Eroare de compilare: user.cpp:1: error: stray ‘@’ in program user.cpp:1: error: expected constructor, destructor, or type conversion before ‘<’ token user.cpp:3: error: ‘::main’ must return ‘int’ user.cpp: In function ‘int main()’: user.cpp:4: error: ‘cin’ was not declared in this scope user.cpp:4: error: ‘a’ was not declared in this scope user.cpp:4: error: ‘b’ was not declared in this scope user.cpp:5: error: ‘s’ was not declared in this scope user.cpp:6: error: ‘cout’ was not declared in this scope