Compilare: user.cpp: In function ‘void create_Hash()’: user.cpp:28: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void clear_Hash()’: user.cpp:43: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void get(unsigned int&)’: user.cpp:57: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp:63: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result user.cpp: In function ‘void get_Hash(unsigned int)’: user.cpp:75: warning: comparison between signed and unsigned integer expressions user.cpp:87: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘int main()’: user.cpp:100: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:102: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result