请问这段怎么写简单点?
int Input = 0;
cin >> Input;
if (Input == 1 || Input == 2 || Input == 3) {
switch (Input) {
case 1:
cout << " 1 " << endl;
break;
case 2:
cout << " 2 " << endl;
break;
case 3:
cout << " 3 " << endl;
break;
}
}
else {
while (Input != 1 && Input != 2 && Input != 3) {
cout << "请输入正确的数字: ";
cin >> Input;
}
switch (Input) {
case 1:
cout << " 1 " << endl;
break;
case 2:
cout << " 2 " << endl;
break;
case 3:
cout << " 3 " << endl;
break;
}
}