Notes
This function is in beta test. Please help improve it in the issues
here.
Hints
Your answer may be identical to the JOJ answer in the first several lines.
However, the main problem you meet now is Runtime Error. And the exit code of your program is -11, which should be 0.
Please double check your code to solve this problem and try again.
Your Answer
Welcome to the library management system, please type your commands. > b1 added to the system. > b2 added to the system. > c1 added to the system. > c2 added to the system. > Success! b1 is borrowed by c1. > Fail! The book was borrowed by another customer. >
JOJ Answer
Welcome to the library management system, please type your commands. > b1 added to the system. > b2 added to the system. > c1 added to the system. > c2 added to the system. > Success! b1 is borrowed by c1. > Fail! The book was borrowed by another customer. > Success! b2 is borrowed by c2. > 1 b1 borrowed 2 b2 borrowed > 1 c1 2 c2 > Success! The following book has been returned: 1 b1 > Success! b1 is borrowed by c2. > Book borrowed by c2: 1 b1 2 b2 > Success! The following book has been returned: 1 b1 > Book borrowed by c2: 2 b2 > Success! The following book has been returned: 2 b2 > Fail! The book has not been borrowed. > Exit the system!