Compilare: user.cpp: In function ‘void Add_To_Hash(int, unsigned int)’: user.cpp:56:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[val%MOD].size();i++) ^ user.cpp: In function ‘int Search(int, unsigned int)’: user.cpp:62:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<h[val%MOD].size();i++) ^ user.cpp: In function ‘void r(int&)’: user.cpp:22:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,stdin),pos=0; ^ user.cpp:28:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,stdin),pos=0; ^ user.cpp: In function ‘unsigned int Read_Word(int&)’: user.cpp:41:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,stdin),pos=0; ^ user.cpp:50:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(f,1,MAX,stdin),pos=0; ^ user.cpp: In function ‘int main()’: user.cpp:68:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("test.in","r",stdin); ^ user.cpp:69:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("test.out","w",stdout); ^