Compilare: user.cpp: In function ‘void make_prefix(int)’: user.cpp:63:9: warning: unused variable ‘i’ [-Wunused-variable] int i,q = 0; ^ user.cpp: In function ‘int make_match(int, int)’: user.cpp:75:9: warning: unused variable ‘i’ [-Wunused-variable] int i, q = 0; ^ user.cpp: In function ‘void cit(int&)’: user.cpp:26:59: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz == DIM) fread(buffer,1,DIM,stdin),poz = 0; ^ user.cpp:30:59: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++poz == DIM) fread(buffer,1,DIM,stdin),poz = 0; ^ user.cpp: In function ‘int main()’: user.cpp:127:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbnr.in","r",stdin); ^ user.cpp:128:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("arbnr.out","w",stdout); ^