Eroare de compilare: user.cpp:1:20: error: stdio.h.: No such file or directory user.cpp: In function ‘int main()’: user.cpp:23: error: ‘stdin’ was not declared in this scope user.cpp:23: error: ‘freopen’ was not declared in this scope user.cpp:24: error: ‘stdout’ was not declared in this scope user.cpp:25: error: ‘scanf’ was not declared in this scope user.cpp:34: error: ‘printf’ was not declared in this scope