判断出栈顺序

#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW -2
#define LIST_INIT_SIZE 100
#define LISTINCREMENT 10
typedef int status;
typedef char elemtype;
elemtype str[100];
typedef struct node{
      elemtype *base;
      elemtype *top;
      int size;
}sqstack;
status initstack(sqstack &s){//初始化栈
     s.base=(elemtype *)malloc(LIST_INIT_SIZE*sizeof(elemtype));
     if(!s.base)
        exit(OVERFLOW);
        s.top=s.base;
        s.size=LIST_INIT_SIZE;
        return OK;
}
status get_top(sqstack s,elemtype &e){//获得栈顶元素
     if(s.top==s.base)
     return ERROR;
     e=*(s.top-1);
     return OK;
}
status push(sqstack &s,elemtype e){//向栈中输入元素
     if(s.top-s.base>=s.size){
        s.base=(elemtype *)realloc(s.base,(LIST_INIT_SIZE+LISTINCREMENT)*sizeof(elemtype));
        if(!s.base)
             exit(OVERFLOW);
             s.top=s.base+s.size;
             s.size+=LISTINCREMENT;
     }
     *s.top++=e;
     return OK;
}


status pop(sqstack &s,elemtype &e){//删除栈顶元素
      if(s.top==s.base)
      return ERROR;
      e=*--s.top;
      return OK;
}
status empty(sqstack &s){//判断栈是否为空
      if(s.base==s.top)
      return TRUE;

      else
      return FALSE;
}
status clearstack(sqstack &s){//将栈清空
    elemtype c;
         while(empty(s)){
           pop(s,c);
         }
}
int getlenght(char str1[]){
  int cnt=0;
  for(int i=0;str1[i];i++){
    cnt++;
  }
  return cnt;
}
int a[150];
int main(){
    int n;

        while(scanf("%d",&n)!=EOF){
           for(int i=1;i<=n;i++)
           scanf("%d",&a[i]);
        sqstack s;
        initstack(s);
        int cur=1;
        elemtype e;
        for(int i=1;i<=n;i++){
           push(s,i);
           while(!empty(s)){
              get_top(s,e);
              if(e==a[cur]){
              pop(s,e);
              cur++;
              }
              else
              break;
           }
        }
        if(!empty(s)||cur!=n+1)
        printf("No
");
        else
        printf("Yes
");
        }
        return 0;
}
原文地址:https://www.cnblogs.com/13224ACMer/p/5036719.html