Compilare: user.cpp: In function ‘void sift(int)’: user.cpp:25:12: warning: variable ‘cx’ set but not used [-Wunused-but-set-variable] int ok,cx; ^ user.cpp: In function ‘void urc(int)’: user.cpp:45:9: warning: variable ‘cx’ set but not used [-Wunused-but-set-variable] { int cx; ^ user.cpp: In function ‘int main()’: user.cpp:58:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("heapuri.out","w",stdout); ^ user.cpp:59:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff,1,buffs,stdin); ^ user.cpp: In function ‘void read(int&)’: user.cpp:13:93: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] while(buff[_pos]<'0'||buff[_pos]>'9') if(++_pos==buffs) fread(buff,1,buffs,stdin),_pos=0; ^ user.cpp:19:58: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if(++_pos==buffs)fread(buff,1,buffs,stdin),_pos=0; ^