[C/C++] Vereinfachung dieses Programmes

#include <iostream>
using namespace std;

 

int main() {
 cout << "Enter ISBN like 1-234-56789\n\n";
 
 int isbn[9];
 
 for (int count = 0; count < 9; count++){
 cout << "\t-> number " << count+1 << ": ";
 cin >> isbn[count];
 }
 cout << "\n\n\t-> Your ISBN: " << isbn[0] << "-" << isbn[1] << isbn[2] << isbn[3]
 << "-" << isbn [4] << isbn [5] << isbn [6] << isbn [7] << isbn [8];
 
 int checksum = (isbn[0] * 1 + isbn[1] * 2 + isbn[2] * 3 + isbn[3] * 4 + isbn[4] * 5 + isbn[5] * 6 + isbn[6] * 7 + isbn[7] * 8 + isbn[8] * 9) % 11 ;

 cout << "\nYour Checksum: ";
 if (checksum != 10) cout << checksum;
 else cout << "X";
 cout << "\n\n"; 
 cin.get();
 cin.get();
 
}