Binary operator overloading

Binary operator overloading

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  G.BALAJI MCA, M.Tech., AssistantProfessor of Computer Science Vivekananda College, Madurai
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  Operator Overloading:  Operator– It is a symbol that indicates an operation. Arithmetic operators are + (add two numbers), - (subtract two numbers), * ( Multiply two numbers), / ( Divide between two numbers).  At now, we will take an Addition ‘+’ Sign, its use of ‘+’ sign is 5+5=10 2.5+2.5=5
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   Operator Overloadingmeans multiple functions or multiple jobs. In operator overloading the ‘+’ sign use of add the two objects.  One of C++’s great features is its extensibility, Operator Overloading is major functionality related to extensibility.  In C++, most of operators can be overloaded so that they can perform special operations relative to the classes you create.
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   For Example,‘+’ operator can be overloaded to perform an operation of string concatenation along with its pre-defined job of adding two numeric values.  When an operator is overloaded, none of its original meaning will be lost.  After overloading the appropriate operators, you can use C++’s built in data types.
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   Unary Operator -Operators attached to a single operand. (-a, +a, --a, ++a, a--, a++)  Binary Operator - Operators attached to two operand. (a-b, a+b, a*b, a/b, a%b, a>b, a<b )
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  return-type class-name:: operatorop(arg-list) { function body } EXPLANATION  return type – It is the type of value returned by the specified operation.  op - It is the operator being overloaded. It may be unary or binary operator. It is preceded by the keyword operator.  operator op - It is the function name, Where operator is a keyword.
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  INTRODUCTION  In Binaryoperator overloading function, there should be one argument to be passed.  It is overloading of an operator operating on two operands.
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  #include<iostream> class multiply { int first,second; public: voidgetdata(int a,int b) { first=a; second=b; } Contd...,
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  void display() { cout<<“first=“<<first<<“second=“<<secon<<endl; } multiply operator*(multiply c); }; void multiply::operator *(multiply c) { multiply temp; temp.first=first*c.first; temp.second=second*c.second; return temp; } Contd..,
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  int main() { multiply obj1,obj2,obj3; obj1.getdata(15,20); obj2.getdata(3,45); obj3=obj1*obj2; obj3.display(); return0; } Output: 45 900