Code:
#include <conio.h>
#include <iostream.h>
/*Ham tra ve so nguyen tinh n! (Factorial)*/
long int Fac(int n) {
if(n==0)
return 1;
else
return n*Fac(n-1);
}
/*Chuong trinh chinh*/
void main(){
clrscr();
int n;
cout<<"Nhap vao gia tri cua n = ";
cin>>n;
cout<<n<<"! = "<<Fac(n);
getch();
}