Belajar TPT Semester Lalu

#include <iostream.h>

#include <stdio.h>

#include <conio.h>

long int fak (long int x);

void main()

{

int y,z, Prts,pilihan,s;

char ulang;

do

{

cout<<"===>Raisa Dwi Selviani Hermansyah<==="<<endl<<endl;

cout<<"|*****************************|"<<endl;;

cout<<"|PROGRAM PERHITUNGAN PERMUTASI|"<<endl;

cout<<"|*****************************|"<<endl;;

cout<<"|1. PERMUTASI                 |"<<endl;

cout<<"|2. KELUAR                    |"<<endl;

cout<<"|*****************************|";

cout<<endl<<endl;

cout<<" Pilih Angka : ";cin>>pilihan; cout<<endl;

switch (pilihan)

{

case 1 :

cout<<" Program Menghitung Permutasi(yPz)";

cout<<endl;

cout<<" Masukkan Nilai y : "; cin>>y;

cout<<endl;

cout<<" Masukkan Nilai z : "; cin>>z;

cout<<endl;

if (y>z)

{

Prts = fak (y)/fak(y-z);

cout<<endl;

printf(" Permutasinya adalah: %d",Prts);

cout<<endl;

}

else if (y<z)

{

cout<<"data salah";}

cout<<endl ;

break;

case 2 :

cout<<"*****Bye Bye*****"<<endl<<endl;

break;

default:

cout<<"Fatal Error, Please Wait..."<<endl<<endl;

break;

}

cout<<"Back to Main Menu (y/n)?";cin>>ulang;

cout<<endl<<endl<<endl<<endl;

}

while(ulang == 'y');

}

getch();

long int fak (long int y)

{

int f;

if (y<=1)

{

f=1;

}

else

{

f=y*fak(y-1);

}

return (f);

}