C++ error : terminate called after throwing an instance of 'std::bad_alloc'

Question

I use below code on eclipse and I get an error terminate "called after throwing an instance of 'std::bad_alloc' what(): std::bad_alloc".

I have RectInvoice class and Invoice class.

class Invoice { public:      //...... other functions..... private:    string name;    Mat im;    int width;    int height;    vector<RectInvoice*> rectInvoiceVector;  }; 

And I use below code on a Invoice's method.

        // vect : vector<int> *vect;          RectInvoice rect(vect,im,x, y, w ,h);         this->rectInvoiceVector.push_back(&rect); 

And I want to change eclipse memory in eclipse.ini file. But I dont authorized for this.How can I do this?

Answer 1

The problem in your code is that you can't store the memory address of a local variable (local to a function, for example) in a globlar variable:

RectInvoice rect(vect,im,x, y, w ,h); this->rectInvoiceVector.push_back(&rect); 

There, &rect is a temporary address (stored in the function's activation registry) and will be destroyed when that function end.

The code should create a dynamic variable:

RectInvoice *rect =  new RectInvoice(vect,im,x, y, w ,h); this->rectInvoiceVector.push_back(rect); 

There you are using a heap address that will not be destroyed in the end of the function's execution. Tell me if it worked for you.

Cheers

Answer 2

Something throws an exception of type std::bad_alloc, indicating that you ran out of memory. This exception is propagated through until main, where it "falls off" your program and causes the error message you see.

Since nobody here knows what "RectInvoice", "rectInvoiceVector", "vect", "im" and so on are, we cannot tell you what exactly causes the out-of-memory condition. You didn't even post your real code, because w h looks like a syntax error.