Compilare: user.cpp: In function ‘void Read()’: user.cpp:15: 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 user.cpp:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘bool SPairUp(int)’: user.cpp:77: warning: no return statement in function returning non-void user.cpp: In function ‘void Print()’: user.cpp:102: warning: suggest parentheses around arithmetic in operand of ‘^’ user.cpp:98: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result