Compilare: user.cpp: In function ‘int main()’: user.cpp:21:21: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(k>='a'&&k<='z'||k>='A'&&k<='Z') ^ user.cpp:28:27: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘long long unsigned int’ [-Wformat=] fprintf(g,"%d",lit/cuv); ^