Game - player vs. pc

[LAM21hU5]

So I have a game in which you insert how much items are in the pile. Then the player takes 1-3 items from the pile. Then the PC takes a random count of items again 1-3. The winner is the one who takes the last item of the pile. So here is the code with P1 vs. P2:

#include<iostream>
using namespace std;
int main(){
long long items,taken_from_P_one,taken_from_P_two,which_player;
cout<<"How much items are in the pile?"<<endl;
cin>>items;
while(items>0){
which_player=1;
cout<<"P1 take 1-3 items."<<endl;
cin>>taken_from_P_one;
items-=taken_from_P_one;
cout<<"There are "<<items<<" items left."<<endl;
if(items<=0){
goto end;
}
which_player=2;
cout<<"P2 take 1-3 items."<<endl;
cin>>taken_from_P_two
items-=taken_from_P_two
cout<<"There are"<<items<<" items left."<<endl;
}
end:
if(which_player==1){
cout<<"P1 wins";
}else{
if(which_player==2){
cout<<"P2 wins";
}
}
return 0;
}

and here is the random number generator:

#include <cstdlib>
#include <ctime>
#include <iostream>

long long getRandom( long long min, long long max )
{
    long long range = max-min+1 ;

    return rand() % range + min ;
}

int main()
{
    srand(std::time(0)) ;
    std::cout << getRandom(1, 3) << "\n" ;
}

how could I put the random number generator code inside the game so P2 is the computer and takes a random count of items still 1-3?

[MiiNiPaa]

which_player=2;
cout<<"P2 take 1-3 items."<<endl;
//cin>>taken_from_P_two;
taken_from_P_two = getRandom(1,3);

[LAM21hU5]

Thanks