Its a lazy Holiday morning
Particularly I dont know what these Polish people are celebrating, anyway, here is the code for factorisation and checking for a prime number. for the primorial... i got lazy, and stuck probably... but I know y'all geniouses and you can finish it..hehedont forget to type exit to quit.
#include <iostream>
int fact(int);
bool is_prime(int);
int primorial(int);
using namespace std;
int main()
{
string choice;
int a;
while(choice!="exit"){
cout << "Choose a code to test" << endl;
cout << "CODE\t|\tDescription" << endl;
cout << "fact\t|\tCalculates Factorial" << endl;
cout << "prime\t|\tChecks if your number is prime or not" << endl;
cout << "primo\t|\tDescription" << endl;
cout << "exit\t|\tQuits the program" << endl;
cin >> choice;
if(choice=="fact"){
cout << "Enter a number to factorize\n";
cin >> a;
cout << "\nThe factorial is " << fact(a) << endl;}
if(choice=="prime"){
cout << "Enter a number\n";
cin >> a;
if(is_prime(a))
cout <<a<< " is a prime number.\n\n";
else
cout <<a<< " is not a prime number.\n\n";}
if(choice=="primo"){
cout << "Enter a number to primorialize\n";
cin >> a;
cout << "The primorial is " << primorial(a)<<endl<<endl;}
}
return 0;
}
int fact(int x)
{
if(x==1)
return x;
else
return x*fact(x-1);
}
bool is_prime(int x)
{
if(x==1)
return true;
if(x==2)
return true;
for(int y=2; y<x ; y++){
if(x%y==0)
return false;
else
return true;}
}
int primorial(int x)
{
////////smart people.. i need help!!!
}
