Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:19: error: request for member ‘x’ in ‘v’, which is of non-class type ‘c [3100]’ user.cpp:19: error: request for member ‘y’ in ‘v’, which is of non-class type ‘c [3100]’ user.cpp:19: error: request for member ‘r’ in ‘v’, which is of non-class type ‘c [3100]’ user.cpp:19: error: request for member ‘f’ in ‘v’, which is of non-class type ‘c [3100]’ user.cpp:15: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:16: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result