#include <iostream>
#include <iomanip>
#include <stdlib.h>
#include <time.h>
#include <string>
using namespace std;

int main()
{
      int a;
      string roll;
      cout << "You can't write 'roll' in the beginning of the program. Chose a dice before doing this, otherwise the program will crash." << endl << endl;
      while(true)
      {
      
      cout << "What dice do you want to use? (6, 20, 100): "; 
       cin >> a;

     
      
      switch (a)
      {
      case 6:
      cout << "Write 'roll' to roll the dices: ";
      
      if(cin>>roll)
      
      srand(time(0));    
	  cout << "Your roll\a " << rand()%6+1 << setiosflags(ios::fixed) << setprecision(2);
	  cout << endl << endl;
	  break;
	  
      case 20:
      cout << "Write 'roll' to roll the dices: ";
      
      if(cin>>roll)
      
      srand(time(0));    
      cout << "Your roll\a " << rand()%20+1 << setiosflags(ios::fixed) << setprecision(2);
	  cout << endl << endl;
	  break;
	  
      case 100:
      cout << "Write 'roll' to roll the dices: ";
      
      if(cin>>roll)
      
      srand(time(0));    
	  cout << "Your roll\a " << rand()%100+1 << setiosflags(ios::fixed) << setprecision(2);
	  cout << endl << endl;
	  break;
	  
	  default:
      
      system("cls");
      
      cout << "You can't write 'roll' in the beginning of the program. Chose a dice before doing this, otherwise the program will crash." << endl << endl;
      cout << "Sorry, we don't have those dices. Please choose again.";
      
	  
      cout << endl;
	  break;
	  
      }
      
          
}
      
      
 system("pause");    
      
}