#include <iostream>
using namespace std;
int main() {
// 1: coke (35)
// 2: black tea (30)
// 3: milk tea (40)
int choice;
cin >> choice;
int price;
switch (choice) {
case 1:
price = 35;
break;
case 2:
price = 30;
break;
case 3:
price = 40;
break;
default:
cout << "Not an option. Bye." << endl;
return -1; // abnormal exit
}
int coins;
cin >> coins;
if (coins >= price) {
cout << "You got your beverage with changes "
<< (coins - price) << " TWD" << endl;
} else {
cout << "Not enough coins. Insert more." << endl;
}
return 0;
}
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