Compilare: user.cpp: In function ‘int main()’: user.cpp:38: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:41: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:44: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:3: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:4: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:6: warning: ‘d’ may be used uninitialized in this function