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 lt RectInvoice  gt  rectInvoiceVector        And I use below code on a Invoice s method              vect   vector lt int gt   vect           RectInvoice rect vect im x  y  w  h           this- gt rectInvoiceVector push back  amp rect     And I want to change eclipse memory in eclipse ini file  But I dont authorized for this How can I do this

User · Answer

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

User · Answer

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

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

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