C++ Dynamic allocation failing code example

Example 1: C++ Dynamic allocation failing

int * foo;
foo = new (nothrow) int [5];
if (foo == nullptr) {
  // error assigning memory. Take measures.
}

Example 2: C++ Dynamic allocation failing

foo = new (nothrow) int [5];

Example 3: C++ Dynamic allocation failing

foo = new int [5];  // if allocation fails, an exception is thrown