Compilare: user.cpp: In function ‘void df(int)’: user.cpp:24: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void critice(int)’: user.cpp:51: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void bf(int)’: user.cpp:75: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:151: warning: comparison between signed and unsigned integer expressions user.cpp:128: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:129: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:131: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:135: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:166: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:169: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result