[C/C++] while문으로 구구단 만들기

#include <iostream>
using namespace std;
 
int main(){
    int dan = 2, num = 1;
    
    while(dan <= 9){
        cout << dan << "단---------\n";
        num = 1;
        while(num <= 9){
            cout << dan << " x "<< num << " = " 
            << dan * num << endl;
            num++;
        }
        dan++;
        cout << endl;        
    }
    
    return 0;
}