Practice examples: resizable arrays

Complete the functions below to allocate/resize arrays:

  1. Allocating an array of floats: 
    // try to allocate an array of floats of the specified size
//    returning a ptr to the allocated space 
//    (NULL if unsuccessful)
float* allocateFloatArray(int size)

  2. Resizing an array of chars: 
    // given an array of chars of size oldSize,
//    allocate a new array of size newSize
// if allocation succeeds
//    copy the old contents into the new contents,
//    deallocate the old space,
//    set cPtr to point to the new space,
//    and return true
// otherwise leave cPtr untouched and return false
bool resizeCharArray(char* &cPtr, int oldSize, int newSize)