| 92 | }; |
| 93 | |
| 94 | int main() |
| 95 | { |
| 96 | //auto logger = make_shared<ConsoleLogger>(); |
| 97 | |
| 98 | struct NullLogger : Logger |
| 99 | { |
| 100 | void info(const string& s) override {} |
| 101 | void warn(const string& s) override {} |
| 102 | }; |
| 103 | |
| 104 | // this will crash |
| 105 | shared_ptr<Logger> empty_logger; |
| 106 | auto logger = make_shared<NullLogger>(); |
| 107 | BankAccount account{ "primary account", 1000 }; |
| 108 | |
| 109 | account.deposit(2000); |
| 110 | account.withdraw(2500); |
| 111 | account.withdraw(1000); |
| 112 | |
| 113 | getchar(); |
| 114 | return 0; |
| 115 | } |