Compilare: user.cpp: In function ‘void Df(int)’: user.cpp:49: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Df2(int, int)’: user.cpp:58: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void Init(int)’: user.cpp:67: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:73: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:74: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:78: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:83: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:86: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result