Problem	mathtest
User	Josh28
Submission Time	2022-12-28 20:15:41
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

mathtest.cpp:128:58: error: empty character constant
128 | while(str.length() > 0 && str[str.length()-1] == '') {str.pop_back();}
| ^~