Compilare: user.cpp: In function ‘int main()’: user.cpp:18:26: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(!(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<'Z')&&i<=n)i++; ^ user.cpp:22:25: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while((s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<'Z')&&i<=n) ^