Compilare: user.cpp: In function ‘void bf(int)’: user.cpp:27: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void bf1(int)’: user.cpp:45: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:83: warning: comparison between signed and unsigned integer expressions user.cpp:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:57: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:59: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:61: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:64: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:71: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result