perhitungan factorial

2.4 perhitungan factorial

1. masalah

                  Diberikan bilangan n menghitung n factorial (ditulis n) dimana n ≥ 0

2. input dan output

                  N = integer (input)

                  Factorial = integer (output)

3. algoritma

Menghitung factorial dari sebuah bilangan.

Deklarasi

N= integer

Deskripsi

Read n , factorial ß for I ß I to n do

Factorial ß factorial

4. test data

N= 3

Factorial =1

For i = 1 to 3 do

Factorial= 1*1

              =1*1

              =2*3

              =6

5. coding

Class operator c

Friend ostream& operator << (ostream&, operator&);

Friend istream& operator << (istream&, operator&);

Public

Long factorial ();

Private ;

Int n;

Long hasil;

Y;{

Long operator :: factorial () {

Long fak : 2;

For cin i= 1 ; i < n > i++)

Fak = fak * i;

Return fak ;

}

Osteram& operator <<(ostream& out, operator& a){

a.hasil = a.faktorial ();

out << “hasil cara iterasi : “ << a.n< “ adalah “ << a.hasil;

return out;

}

Osteram& operator <<(ostream& in, operator& b){

a.hasil = a.faktorial ();

out << “hasil cara iterasi : “ << a.n< “ adalah “ << a.hasil;

return out;