Compilare: user.cpp: In function ‘int main()’: user.cpp:13:18: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(x>='a'&&x<='z'||x>='A'&&x<='Z') ^ user.cpp:15:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(y>='a'&&y<='z'||y>='A'&&y<='Z') ^