Hi
I try to compile a program where the user can choose between a recursive and a iterative mode of factorial numbers but I didnt succeed, I am a new in c++ please help,
Her is my trying:
/*
#include <iostream.h>
#include <cstdlib>
using namespace std;
//-------------------
//char yours ();
//int read_n();
//int inter();
//int recur() ;
//int factorial(int);
//-------------------
int main()
{
int factorial (int num);
int num;
char yours;
const char inter= 'i';
const char recur= 'r';
cout <<"factorial"<<endl;
cout <<"Program is calculating n!"<<endl;
cout <<"choose a metode!"<< endl;
cout <<"i) iterativ mode"<< endl;
cout <<"r) recursiv mode"<<endl;
cout <<" [i/r]:";
cin>> yours;
int n = read_n();
if (yours == inter){
int result=1;int factorial (int num);
for (int i=1; i<=num; ++i)
result=result*=i;
cout<<" Result of interativ metode: "<<" "<<result<<"! = "<<num <<"." << endl;
}
else if (yours == recur)

{
int factorial (int num)
if (num==1)
return 1;
cout <<" Result of recusiv metode: "<<" "<<n<<"! = "<< factorial(num-1)*num<<"." << endl;
}
return 0;
}
//--------------------
int read_n()
{
int n;
cout <<" n (1 <= n <= 12):";
cin>> n;
if (n < 0||n<=12)
cout << "That is not a positive integer.\n";

return n;
}
//--------------------
//interativ metode
//int inter()
//{
// long sum = 1; int n;
// for (int i=1; i< n+1; i++)
// sum*=i;
// return sum;
//}
//-------------------
//recursiv metode.
//int rekur()
//{

//int factorial(int n); int temp;
//int n;
//if(n <= 1) return 1;

//temp = n * factorial(n - 1);
//return temp;