Compilare: user.cpp: In function ‘int main()’: user.cpp:25:21: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (t) ^ user.cpp:34:24: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (t) ^ user.cpp:45:27: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (t) ^ user.cpp:56:24: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (t) ^