Compilare: main.cpp: In function 'int main()': main.cpp:202:13: warning: unused variable 'st' [-Wunused-variable] int st=1,dr=k,rasp; ^~ main.cpp:202:18: warning: unused variable 'dr' [-Wunused-variable] int st=1,dr=k,rasp; ^~ main.cpp:202:23: warning: unused variable 'rasp' [-Wunused-variable] int st=1,dr=k,rasp; ^~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:19:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^