Д/з.№2(b).С++

#include <iostream>

using namespace std;

int main()
{
cout << "kakoe chuslo?";
cout << endl;
int var;
cin >> var;
int a=0;
while (a < var) {
        a=a+1;
    cout << a;
    if (a!=var) {
            cout << ",";
    }
}
}