Suppose j, sum, and num are int variables, and the input is :                  25      30      51      3      - 2             What is the output of the following code?             int num, j, sum = 0;             cout << "Please input five numbers here: ";                         cin >> num;             for (j = 1; j <= 4; j++)             {                         sum = sum + num;                         cin >> num;             }             cout << "\nThe sum is: " << sum << endl;

// SumAndProduct.cpp - This program computes sums and products // Input: Interactive// Output: Computed sum and product #include <iostream>#include <string>void sums(int);void products(int);using namespace std; int main() { int number; cout << "Enter a positive integer or 0 to quit: "; cin >> number; while(number != 0) { // Call sums function here // Call products function here cout << "Enter a positive integer or 0 to quit: "; cin >> number; } return 0;} // End of main function// Write sums function here// Write products function here

Please code in C++

Explain the code and how it works: #include <iostream>#include <cmath> using namespace std;double to_kilograms(double n){    return n * 0.453592;}double to_pounds(double n){    return n * 2.20462;}double to_kilograms_ref(double& n){    return n * 0.453592;}double to_pounds_ref(double& n){    return n * 2.20462;}double to_kilograms_ptr(double* n){    return *n * 0.453592;}double to_pounds_ptr(double* n){    return *n * 2.20462;}   void display_menu(){    cout << "1.Kilograms to Pounds (pass by value)\n2. Pounds to Kilograms (pass by value)\n3. Kilograms to Pounds (pass by reference)\n4. Pounds to Kilograms (pass by reference)\n5. Kilograms to Pounds (using pointers)\n6. Pounds to Kilograms (using pointers)\nEnter choice\n\n";} void convert(){    int ch;    double w;    cout << "Enter a menu option: ";    cin >> ch;    cout << "Enter weight: ";    cin >> w;     if (ch == 1)        cout << "weight in kg is " << to_kilograms(w);…