Owl Get a Life

Compile Error

addition.cpp:2:20: error: expected ‘;’ before ‘signed’
2 | using namespace std
| ^
| ;
......
5 | signed main(){
| ~~~~~~
addition.cpp: In function ‘int main()’:
addition.cpp:8:6: error: no match for ‘operator<<’ (operand types are ‘std::istream’ {aka ‘std::basic_istream<char>’} and ‘long long int’)
8 | cin << a << b;
| ~~~ ^~ ~
| | |
| | long long int
| std::istream {aka std::basic_istream<char>}
addition.cpp:8:6: note: candidate: ‘operator<<(int, long long int)’ <built-in>
8 | cin << a << b;
| ~~~~^~~~
addition.cpp:8:6: note: no known conversion for argument 1 from ‘std::istream’ {aka ‘std::basic_istream<char>’} to ‘int’
In file included from /usr/include/c++/9/regex:62,
from /usr/include/x86_64-linux-gnu/c++/9/bits/std