העמסת אופרטורים ב ++C תרגיל 2 שאלה 1 סדנא ב++C
תכנית ראשית
#include <iostream>
#include <cstring>
#include "rational.h"
using namespace std;
int main()
{
cout << "enter two rational numbers" << endl;
int a, b, c, d; // a is the first mone, b is the first mechane, c is the second mone, d is the second mechane.
char g; // for the separator line ('/')
bool i;
// create 2 rational objects
cout<<"a:";cin >> a >> g >> b;
cout<<"b:";cin>> c >> g >> d;
if (b==0||d==0)
{
cout<<"ERROR\n";
}
Rational A(a,b), B(c,d);
cout<<"b-a: ";(B-A).print(); cout<<endl;
bool x=false;
x = (A!=B);
if (x)
{
cout<<"a!=b: true"<<endl;
}
else
{
cout<<"a!=b: false"<<endl;
}
x = (A<B);
if (x)
{
cout<<"a<b: true"<<endl;
}
else
{
cout<<"a<b: false"<<endl;
}
x = (A>B);
if (x)
{
cout<<"a>b: true"<<endl;
}
else
{
cout<<"a>b: false"<<endl;
}
x = (A>=B);
if (x)
{
cout<<"a>=b: true"<<endl;
}
else
{
cout<<"a>=b: false"<<endl;
}
cout<<"a++: "; A++.print(); cout<<endl;
cout<<"--a: "; (--A).print(); cout<<endl;
cout<<"a--: "; (A--).print(); cout<<endl;
B=A;
//cout<< "now A is:";A.print(); cout<<" now B is:"; B.print(); cout<<endl;
cout<<"b-a: ";(B-A).print(); cout<<endl;
cout<<"b/a: ";(B/A).print(); cout<<endl;
x = (A!=B);
if (x)
{
cout<<"a!=b: true"<<endl;
}
else
{
cout<<"a!=b: false"<<endl;
}
x = (A<B);
if (x)
{
cout<<"a<b: true"<<endl;
}
else
{
cout<<"a<b: false"<<endl;
}
x = (A>=B);
if (x)
{
cout<<"a>=b: true"<<endl;
}
else
{
cout<<"a>=b: false"<<endl;
}
// system("pause");
return 0;
}
מימוש פונקציות המחלקה
#include "rational.h"
#include <iostream>
using namespace std;
Rational::Rational(int x = 1, int y = 1)
{
if (y!=0)
{
this->d = x; this->n = y;
}
if (y==0)
{
this->d = x; this->n = 1;
}
}
Rational::Rational()
{
d = 1; n = 1;
}
void Rational::set_d(int c){ d = c; }
int Rational::get_d(){ return d; }
void Rational::set_n(int c){ n = c; }
int Rational::get_n(){ return n; }
Rational::~Rational()
{
}
bool Rational::equal(float a, float b, float c, float d)
{
if (a / c == b / d) // if its the same number (mone/mone = mechane/mechane).
{
return true;
}
else
{
return false;
}
}
void Rational::help(int x, int y)
{
if (x*y>0||x>0) // minimize pozitive rational number (and allso negative only in case: mechane negative)
{
int i = 1;
while (i <= x)
{
if (x%i == 0) // if the mone divided in this num (i)......
{
if (y%i == 0) // so chack.. if the mechane allso divided in this num (i) so we can minimize the nember.
{
x /= i; y /= i; // so minimize the nember by dividing in this (i).
}
}
i++;
}
d = x; n = y; // now update the valuse of tje numbers in the class.
}
if (x<0) // minimize negative rational number only in case: mone negative)
{
int i = -1;
while (i >= x)
{
if (x%i == 0) // if the mone divided in this num (i)......
{
if (y%i == 0) // so chack.. if the mechane allso divided in this num (i) so we can minimize the nember.
{
x /= i; y /= i; // so minimize the nember by dividing in this (i).
}
}
i--;
}
d = x; n = y; // now update the valuse of tje numbers in the class.
}
}
Rational Rational::operator+(Rational &a)
{
int d2 = d * a.get_n() + n*a.get_d();
int n2 = n*a.get_n();
Rational Temp(d2,n2);
return Temp;
}
Rational Rational::operator-(Rational &a)
{
int d2 = d * a.get_n() - n*a.get_d();
int n2 = n*a.get_n();
Rational Temp(d2, n2);
return Temp;
}
Rational Rational::operator/(Rational &a)
{
int d2 = d * a.get_n();
int n2 = n*a.get_d();
Rational Temp(d2, n2);
return Temp;
}
bool Rational::operator>(Rational &a)
{
if (d*n>0&&a.get_d()*a.get_n()>0) // if the tow rationwl numbers are positive: (mone(a)*mechane(a)>0 and mone(b)*mechane(b)>0)
{
if (d*a.get_n()>n*a.get_d())
{
return true;
}
else
{
return false;
}
}
if (d*n<0&&a.get_d()*a.get_n()<0) // if the tow rationwl numbers are negative (mone*moen<0 and mechane*mechane<0)
{
if (d*a.get_n()>n*a.get_d())
{
return true;
}
else
{
return false;
}
}
if (d*n>0&&a.get_d()*a.get_n()<0)
{
return true;
}
if (d*n<0&&a.get_d()*a.get_n()>0)
{
return false;
}
}
bool Rational::operator>=(Rational &a)
{
if (d*a.get_n()==n*a.get_d()) // if the tow rationwl numbers are equal:(mone(a)*mechane(b)=mone(b)*mechane(a))
{
return true;
}
if (d*n>0&&a.get_d()*a.get_n()>0) // if the tow rationwl numbers are positive: (mone(a)*mechane(a)>0 and mone(b)*mechane(b)>0)
{
if (d*a.get_n()>n*a.get_d())
{
return true;
}
else
{
return false;
}
}
if (d*n<0&&a.get_d()*a.get_n()<0) // if the tow rationwl numbers are negative (mone*moen<0 and mechane*mechane<0)
{
if (d*a.get_n()>n*a.get_d())
{
return true;
}
else
{
return false;
}
}
if (d*n>0&&a.get_d()*a.get_n()<0)
{
return true;
}
if (d*n<0&&a.get_d()*a.get_n()>0)
{
return false;
}
}
bool Rational::operator<(Rational &a)
{
if (d*n>0&&a.get_d()*a.get_n()>0) // if the tow rationwl numbers are positive (mone*moen>0 and mechane*mechane>0)
{
if (d*a.get_n()<n*a.get_d())
{
return true;
}
else
{
return false;
}
}
if (d*n<0&&a.get_d()*a.get_n()<0) // if the tow rationwl numbers are negative (mone*moen<0 and mechane*mechane<0)
{
if (d*a.get_n()<n*a.get_d())
{
return true;
}
else
{
return false;
}
}
if (d*n>0&&a.get_d()*a.get_n()<0)
{
return false;
}
if (d*n<0&&a.get_d()*a.get_n()>0)
{
return true;
}
}
bool Rational::operator!=(Rational &a)
{
if (d*a.get_n()!=n*a.get_d()) // if its the same number (mone/mone = mechane/mechane).
{
return true;
}
else
{
return false;
}
}
void Rational::print()
{
help(d,n);
if (d==n*-1)
{
cout<<-1;
}
if (d==n)
{
cout<<1;
}
else
{
if (d!=0&&n!=1&&n!=-1) // if mone diffrent from 0 and mechane diffrent from 1
{
cout<<d<<"/"<<n;
}
else
{
if (d==0||n==1)
{
cout<<d;
}
if (n==-1)
{
cout<<d*-1;
}
}
}
}
Rational Rational::operator++(int x)
{
Rational Temp(d,n);
d= d+n; // D æä äîåðä ùìé
return Temp;
}
Rational Rational::operator--(int x)
{
Rational Temp(d,n);
d=d-n;
return Temp;
}
Rational Rational::operator--()
{
d=d-n;
return *this;
}
הצהרה על פוקציות המחלקה
#pragma once
class Rational
{
private:
int d;
int n;
public:
Rational();
Rational(int x, int y);
void set_d(int);
int get_d();
void set_n(int);
int get_n();
void help(int,int);
bool equal(float a, float b, float c, float d);
void print();
Rational operator++(int);
Rational operator--(int);
Rational operator--();
Rational operator+(Rational &a);
Rational operator-(Rational &a);
Rational operator/(Rational &a);
bool operator>(Rational &a);
bool operator>=(Rational &a);
bool operator<(Rational &a);
bool operator!=(Rational &a);
~Rational();
};
נכתב ע"י Benny