#include "stdio.h" #include "stdlib.h" #include "io.h" #include "math.h" #include "time.h"#define OK 1#define ERROR 0#define TRUE 1#define FALSE 0#define MAXSIZE 20 /* 存储空间初始分配量 */typedef int Status;typedef int SElemType; /* SElemType类型根据实际情况而定,这里假设为int *//* 两栈共享空间结构 */typedef struct {SElemType data[MAXSIZE];int top1; /* 栈1栈顶指针 */int top2; /* 栈2栈顶指针 */}SqDoubleStack;Status visit(SElemType c){printf("%d ",c);return OK;}/* 构造一个空栈S */Status InitStack(SqDoubleStack *S){ S->top1=-1;S->top2=MAXSIZE;return OK;}/* 把S置为空栈 */Status ClearStack(SqDoubleStack *S){ S->top1=-1;S->top2=MAXSIZE;return OK;}/* 若栈S为空栈,则返回TRUE,否则返回FALSE */Status StackEmpty(SqDoubleStack S){ if (S.top1==-1 && S.top2==MAXSIZE)return TRUE;elsereturn FALSE;}/* 返回S的元素个数,即栈的长度 */int StackLength(SqDoubleStack S){ return (S.top1+1)+(MAXSIZE-S.top2);}/* 插入元素e为新的栈顶元素 */Status Push(SqDoubleStack *S,SElemType e,int stackNumber){if (S->top1+1==S->top2) /* 栈已满,不能再push新元素了 */return ERROR; if (stackNumber==1) /* 栈1有元素进栈 */S->data[++S->top1]=e; /* 若是栈1则先top1+1后给数组元素赋值。 */else if (stackNumber==2) /* 栈2有元素进栈 */S->data[--S->top2]=e; /* 若是栈2则先top2-1后给数组元素赋值。 */return OK;}/* 若栈不空,则删除S的栈顶元素,用e返回其值,并返回OK;否则返回ERROR */Status Pop(SqDoubleStack *S,SElemType *e,int stackNumber){ if (stackNumber==1) {if (S->top1==-1) return ERROR; /* 说明栈1已经是空栈,溢出 */*e=S->data[S->top1--]; /* 将栈1的栈顶元素出栈 */}else if (stackNumber==2){ if (S->top2==MAXSIZE) return ERROR; /* 说明栈2已经是空栈,溢出 */*e=S->data[S->top2++]; /* 将栈2的栈顶元素出栈 */}return OK;}Status StackTraverse(SqDoubleStack S){int i;i=0;while(i<=S.top1){visit(S.data[i++]);}i=S.top2;while(i=MAXSIZE-2;j--)Push(&s,j,2);}printf("栈中元素依次为:");StackTraverse(s);printf("当前栈中元素有:%d \n",StackLength(s));Pop(&s,&e,2);printf("弹出的栈顶元素 e=%d\n",e);printf("栈空否:%d(1:空 0:否)\n",StackEmpty(s));for(j=6;j<=MAXSIZE-2;j++)Push(&s,j,1);printf("栈中元素依次为:");StackTraverse(s);printf("栈满否:%d(1:否 0:满)\n",Push(&s,100,1));ClearStack(&s);printf("清空栈后,栈空否:%d(1:空 0:否)\n",StackEmpty(s));return 0;}