Problem	psle
User	blackpanther
Submission Time	2025-04-02 10:45:01
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

psle.cpp: In function ‘int main()’:
psle.cpp:6:15: error: ‘null’ was not declared in this scope
6 | string grade=null;
| ^~~~