Compilare: user.cpp: In function ‘void read()’: user.cpp:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void bf(int, int)’: user.cpp:41: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void prep()’: user.cpp:60: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int BF()’: user.cpp:81: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void recons()’: user.cpp:118: warning: comparison between signed and unsigned integer expressions user.cpp:126: warning: comparison between signed and unsigned integer expressions user.cpp:133: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:138: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:139: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result