How to create a dynamically-allocated 2D char array to make a simple ascii based snake game suitable for C89 language

In C++,define a vector object and initialize it with 3 values and then define an iterator that points to elements of this object, then ask the user to enter 3 more values and then add them to the previous vector and then print all elements in the vector.

How difficult is it to duplicate a collection of shared pointers into another array while using the C++ programming language? Create a list of the several approaches you may use to tackle the issue that has been presented to you. Is it the case that copying a shared pointer also copies the objects that it controls? Explain

You have made a device that automatically measures both distance from a magnet and the magnetic field strength at that distance. The device sends the pair of data to your computer as a pair of real numbers. However, the device moves back and forth as it takes data, so neither the field measurement nor the distance measurement arrives in ascending or descending order. Write a code vector_sort that receives a two-dimensional array of numbers and sorts them based on either the first column or the second column (this must be an input to the function. The function must also either sort high-to-low or low-to-high, based on an input value. Write a main function that can read up to twenty pairs of data. The main function must also input whether you want to sort high-to-low or low-to high. It must also input whether you want to sort on magnetic field or distance. Finally the code must print the pair data as originally entered and then, after calling vector_sort, the ordered pair data. C Program