Penjumlahan ( inputan tambah tiga)

This is one program in the sum, but the input of kayboart be in a specified sum in the formula processing, ie by inserting a formula that input titambah with three inputs, the results or output + 3, if you want to plus three and input + 5 if you want to add with five and so adjust as the one you add or you want by mengsetting again the formula in the program.

#include <iostream.h>

class Awal {

public :

void masukan();

void proses();

void keluaran();

private:

int a;

int hasil;

};

void Awal::masukan() {

cout << "Masukkan bilangan input : ";

cin >> a;

cout<<endl<<endl;}

void Awal::proses() {

hasil = 3 + a; }

void Awal::keluaran() {

cout << "Hasil keluaran dari proses : " <<hasil;

cout<<endl<<endl;}

int main(int argc, char *argv[]){

Awal X;

X.masukan();

X.proses();

X.keluaran();

system("PAUSE");

return EXIT_SUCCESS; }