Compilare: user.cpp: In function ‘void make()’: user.cpp:32: warning: unused variable ‘lf’ user.cpp: In function ‘int main()’: user.cpp:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void make()’: user.cpp:34: warning: ‘stv’ is used uninitialized in this function user.cpp:33: warning: ‘ok’ is used uninitialized in this function