#include "iostream"
using namespace std;
class Rational {
private:
int numerator;
int denominator;
public:
Rational(int numerator, int denominator) : numerator(numerator), denominator(denominator) {
reduce();
}
Rational() {
numerator = 5;
denominator = 9;
}
Rational add(const Rational &number){
Rational t;
t.numerator = number.numerator * denominator + number.denominator * numerator;
t.denominator = number.denominator * denominator;
if (denominator != 0) t.reduce();
return t;
}
Rational subtract(const Rational &number) {
Rational t;
t.numerator = number.denominator * numerator - denominator * number.numerator;
t.denominator = number.denominator * denominator;
if (denominator != 0) t.reduce();
return t;
}
Rational multiply(const Rational &number) {
int newNumerator = this->numerator * number.numerator;
int newDenominator = this->denominator * number.denominator;
Rational answer(newNumerator, newDenominator);
return answer;
}
Rational divide(const Rational &number){
Rational t;
t.numerator = number.denominator * numerator;
t.denominator = denominator * number.numerator;
if (denominator != 0) t.reduce();
return t;
}
Rational reduce() {
int n = numerator < 0 ? -numerator : numerator;
int d = denominator;
int largest = n > d ? n : d;
int gcd = 0; // greatest common divisor
for (int loop = largest; loop >= 2; loop--)
if (numerator % loop == 0 && denominator % loop == 0) {
gcd = loop;
break;
}
if (gcd != 0) {
numerator /= gcd;
denominator /= gcd;
}
}
void toRationalString() {
cout<<endl<<numerator<<"/"<<denominator<<endl;
}
double toDouble() {
return (double)numerator / (double) denominator;
}
};
int main()
{
Rational number1(6,12); // 3/4 The initialisers are passed and the constructor initialises the object!
Rational number(7,8); // 5/9 The default values are given to this number since no initialisers are passed
cout<<"The rational numbers are: \n";
number1.toRationalString();
number.toRationalString();
Rational answerAdd = number1.add(number);
answerAdd.toRationalString();
cout<<answerAdd.toDouble()<<endl;
Rational answerSub = number1.subtract(number);
answerSub.toRationalString();
cout<<answerSub.toDouble()<<endl;
Rational answerMultiply = number1.multiply(number);
answerMultiply.toRationalString();
cout<<answerMultiply.toDouble()<<endl;
Rational answerDivide = number1.divide(number);
answerDivide.toRationalString();
answerDivide.toDouble();
cout<<answerDivide.toDouble()<<endl;
return 0;
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C++ is a widely used middle-level programming language.
When ever you want to perform a set of operations based on a condition If-Else is used.
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You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
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For loop is used to iterate a set of statements based on a condition.
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While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while (condition) {
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return_type function_name(parameters);
function_name (parameters)
return_type function_name(parameters) {
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}