Problem	exam
User	12345
Submission Time	2025-02-08 11:28:40
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

cc1plus: error: ‘::main’ must return ‘int’
exam.cpp: In function ‘int main()’:
exam.cpp:5:2: error: ‘cin’ was not declared in this scope
5 | cin >> a;
| ^~~
exam.cpp:7:3: error: ‘cout’ was not declared in this scope
7 | cout << "Hello World";
| ^~~~
exam.cpp:12:3: error: ‘cout’ was not declared in this scope
12 | cout << a*b;
| ^~~~