Eroare de compilare: user.cpp: In function ‘int renum()’: user.cpp:67: error: ‘memset’ was not declared in this scope user.cpp:85: warning: no return statement in function returning non-void user.cpp: In function ‘int check_state(int)’: user.cpp:102: warning: no return statement in function returning non-void user.cpp: In function ‘int main()’: user.cpp:220: error: ‘stdin’ was not declared in this scope user.cpp:220: error: ‘freopen’ was not declared in this scope user.cpp:221: error: ‘stdout’ was not declared in this scope user.cpp:223: error: ‘scanf’ was not declared in this scope user.cpp:275: error: ‘printf’ was not declared in this scope user.cpp:216: warning: unused variable ‘start’ user.cpp:277: warning: unused variable ‘stop’