Code::Blocks ругается

#include<iostream>
using namespace std;
int counter_1 = 0, counter_0 = 0;
inline void myFunc();
int main()
{
    for(int a = 1; a <= 100 ;a++) myFunc();
    cout << "Orel " << counter_0 << "\n";
    cout << "Resko " << counter_1 << "\n";
    cin.get();
    return 0;
}
 
inline void myFunc()
{
   int a;
   a = rand() % 1 + 0;
   if (a == 1) counter_1++;
   else if (a == 0) counter_0++;
   cout << a << "\n";
}

a = rand() % 2;

#include <iostream>
#include <ctime>
 
using namespace std;
 
int counter_1 = 0, counter_0 = 0;
inline void myFunc();
 
int main()
{
    srand(time(NULL));
    for(int a = 1; a <= 100 ;a++) myFunc();
    cout << "Orel " << counter_0 << "\n";
    cout << "Resko " << counter_1 << "\n";
    return 0;
}
 
inline void myFunc()
{
    int a = rand() % 2;
    if (a) counter_1++;
    else counter_0++;
    cout << a << "\n";
}

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

srand(time(NULL));