Method withdraw

2043-simple-bank-system.rs:40–49

(&mut self, account: i32, money: i64)

    }

    fn withdraw(&mut self, account: i32, money: i64) -> bool {
        if self.balance.get(account as usize - 1) == None {
            return false;
        }
        if self.balance[account as usize - 1] < money {
            return false;
        }
        self.balance[account as usize - 1] -= money;
        true
    }
}

fn main() {