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Negation Operator. Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const.

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Presentation on theme: "Negation Operator. Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const."— Presentation transcript:

1 http://cs.mst.edu Negation Operator

2 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; }

3 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main m_Numerator: 9 m_Denominator: 32 g in main

4 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main rhs in operator- m_Numerator: 9 m_Denominator: 32 g in main *this in operator-

5 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main rhs in operator- m_Numerator: 9 m_Denominator: 32 g in main *this in operator- m_Numerator: ? m_Denominator: ? temp

6 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main rhs in operator- m_Numerator: 9 m_Denominator: 32 g in main *this in operator- m_Numerator: -9 m_Denominator: ? temp

7 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main rhs in operator- m_Numerator: 9 m_Denominator: 32 g in main *this in operator- m_Numerator: -9 m_Denominator: 64 temp

8 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main rhs in operator- m_Numerator: 9 m_Denominator: 32 g in main *this in operator- m_Numerator: -9 m_Denominator: 64 temp

9 http://cs.mst.edu Code Trace // main.cpp... g = -f;... // fraction.h... class Fraction { friend Fraction operator-(const Fraction & rhs);... // fraction.cpp Fraction operator-(const Fraction & rhs) { Fraction temp; temp.m_Numerator = -rhs.m_Numerator; temp.m_Denominator = rhs.m_Denominator; return temp; } m_Numerator: 9 m_Denominator: 64 f in main rhs in operator- m_Numerator: -9 m_Denominator: 64 g in main *this in operator- m_Numerator: -9 m_Denominator: 64 temp

10 http://cs.mst.edu Not Operator

11 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; }

12 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; } m_Numerator: 9 m_Denominator: 64 f in main

13 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; } m_Numerator: 9 m_Denominator: 64 f in main *this in operator!

14 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; } m_Numerator: 9 m_Denominator: 64 f in main *this in operator! 9 temp

15 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; } m_Numerator: 64 m_Denominator: 64 f in main *this in operator! 9 temp

16 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; } m_Numerator: 64 m_Denominator: 9 f in main *this in operator! 9 temp

17 http://cs.mst.edu Code Trace // main.cpp... !f;... // fraction.h... class Fraction { void operator!();... // fraction.cpp void Fraction::operator ! () { int temp = m_Numerator; m_Numerator = m_Denominator; m_Denominator = temp; return; } m_Numerator: 64 m_Denominator: 9 f in main *this in operator! 9 temp

18 http://cs.mst.edu End of Session

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