Compilare: user.cpp:30:0: warning: "maxN" redefined [enabled by default] #define maxN 1024 ^ user.cpp:14:0: note: this is the location of the previous definition #define maxN 1000011 ^ user.cpp: In function ‘int main()’: user.cpp:122:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("harta2.out","w",stdout); ^ user.cpp: In member function ‘void Buffer::reFill()’: user.cpp:62:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(&data[0], 1, dim, stdin); ^ user.cpp: In constructor ‘Buffer::Buffer(std::string, int)’: user.cpp:37:46: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen(name.c_str(), "r", stdin); ^