#include <iostream>
using namespace std; int main(int argc, const char * argv[]) {
float fee = 0.50;
int widthdrawl = 0.00;
float balance = 0.00;
//cout << "Enter widthdrawl amount and bank balance ex[30 120]" << endl;
cout.precision(6);
cin >> widthdrawl;
cin >> balance;
while(balance > 0){
if((widthdrawl + fee) > balance) {
cout << balance << endl;
// cout << "Not enough money in account" << endl;
break;
}
else if(widthdrawl % 5 != 0) {
cout << balance << endl;
//cout << "Did not enter a multiple of 5" << endl;
break;
}
else if((widthdrawl % 5 == 0)) {
balance = balance - widthdrawl - fee;
cout << balance << endl;
break;
}
}
return 0;
}
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