Compilare: user.cpp: In function ‘void _read()’: user.cpp:24:21: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(ch>='a' && ch<='z' || ch>='A' && ch<='Z') ^ user.cpp: In function ‘int main()’: user.cpp:42:26: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 3 has type ‘long long int’ [-Wformat=] fprintf(out,"%ld",cr/cuv); ^