harta1.cpp: In function 'bool AddHash(int)': harta1.cpp:17: warning: unused variable 'i' harta1.cpp: In function 'int main()': harta1.cpp:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result harta1.cpp:58: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result harta1.cpp:60: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result harta1.cpp:62: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result