Eroare de compilare: user.cpp:1:21: error: yostream.h: No such file or directory user.cpp:2: warning: ISO C++ forbids declaration of 'main' with no type user.cpp: In function 'int main()': user.cpp:4: error: 'ifstream' was not declared in this scope user.cpp:4: error: expected `;' before 'in' user.cpp:5: error: 'ofstream' was not declared in this scope user.cpp:5: error: expected `;' before 'out' user.cpp:6: error: 'in' was not declared in this scope user.cpp:8: error: 'out' was not declared in this scope user.cpp:8: error: 'endl' was not declared in this scope