Compilare: main.cpp: In member function 'int ifbuffer::getnr()': main.cpp:43:27: warning: array subscript has type 'char' [-Wchar-subscripts] while ( !isDigit[c] ) ^ main.cpp:45:26: warning: array subscript has type 'char' [-Wchar-subscripts] while ( isDigit[c] ) ^ main.cpp: In function 'int main()': main.cpp:94:28: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings] ifbuffer fin("cufar.in"); ^ main.cpp: In member function 'void ifbuffer::refill()': main.cpp:25:37: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread( text, 1, size, file ); ^