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IsEquals Operator

IsEquals Operator. Code Trace. // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs ); ... // fraction.cpp bool operator==(const Fraction & lhs, const Fraction & rhs )

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IsEquals Operator

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  1. IsEquals Operator

  2. Code Trace // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • }

  3. Code Trace // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } f in main g in main m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32

  4. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32

  5. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 64

  6. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 9 64

  7. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 576

  8. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 32 576

  9. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 9 32 576

  10. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 576 288

  11. Code Trace f in main lhs in operator== g in main rhs in operator== // main.cpp ... int main() { if(f==g) ... // fraction.h ... class Fraction { friend bool operator==(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator==rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 576 288 false

  12. NotEquals Operator

  13. Code Trace // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • }

  14. Code Trace // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } f in main g in main m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32

  15. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32

  16. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 64

  17. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 9 64

  18. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 576

  19. Code Trace f in main lhs in operator!= g in main rhs in operato!r= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 32 576

  20. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 9 32 576

  21. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 576 288

  22. Code Trace f in main lhs in operator!= g in main rhs in operator!= // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator!=(const Fraction & lhs, const Fraction & rhs) • { • return lhs.m_Numerator*rhs.m_Denominator!=rhs.m_Numerator*lhs.m_Denominator; • } m_Numerator: 9 m_Denominator: 64 m_Numerator: 9 m_Denominator: 32 576 288 true

  23. Alternative Definition // main.cpp ... int main() { if(f!=g) ... // fraction.h ... class Fraction { friend bool operator!=(const Fraction & lhs, const Fraction & rhs); ... // fraction.cpp • bool operator==(const Fraction & lhs, const Fraction & rhs) • { • return !(lhs==rhs); • }

  24. End of Session

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