第十七课 实验三:栈的表示与实现及栈的应用

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教学目的: 掌握栈的存储表示方式和栈基本操作的实现方法
教学重点: 栈的基本操作实现方法,栈的应用
教学难点: 栈的存储表示
实验内容:
一、栈的实现
实现栈的顺序存储。
栈实现示例
#include#include#include#define ERROR 0#define TRUE 1#define FALSE 0#define OK 1#define EQUAL 1#define OVERFLOW -1#define STACK_INIT_SIZE 100#define STACKINCREMENT 10typedef int Status ;struct STU{ char name[20]; char stuno[10]; int age; int score;};typedef struct STU SElemType;struct STACK{ SElemType *base; SElemType *top; int stacksize;};typedef struct STACK SqStack;typedef struct STACK *pSqstack;Status InitStack(SqStack **S);Status DestroyStack(SqStack *S);Status ClearStack(SqStack *S);Status StackEmpty(SqStack S);int StackLength(SqStack S);Status GetTop(SqStack S,SElemType *e);Status Push(SqStack *S,SElemType e);Status Pop(SqStack *S,SElemType *e);Status StackTraverse(SqStack S,Status (*visit)());Status InitStack(SqStack **S){ (*S)=(SqStack *) malloc(sizeof(SqStack)); (*S)->base=(SElemType *)malloc(STACK_INIT_SIZE *sizeof(SElemType)); if(!(*S)->base)exit(OVERFLOW); (*S)->top=(*S)->base; (*S)->stacksize=STACK_INIT_SIZE; return OK;}Status DestroyStack(SqStack *S){ free(S->base); free(S);}Status ClearStack(SqStack *S){ S->top=S->base;}Status StackEmpty(SqStack S){ if(S.top==S.base) return TRUE; else return FALSE;}int StackLength(SqStack S){ int i; SElemType *p; i=0; p=S.top; while(p!=S.base) {p++; i++; }}Status GetTop(SqStack S,SElemType *e){ if(S.top==S.base) return ERROR; *e=*(S.top-1); return OK;}Status Push(SqStack *S,SElemType e){ /* if(S->top - S->base>=S->stacksize) { S->base=(SElemType *) realloc(S->base, (S->stacksize + STACKINCREMENT) * sizeof(SElemType)); if(!S->base)exit(OVERFLOW); S->top=S->base+S->stacksize; S->stacksize += STACKINCREMENT; } */ *(S->top++)=e; return OK;}Status Pop(SqStack *S,SElemType *e){ if(S->top==S->base) return ERROR; *e=*--S->top; return OK;}Status StackPrintElem(SElemType * e){ printf("%s %s %d %d\n",e->name,e->stuno,e->age,e->score);}Status StackTraverse(SqStack S,Status (*visit)()){ while(S.top!=S.base) visit(--S.top);}main(){ SElemType e; SqStack *Sa; clrscr(); printf("\n\n-------------------SqStack Demo is running...----------------\n\n"); printf("First is Push function.\n"); InitStack(&Sa); strcpy(e.name,"stu1"); strcpy(e.stuno,"100001"); e.age=80; e.score=1000; printf(" Now Stack is Empty.\n"); StackTraverse(*Sa,StackPrintElem); Push(Sa,e); printf(" Now Stack has one element.\n"); StackTraverse(*Sa,StackPrintElem); strcpy(e.name,"stu3"); strcpy(e.stuno,"100002"); e.age=80; e.score=1000; Push(Sa,e); printf(" Now Stack has another element.\n"); StackTraverse(*Sa,StackPrintElem); printf(" Now Pop Stack,the top elem put into variable e.\n"); Pop(Sa,&e); printf("%s\n%s\n%d\n%d\n",e.name,e.stuno,e.age,e.score); printf(" Let's see the left of Stack's elem:\n"); StackTraverse(*Sa,StackPrintElem); getch(); printf("\n\n\nWelcom to visit http://zmofun.topcool.net\n\n");}