View Code of Problem 1

#include<iostream>
int main(){
  int a,b;
  cin >> a >> b;
  cout << a+b << endl;
}
/*
Main.cc: In function 'int main()':
Main.cc:4:3: error: 'cin' was not declared in this scope
   cin >> a >> b;
   ^~~
Main.cc:4:3: note: suggested alternative:
In file included from Main.cc:1:
/usr/include/c++/8/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^~~
Main.cc:5:3: error: 'cout' was not declared in this scope
   cout << a+b << endl;
   ^~~~
Main.cc:5:3: note: suggested alternative:
In file included from Main.cc:1:
/usr/include/c++/8/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^~~~
Main.cc:5:18: error: 'endl' was not declared in this scope
   cout << a+b << endl;
                  ^~~~
Main.cc:5:18: note: suggested alternative:
In file included from /usr/include/c++/8/iostream:39,
                 from Main.cc:1:
/usr/include/c++/8/ostream:590:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^~~~
*/