Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:16: error: ‘stdin’ was not declared in this scope user.cpp:16: error: ‘freopen’ was not declared in this scope user.cpp:17: error: ‘stdout’ was not declared in this scope user.cpp:18: error: ‘scanf’ was not declared in this scope user.cpp:32: warning: comparison between signed and unsigned integer expressions user.cpp:45: error: ‘printf’ was not declared in this scope user.cpp:47: error: ‘printf’ was not declared in this scope user.cpp:49: error: ‘printf’ was not declared in this scope