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division

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This commit is contained in:
Tobias Berger 2021-09-21 09:30:49 +02:00
parent e245ab83a1
commit 0e6e7268ee
3 changed files with 39 additions and 0 deletions
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19
fraction.cpp
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@ -183,4 +183,23 @@ namespace FractionNS {
reduce(); reduce();
return *this; return *this;
} }
Fraction& Fraction::operator/(const int n) const {
return *new Fraction(m_numerator, m_denominator * n);
}
Fraction& Fraction::operator/(const Fraction& other) const {
return *new Fraction(m_numerator * other.getDenominator(), m_denominator * other.getNumerator());
}
Fraction& Fraction::operator/=(const int n) {
m_denominator *= n;
reduce();
return *this;
}
Fraction& Fraction::operator/=(const Fraction& other) {
m_numerator *= other.getDenominator();
m_denominator *= other.getNumerator();
reduce();
return *this;
}
} }

6
fraction.hpp
View file

@ -49,5 +49,11 @@ namespace FractionNS {
Fraction& operator*=(const int); Fraction& operator*=(const int);
Fraction& operator*=(const Fraction&); Fraction& operator*=(const Fraction&);
Fraction& operator/(const int) const;
Fraction& operator/(const Fraction&) const;
Fraction& operator/=(const int);
Fraction& operator/=(const Fraction&);
}; };
} }

14
tst_fractiontest.cpp
View file

@ -21,6 +21,7 @@ private slots:
void test_inequivalence(); void test_inequivalence();
void test_substraction(); void test_substraction();
void test_multiplication(); void test_multiplication();
void test_division();
}; };
FractionTest::FractionTest() {}; FractionTest::FractionTest() {};
@ -196,6 +197,19 @@ void FractionTest::test_multiplication()
QCOMPARE(f1 * Fraction(2, 3), 4); QCOMPARE(f1 * Fraction(2, 3), 4);
} }
void FractionTest::test_division() {
Fraction f1 = Fraction(1, 1);
const Fraction f2 = Fraction(1, 2);
QCOMPARE(f1 / 2, f2);
f1 /= 2;
qDebug() << f1.display();
QCOMPARE(f1, 0.5);
QCOMPARE(f1 / 2, 0.25);
QCOMPARE((f1 / 2) / Fraction(2, 3), Fraction(3, 8));
}
QTEST_APPLESS_MAIN(FractionTest) QTEST_APPLESS_MAIN(FractionTest)
#include "tst_fractiontest.moc" #include "tst_fractiontest.moc"