program:
#include < iostream>
using namespace std;
class myclass
{
public:
//Factorial function
int fact(int n)
{
int i,ans=1;
for(i=n;i>0;i--)
{
ans=ans*i;
}
return ans;
}
};
int main()
{
int n,ans;
myclass obj;
cout<<"Enter any numbern";
cin>>n;
ans=obj.fact(n);
cout<<"Factorial is: "<< ans;
return 0;
}
Enter any number
5
Factorial is: 120