vector.h | C header library for typed lists

In the purpose of my homework, I learned pointer to function and lambda function.
I create a class Rectangle that contain width and length and calculate area. One of the question is to create a class MyVector that is a derived class of stl vector and contain function called func that take in parameter a Boolean function and return true if at least one of the element in the vector is answer to the function otherwise, false will be returned.(I called this boolean function cmp)
In the main, I have to check if at least one rectangle have an area more that 50, if it is the case display all rectangle. I don't know how to use this pointer function very well, so can you help me understand this through my example

Rectangle class:

So I'm currently working on my bachelor thesis and I need to code a class hierarchy (using vector and matrix classes) in order to use methods for solving linear systems.

I coded the basic functions for both classes, and even tried them and they were working. But as I started to add more to the code, I noticed that the functions I used for adding elements to a matrix and displaying them basically stopped working although I don't think I modified them in any way (the same functions I used for the vector class still work).

In a way the functions work, because the couts are displayed, but I don't get to input the values at all.

Here's the vector class (and before you say anything, I don't want to use template):

I am trying to create a vector filled with class objects, and the class objects contain circular buffers as one of their members. I am running into this error:

Describe the problem

To read a model from official TensorFlow source (COCO SSD MobileNet v1) and perform inference with minimal.cc, we get the error below.

System information

• Host OS Platform and Distribution : Linux Ubuntu 16.04
• TensorFlow installed from (source or binary): From source (branch r1.12)
• Target platform: iMX.6 (Arm v7)

Please provide the exact sequence of commands/steps when you ran into the problem

I'm trying to implement my own emplace_back function but am unable to do so. Although, I have implemented the push_back already.

Also, I tried looking at: https://github.com/gcc-mirror/gcc/blob/master/libstdc%2B%2B-v3/include/bits/stl_vector.h, but couldn't understand from here also.

Please can anyone help me in this?

Thanks

I would like to share data (in the simplest case an array of integers) between C and Haskell using Haskell's FFI functionality. The C side creates the data (allocating memory accordingly), but never modifies it until it is freed, so I thought the following method would be "safe":

• After the data is created, the C function passes the length of the array and a pointer to its start.
• On the Haskell side, we create a ForeignPtr, setting up a finalizer which calls a C function that frees the pointer.
• We build a Vector using that foreign pointer which can be (immutably) used in Haskell code.

However, using this approach causes rather non-deterministic crashes. Small examples tend to work, but "once the GC kicks in", I start to get various errors from segmentation faults to "barf"s at this or this line in the "evacuation" part of GHC's GC.

What am I doing wrong here? What would be the "right way" of doing something like this?

I have a C header with the following declarations:

I am trying to build a function wrapping over haven::read_dta() similar to the wrap_function() defined in the code below.

My wrap_function() has a default variables = NULL, which should be able to pass NULL to haven::read_dta()'s col_select argument if no values are specified. However, passing the NULL from variables to col_select throws an error (i.e. 'Error: Can't find any columns matching col_select in data.').

Can someone help me understand why this happens and how could I build a wrap_function capable of passing a NULL default value to the lower-level function?

Thanks!

I need to extract a value for AT_EXECFN from a coredump file. For those who don't know this value is part of the auxiliary vector. It is really simple to get this value while in your running process, just use getauxval, however I couldn't find any information on how to do it when you have an ELF coredump file. I can find the NT_AUXV section of this file, but I can't find out how to find an exact string where AT_EXECFN is pointing to. Say I found AT_EXECFN in the coredump. According to this I'm going to get a struct with ann address where the actual value is stored. My question is how do I find this address in the coredump file?

I want to declare my 2D vector first, then give it a size.

But why I am getting error?

Can anyone explain me?