Compilare: user.cpp: In member function ‘bool Buffer::isDigit(char)’: user.cpp:40:22: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] return c >= '0' & c <= '9'; ^ user.cpp: In function ‘void Merge()’: user.cpp:58:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<fr.size() && j<sc.size()){ ^ user.cpp:58:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<fr.size() && j<sc.size()){ ^ user.cpp:67:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<fr.size()){ ^ user.cpp:71:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j<sc.size()){ ^ user.cpp: In function ‘int main()’: user.cpp:79:40: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] Buffer cin("compunere.in",1024*1024); ^ user.cpp:124:30: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<long int>::size_type {aka unsigned int}’ [-Wformat=] printf("%ld\n",ans.size()); ^ user.cpp:125:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<ans.size();i++){ ^ user.cpp:80:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("compunere.out","w",stdout); ^ user.cpp: In constructor ‘Buffer::Buffer(char*, long int)’: user.cpp:13:40: 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:43:43: 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; ^