(Class) Menghitung Jumlah Deret

#include <cstdlib>
#include <iostream>

using namespace std;

class hitung
{
     
public:
       int proses();
       void input();

private:
        int n;
        float rumus,jumlah,total;
};

void hitung::input()
{
     cin >> n;
     cout << endl;
}
   
int hitung::proses()
{
    jumlah = 0;
    total = 0;
    rumus = -1;

          for(int j=1; j<=n; j++){
                  rumus = (rumus * (-1));
                  total = rumus / j;
                  jumlah+= total;
                  if(j==1)
                  cout << " ( " << total << " ) ";
                       if( j > 1)
                           cout << " + ( " << total << " ) ";
}

cout << endl << endl << "Jumlah Rekursif = " << jumlah;
cout << endl;
cout << endl;

return jumlah;
}

int main(int argc, char *argv[])
{
    cout << "\t\t\tSlamet Islan Al Hidayah\n";
    cout << "\t\t\t\t10018075\n";
    cout << "\t\t\t\t   B\n";
    cout << endl;
    cout << endl;
    cout << "    Program Menghitung Jumlah dari  \n";
    cout << " Rumus 1-(1/2)+(1/3)-(1/4)+...+(1/n) \n";
    cout << endl;
    cout << endl;
    cout << " Masukkan Nilai n : ";            
   
    hitung deret;
    deret.input();
    deret.proses();
   
    system("PAUSE");
    return EXIT_SUCCESS;
}

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