以下程序的运行结果是：___________________。main(){ struct/* 局部定义结构 */{int a;char b;}variable;variable.a=1111;variable.b='A';fun(variable.a);printf(" a=%d\n", variable.a);printf(" b=%d\n", variable.b);}fun(nam)struct{int x;char y;}nam;/*定义形参*/{printf(" x1=%d\n",nam.x);nam.x=2222; /*重新赋值*/nam.y='B';printf(" x2=%d\n",nam.x);printf(" x2=%d\n",nam.y);return;}