Compilare: user.cpp: In function ‘int main()’: user.cpp:18:60: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] else if(!((s>='a' && s<='z') || (s>='A' && s<='Z'))and(p>='a' && p<='z') || (p>='A' && p<='Z')){ ^ user.cpp:18:82: warning: ‘p’ may be used uninitialized in this function [-Wmaybe-uninitialized] else if(!((s>='a' && s<='z') || (s>='A' && s<='Z'))and(p>='a' && p<='z') || (p>='A' && p<='Z')){ ^