Jakie są te błędy? jak mogę je naprawić?

Uczę się C++ i piszę program dealera kart. Kiedy kompiluję kod i otrzymuję te błędy:

dealer3.cpp:12: error: expected initializer before ‘int’
dealer3.cpp:33: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:34: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:35: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:36: error: expected constructor, destructor, or type conversion before ‘=’ token
dealer3.cpp:37: error: expected constructor, destructor, or type conversion before ‘<<’ token
dealer3.cpp:38: error: expected declaration before ‘}’ token

A oto mój kod

#include<iostream>
#include<time.h>
#include<stdlib.h>
#include<cmath>

using namespace std;

int randn(int n);
void draw();
int uni(int n);
char *suits[4]={"Hearts","Diamonds","spades","clubs"};
char *ranks[13]={"ace","two","three","four","five","six","seven","eight","nine","ten","jack","queen","king"};
int drawn[52];
int remaining=52;
int main() {
    int n;
    int i;
    srand(time(NULL));
    while(1) {
       cout<<"enter number of cards to draw"<<endl;
       cin>>n;
       if (n==0) break;

for (i=1; i<=n; i++)
    draw();
}

    return 0;
}
int r;
int s;
int n;
int card;
n=randn(remaining--);
card=uni(n);
    r=card%13;
    s=card/13;
    cout<<ranks[r]<<" of "<<suit[s]<<endl;
}
int uni(int n)
{
int i=0;
while (drawn[i])
    i++;
while (n-->0){
    i++;
while (drawn[i])
    i++;
}
card_drawn([i])=true;
return i;
}
int randn (int n){
return rand()%n;
}

Dlaczego to?