Search DaniWeb - operator<<

Re: operator() 18 Years Ago by Rashakil Fol …string greeting_text; int operator()(const std::string& greetee) { std::cout << greeting_text << ", " << greetee << "!" << std::endl;… world!" std::cout << x << std::endl; // outputs 12345 [/code] Generally speaking, operator() tries to provide the ability … Re: += operator - Cannot get this to return correct value to application 15 Years Ago by Banfa … the object it is called on, unlike the binary additional operator operator+ which does not alter the object it is called on… of x and y. You need to re-write your operator+= so that is does an in place calculation, that is… Re: Operator Overloading issue 15 Years Ago by Banfa operator+ is not in any way dependent on having any sort … this form (for a general type T) [code] T T::operator+(const T& rhs) { return T(*this) += rhs; } [/code] Which… having a copy constructor and an operator+=. However you do not have to implement your operator+ like this you can just implement… Re: operator- 17 Years Ago by ShawnCplus … meaningful variable names. [inlinecode]friend zz operator-(zz z);[/inlinecode] Secondly, the - operator is a binary operator. It accepts two operands, the left… pointer. So which are you trying to accomplish, the binary operator( [inlinecode]a-b[/inlinecode]) or the unary… operator- 17 Years Ago by tnvkrishna … : string s; //constructor private: friend zz operator-(zz z); //assume definition of operator<< }; //constructor //operator<< zz operator-(zz z) { string s; s=z.s… zz(s); } int main() { zz a("fsd"); cout<<(-a); } [/code] i am new to c++ but just enthusiastic Re: operator- 17 Years Ago by Duoas The code [inlinecode]-a[/inlinecode] is a unary operator, so he isn't trying to do anything weird. The argument to your operator function should be a reference: [inlinecode]zz operator - ( zz &z )[/inlinecode] Otherwise it looks fine. Re: [][] operator? 15 Years Ago by Narue Obviously you can't overload the [][] operator because no such operator exists. What you need to do for your MatrixClass class is overload the [] operator to return another type that also overloads the [] operator. Re: operator() 18 Years Ago by Nick Evan You can use operator() to overload operators... ok, say you've got a rectangle(… 2; The compiler will be very sad. If you make operator-overloading in your class, you can tell the compiler what…. I don't have a concrete example, but google for operator-overloading. operator() 18 Years Ago by disc …] [COLOR=#0000ff]bool[/COLOR][COLOR=#000000] MyClass::[/COLOR][COLOR=#0000ff]operator[/COLOR][COLOR=#000000]()()[/COLOR] [COLOR=#000000]{ [/COLOR] [COLOR=#000000] ....[/COLOR…] [COLOR=#0000ff]virtual[/COLOR] [COLOR=#0000ff]bool[/COLOR] [COLOR=#0000ff]operator[/COLOR]()(); } [/code] Re: operator() 18 Years Ago by Nick Evan … #include <iostream> using namespace std; class CVector { public: int x,y; CVector () {}; CVector (int,int); CVector operator + (CVector…int b) { x = a; y = b; } CVector CVector::operator+ (CVector param) { CVector temp; temp.x = x + param.x… CVector c; c = a + b; cout << c.x << "," << c.y; return 0; } [/code] Re: operator() 18 Years Ago by disc I already googled for operator overloading. Most of them I understand but not this specific one, operator(). [][] operator? 15 Years Ago by daviddoria …,i; [/code] You can make an accessor like: [code] double operator[](int index) { if(index == 0) return a; else if(index…] But how would you do something like this: [code] double operator[][](int rindex, int cindex) { if(rindex == 0 && cindex… operator << >> 15 Years Ago by xzero_x … will correct a C++ program that has errors in which operator, << or >>, it uses with cin and cout.… The program replaces each (incorrect) occurrence of cin<< With the corrected version cin>> And each (…one blank between the cin and cout and the following operator. The program to be corrected is in one file … ; operator 14 Years Ago by crapgarden …++] = "armor"; inventory[numItems++] = "shield";[/CODE] the ++ operator increments the array number of inventory AFTER it reaches the… ; operator? All POST operations are performed at the end of a … operator 12 Years Ago by Abhinisha what is the use of the dot operator(.) and -> operator? Operator 11 Years Ago by Learner010 … doubt : is it possible to treat string value like a operator ? for example : let suppose , there are 2 variable named `a… type named `opertor_type` of string type which will store the operator symbol. a=10 b=20 operator_type="+" and here… Re: operator 11 Years Ago by Vincentas These are meant to be member and pointer operators. "->" is a Structure dereference operator and "." is Member a pointer. But i doubt this will mean anything to you, I'd suggest you read a book on C++ or get some tutorials online. Vincentas Re: Operator 11 Years Ago by ddanbe What you are trying to do is indeed not possible. There is something like [operator overloading](http://msdn.microsoft.com/en-us/library/ms379613(v=vs.80).aspx), but it is rarely needed in every day use of VB, so I would not spoil my learning energy on it right now. Re: Operator 11 Years Ago by Learner010 thanks for quick reply. i wanted to know to if there exist any other way to use strings as operator but i didn't find any useful that's why i created thread here and now i am sure that this is really very rare . thanks. Operator for between? 15 Years Ago by Dasau Hi I would like to know what operator to use for a number in between my input. Is it something like this? If I input the number between 116 and 200. [CODE]else if (Earn>=116)&&(Earn <=200)[/CODE] Operator Overloading and some math issues... 14 Years Ago by Syrne …&); bool operator== (const Fraction&); bool operator!= (const Fraction&); Fraction operator> (const Fraction&); Fraction operator< (const Fraction&); Fraction operator<= (const… Operator Insertion Overload C++ help, and errors 14 Years Ago by ana_1234 … in, MyInt& f); friend ostream& operator<<(ostream& out, MyInt& f); // ….integer2[count]; count++; }*/ return in; } ostream& operator<<(ostream& out, MyInt& f) { for(int i…z.NumberList[i] %= 10; return z; } } } bool operator< (const MyInt& f1, const MyInt& f2) { … Operator Overloading 13 Years Ago by lbgladson … << "+" << z << " = " << x << endl; // Test overloaded subtraction operator x = y - z; cout << y << " - " << z << " = " <&lt… Re: Operator Overloading 13 Years Ago by lbgladson …(imaginaryPart) { } ostream& operator<<(ostream& output, const Complex& c) { output << c.imaginary << "+" << c.real << "i"… Operator Overloading HELP! 17 Years Ago by balla4eva33 …(dist1 < dist2) ... bool operator < (Distance & d2) ; // ************************************** void getdist() //get length from user { cout << "… true : false; } // used for if (dist1 < dist2) ... bool Distance::operator < (Distance & d2) { int b1 = feet … Re: Operator Overloading and some math issues... 14 Years Ago by mrnutty [CODE] Fraction Fraction :: operator* (const Fraction& fr2) { int numen = (numerator * fr2.[COLOR="Red"]numerator[/COLOR]); int denom = (denominator * fr2.denominator); return Fraction (numen, denom); // Trouble here } [/CODE] Re: Operator Overloading and some math issues... 14 Years Ago by Syrne [QUOTE=firstPerson;1407041][CODE] Fraction Fraction :: operator* (const Fraction& fr2) { int numen = (numerator * fr2.[COLOR="… operator issues 14 Years Ago by MasterGberry … & operator<<(std::ostream …operator<<(std::ostream & os, const Vector & v) { if (v.mode == 'r') os << "(x,y) = (" << v.x <&lt…operator<<(std::ostream & os, const VectorMath & v) { os << "Max is " << v.max.magval() << ", Min is " <&lt… Operator Overloading 13 Years Ago by DrShroom … * operator RationalNumber operator/(RationalNumber&) ; //overload the / operator RationalNumber operator>(RationalNumber &); RationalNumber operator<(RationalNumber &); RationalNumber operator>=(RationalNumber &); RationalNumber operator<=(RationalNumber &); RationalNumber operator… Re: Operator Overloading 13 Years Ago by lbgladson …;; cout << x; cout << ") = ("; cout << y; cout << ") + ("; cout << z; cout << ")" << endl; // Test overloaded subtraction operator x…