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POC++ Overload = operator
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  1. POC++ Overload = operator
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    copied!<p>I'm not sure why I get the following error when trying to overload the = operator</p> <pre><code>error: passing ‘const MyCircle’ as ‘this’ argument of ‘double MyCircle::getRadius()’ discards qualifiers| </code></pre> <p>Code:</p> <pre><code>#include &lt;iostream&gt; #define PI 3.14 using namespace std; class MyCircle { public: MyCircle(); MyCircle(int r); MyCircle(const MyCircle&amp; c); void setRadius(double r); double getRadius(); double getArea(); static void increaseInstanceCount(); static int getInstanceCount(); MyCircle operator=(const MyCircle &amp;); private: double radius; static int instanceCount; }; int MyCircle::instanceCount = 0; /** 1. A default constructor, that sets the radius to 0 **/ MyCircle::MyCircle() { radius = 0.0; increaseInstanceCount(); } /** 2. A one argument costructor that accepts an int and uses it to initialize the radius **/ MyCircle::MyCircle(int r) { radius = r; increaseInstanceCount(); } /** 3. A copy constructor that accepts a Circle reference as an argument, and uses it to initialize radius **/ MyCircle::MyCircle(const MyCircle&amp; c) { radius = c.radius; increaseInstanceCount(); } void MyCircle::increaseInstanceCount() { instanceCount++; } int MyCircle::getInstanceCount() { return instanceCount; } void MyCircle::setRadius(double r) { radius = r; } double MyCircle::getRadius() { return radius; } double MyCircle::getArea() { return (radius * radius) * PI; } //overload = operator MyCircle MyCircle::operator=(const MyCircle &amp;rhs) { if(this == &amp;rhs) return *this; radius = rhs.getRadius(); return *this; } int main() { MyCircle circle; circle.setRadius(5.4); MyCircle circle2; circle2.setRadius(3.0); MyCircle circle3; circle3.setRadius(343.3); cout &lt;&lt; "Total instances: " &lt;&lt; circle.getInstanceCount() &lt;&lt; endl; return 0; } </code></pre>
 

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