Program Deret Penjumlahan C++

 #include <iostream> 

using namespace std;

int main()

{

  cout << "  Program Deret Penjumlahan   " << endl;

  cout << "______________________________" << endl;

  int a, n, total;

  cout << "Jumlah deret yang diinginkan: ";cin >> n;

  cout << endl;

  

  total = 1;

  cout << 1;

  for (a = 2; a <= n; a++) {

     cout << " + " << a;

     total = total + a;

  }

  cout << " = " << total;

  

  cout << endl;

  return 0;

}