CODEWITHSUNDEEP
c++classoperator-overloading
user2924131
user2924131

Reputation: 1

C++ Operator Overloading Error

I am encountering an error reading, no matching conversion for functional style cast from 'int' to 'TrashCan'.

here is the declaration in header:

class TrashCan
{
friend TrashCan operator +( TrashCan& left,
                          TrashCan& right);
public:
TrashCan();
int size=0;
int item=0;

void setSize(int);
void addItem();

here is my implementation:

TrashCan operator +(const TrashCan& left,
              const TrashCan& right) {
TrashCan t= TrashCan( left.size + right.size );
return( t );

}

here is the main with operator at bottom:

int main( ) {

cout << "Welcome to My TrashCan Program!" << endl;

TrashCan myCan;
TrashCan yourCan;

yourCan.setSize( 12 );
myCan.setSize( 12 );

yourCan.addItem( );
yourCan.addItem( );
myCan.addItem( );

myCan.printCan();
yourCan.printCan();

//TrashCan combined = yourCan + myCan;

Upvotes: 0

Views: 161

Answers (1)

user1508519
user1508519

Reputation:

Edit

You declare your constructor like this: TrashCan();

But you call it like this: TrashCan t= TrashCan( left.size + right.size );.

You need to have a second constructor like TrashCan(int nsize) : size(nsize) { }.

godel9 already put the answer in the comments, but here's a working code example:

#include <iostream>

class TrashCan {
    // Your declaration did not match your definition
    // Need to put const here
    friend TrashCan operator +(const TrashCan& left,
                          const TrashCan& right);
    public:
        TrashCan(int nsize) : size(nsize) { }
        ~TrashCan() { }
        int size;                      
};

TrashCan operator +(const TrashCan& left,
              const TrashCan& right) 
{
    TrashCan t= TrashCan( left.size + right.size );
    return( t );
}

int main()
{
    TrashCan tc1(10);
    TrashCan tc2(20);

    std::cout << (tc1 + tc2).size;
    // outputs 30
    return 0;
}

Upvotes: 3

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