Compilare: user.cpp: In member function ‘bool Buffer::isDigit(char)’: user.cpp:69:22: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] return c >= '0' & c <= '9'; ^ user.cpp: In member function ‘int Batog::update(int, long long int)’: user.cpp:136:9: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:147:31: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] Buffer fin("maxq.in",1<<20); ^ user.cpp:148:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxq.out","w",stdout); ^ user.cpp: In constructor ‘Buffer::Buffer(char*, long int)’: user.cpp:25:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(fileName,"r",stdin); ^ user.cpp: In member function ‘void Buffer::reFill()’: user.cpp:72:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&Buff[0],1,maxBuf,stdin); pos = 0; ^