Eroare de compilare: user.cpp:3: error: expected nested-name-specifier before ‘manespace’ user.cpp:3: error: ‘manespace’ has not been declared user.cpp:3: error: expected ‘;’ before ‘std’ user.cpp:3: error: expected constructor, destructor, or type conversion before ‘;’ token user.cpp: In function ‘int main()’: user.cpp:7: error: ‘ifstream’ was not declared in this scope user.cpp:7: error: expected ‘;’ before ‘f’ user.cpp:8: error: ‘f’ was not declared in this scope user.cpp:9: error: ‘ofstream’ was not declared in this scope user.cpp:9: error: expected ‘;’ before ‘g’ user.cpp:18: error: ‘g’ was not declared in this scope user.cpp:21: error: ‘g’ was not declared in this scope