator() >= 0 && this->getNumitor() < 0) {
this->setNumarator(-this->getNumarator());
this->setNumitor(-this->getNumitor());
}
}

int abs(int a) {
return a > 0 ? a : -a;
}

int cmmdc(int a, int b) {
int r = a % b;
while(r) {
a = b;
b = r;
r = a % b;
}
return b;
}

Rational::Rational(const Rational &r) {
numarator = r.numarator;
numitor = r.numitor;
}

Rational operator +(const Rational &a, const Rational &b) {
Rational suma;
int ampl_a, ampl_b, cmmmc;

ampl_a = ampl_b = 1;
cmmmc = a.getNumitor();

// aduc la acelasi numitor
if(a.getNumitor() != b.getNumitor()) {
cmmmc = (a.getNumitor() * b.getNumitor()) / cmmdc(a.getNumitor(), b.getNumitor());
ampl_a = cmmmc / a.getNumitor();
ampl_b = cmmmc / b.getNumitor();
}

suma.setNumitor(cmmmc);
suma.setNumarator(a.getNumarator() * ampl_a + b.getNumarator() * ampl_b);
suma.simplify();

return suma;
}

Rational operator -(const Rational &a) {
// varianta unara
return Rational(-a.getNumarator(), a.getNumitor());
}

Rational operator -(const Rational &a, const Rational &b) {
// varianta binara
// a - b = a + (-b)
return a + (-b);
}

Rational operator *(const Rational &a, const Rational &b) {
return Rational(a.getNumarator() * b.getNumarator(), a.getNumitor() * b.getNumitor());
}

Rational operator /(const Rational &a, const Rational &b) {
// a / b = a * (1 / b)
Rational b_invers(b.getNumitor(), b.getNumarator());
Rational rezultat(a * b_invers);
rezultat.simplify();
return rezultat;
}

Rational Rational:perator =(const Rational &a) {
this->setNumarator(a.getNumarator());
this->setNumitor(a.getNumitor());
return *this;
}

Rational Rational:perator +=(const Rational &a) {
return *this = *this + a;
}

Rational Rational:perator -=(const Rational &a) {
return *this = *this - a;
}
Rational Rational:perator *=(const Rational &a) {
return *this = *this * a;
}
Rational Rational:perator /=(const Rational &a) {
return *this = *this / a;
}

bool operator ==(const Rational &a, const Rational &b) {
// produsul mezilor = produsul extremilor
if(a.getNumarator() * b.getNumitor() == a.getNumitor() * b.getNumarator()) return true;
return false;
}

ostream& operator <<(ostream& out, const Rational &r) {
out << r.getNumarator() << " / " << r.getNumitor() << endl;
return out;
}

istream& operator >>(istream& in, Rational &r) {
int x, y;
cout << "Introduceti numaratorul: ";
in >> x;
cout << "Introduceti numitorul: ";
in >> y;
r.setNumarator(x);
r.setNumitor(y);
r.simplify();
return in;
}

int main(int argc, char* argv[])
{
Rational a(3, -4), b(3, 6);
cout << "a = "; cout << a;
cout << "b = "; cout << b;

cout << "a + b = "; cout << (a + b);

cout << "a - b = "; cout << (a - b);

cout << "a * b = "; cout << (a * b);

cout << "a / b = "; cout << (a / b);

cout << "Relatia a / b = 1 / (b / a) este ";
if(a / b == 1 / (b / a))
cout << "adevarata.";
else
cout << "falsa.";
cout << endl;

Rational c;
c = a;
cout << "c = "; cout << c;

c += a;
cout << "c = "; cout << c;

c /= (-3);
cout << "c = "; cout << c;

Rational d;
cin >> d;

cout << d;

system("pause");
return 0;
}





;x

[boory]

si eu care tremin cls a 10-a la mate-info intensiv info ma consideram un geniu al informaticii =)).....dar cand am vazut asta era sa fac infart =)))

[BlacKyy]

eu termin a 11a si tot e prea avansata ptr mn....abea acum am inceput sa invat "clasele" alea....da se termina scoala...deci la anu.....

[Simplicity]

si eu care tremin cls a 10-a la mate-info intensiv info ma consideram un geniu al informaticii =)).....dar cand am vazut asta era sa fac infart =)))

Pentru ca ce se invata la noi in licee este o struto-camila de C cu C++. Se invata object-based commands ( cout/cin ) in loc de scanf/printf, specifice limbajului C, dar in rest nu lucram cu clase si obiecte specifice limbajelor OOP. Bine, daca e sa o luam asa nici C++ nu este in totalitate un limbaj OOP.
In mare parte e okay, dar vezi *** il trimiti la scoala, ca unele lucruri nu te invata sa le faci asa.

[PuPuu]

*** adica in mare parte e okay lol..............