Compilare: user.cpp: In function ‘int main()’: user.cpp:10:15: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z') ^ user.cpp:15:16: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (b >= 'a' && b <= 'z' || b >= 'A' && b <= 'Z') ^ user.cpp:17:17: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if ((b >= 'a' && b <= 'z' || b >= 'A' && b <= 'Z') && !(a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z')) ^ user.cpp:17:68: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if ((b >= 'a' && b <= 'z' || b >= 'A' && b <= 'Z') && !(a >= 'a' && a <= 'z' || a >= 'A' && a <= 'Z')) ^