Compilare: user.cpp: In function ‘int main()’: user.cpp:39: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:38: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:45: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:44: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:51: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:50: warning: suggest explicit braces to avoid ambiguous ‘else’ user.cpp:57: warning: suggest parentheses around ‘&&’ within ‘||’ user.cpp:56: warning: suggest explicit braces to avoid ambiguous ‘else’