Compilare: user.cpp: In function ‘int main()’: user.cpp:19:55: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(!((s>='a' && s<='z') || (s>='A' && s<='Z'))and(p>='a' && p<='z') || (p>='A' && p<='Z')){ ^ user.cpp:11:19: warning: unused variable ‘x’ [-Wunused-variable] int n,cuv,lit,x; ^ user.cpp:10:12: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] char s,p; ^