Compilare: user.cpp: In function ‘void Read_data()’: user.cpp:94: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:95: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:96: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:97: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:99: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘bool Bun()’: user.cpp:153: warning: no return statement in function returning non-void user.cpp: In function ‘bool Back(int)’: user.cpp:243: warning: comparison between signed and unsigned integer expressions user.cpp:243: warning: comparison between signed and unsigned integer expressions user.cpp:243: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:285: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:286: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result