摘要：
1 #include 2 #include 3 #include 4 5 #define MAX 20 6 7 8 typedef struct stack{ 9 char item; 10 struct stack *next; 11 }stack; 12 13 char gettop_s(stack *h) //得到栈顶元素 14 { 15 char ch; 16 17 ch = h->item; 18 19 return ch; 20 } 21 22 stack * out_s(sta... 阅读全文
