Write a C++ program to find the number of pairs of integers in a given array of integers whose sum is equal to a specified number.

Write a C++ program to find the missing element from two given arrays of integers except one element.

Write a C++ program to find the two repeating elements in a given array of integers

Write a C++ program to move all negative elements of an array of integers to the end of the array without changing the order of positive element and negative element.

 Write a C++ program to separate even and odd numbers of an array of integers. Put all even numbers first, and then odd numbers. 

Write a C++ program to find the most occurring element in an array of integers.

Write a C++ program to find k largest elements in a given array of integers.

Write a C++ program to find the largest three elements in an array.

Write a C++ program to find the largest element of a given array of integers.