bank.cpp: In function 'int main()':
bank.cpp:4:22: warning: statement is a reference, not call, to function 'std::ios_base::sync_with_stdio' [-Waddress]
4 | #define io ios_base::sync_with_stdio;
| ~~~~~~~~~~^~~~~~~~~~~~~~~
bank.cpp:7:5: note: in expansion of macro 'io'
7 | io;
| ^~
bank.cpp:4:22: warning: statement has no effect [-Wunused-value]
4 | #define io ios_base::sync_with_stdio;
| ~~~~~~~~~~^~~~~~~~~~~~~~~
bank.cpp:7:5: note: in expansion of macro 'io'
7 | io;
| ^~
bank.cpp:8:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
8 | freopen("bank.in", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bank.cpp:9:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
9 | freopen("bank.out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~