Compilare: user.cpp: In function ‘int readint()’: user.cpp:71:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!('0' <= buffer[bpos] && buffer[bpos] <= '9')) ^ user.cpp:71:48: warning: array subscript has type ‘char’ [-Wchar-subscripts] while (!('0' <= buffer[bpos] && buffer[bpos] <= '9')) ^ user.cpp:77:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] while ('0' <= buffer[bpos] && buffer[bpos] <= '9') ^ user.cpp:77:46: warning: array subscript has type ‘char’ [-Wchar-subscripts] while ('0' <= buffer[bpos] && buffer[bpos] <= '9') ^ user.cpp:79:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] x = 10 * x + buffer[bpos] - '0'; ^ user.cpp:74:61: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (bpos == bsize) fread(buffer , 1 , bsize , stdin); ^ user.cpp:81:61: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] if (bpos == bsize) fread(buffer , 1 , bsize , stdin); ^ user.cpp: In function ‘int main()’: user.cpp:89:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("struti.in" , "r" , stdin); ^ user.cpp:90:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("struti.out" , "w" , stdout); ^ user.cpp:92:34: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer , 1 , bsize , stdin); ^