Borderou de evaluare (job #624587)

Eroare de compilare: main.cpp: In function 'int main()': main.cpp:18:5: error: 'cin' was not declared in this scope 18 | cin>>n; | ^~~ main.cpp:2:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'? 1 | #include <fstream> +++ |+#include <iostream> 2 | main.cpp:19:5: error: 'cout' was not declared in this scope 19 | cout<<calc(n); | ^~~~ main.cpp:19:5: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?