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 | 
 
 
 
 
 
 
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
 
 
 
 
 #define MAXSIZE 100
 
 typedef int ElemType;
 
 
 typedef struct {
 ElemType * pBase;
 int top;
 } SqStack, *pSqStack;
 
 
 
 
 
 void InitStack(pSqStack S);
 bool IsFull(pSqStack S);
 bool PushStack(pSqStack S, ElemType elem);
 void TraverseStack(pSqStack S);
 bool IsEmpty(pSqStack S);
 bool PopStack(pSqStack S, ElemType * pElem);
 void ClearStack(pSqStack S);
 void DestoryStack(pSqStack S);
 
 
 
 int main(void)
 {
 SqStack S;
 
 InitStack(&S);
 PushStack(&S, 1);
 PushStack(&S, 2);
 PushStack(&S, 3);
 PushStack(&S, 4);
 PushStack(&S, 5);
 TraverseStack(&S);
 
 ElemType e;
 PopStack(&S, &e);
 PopStack(&S, &e);
 PopStack(&S, &e);
 TraverseStack(&S);
 
 DestoryStack(&S);
 TraverseStack(&S);
 
 return 0;
 }
 
 
 void InitStack(pSqStack S)
 {
 
 S->pBase = (ElemType*)malloc(sizeof(ElemType) * MAXSIZE);
 
 S->top = -1;
 }
 
 bool IsFull(pSqStack S)
 {
 return (S->top+1 == MAXSIZE );
 }
 
 
 bool PushStack(pSqStack S, ElemType elem)
 {
 if ( IsFull(S) ) {
 printf("栈已满,压栈失败!");
 return false;
 }
 
 S->pBase[++S->top] = elem;
 
 return true;
 }
 
 
 void TraverseStack(pSqStack S)
 {
 for ( int i = 0; i < S->top+1; i++ ) {
 printf("%d ", S->pBase[i]);
 }
 
 printf("\n");
 }
 
 bool IsEmpty(pSqStack S)
 {
 return ( -1 == S->top );
 }
 
 
 bool PopStack(pSqStack S, ElemType * pElem)
 {
 if ( IsEmpty(S) ) {
 printf("栈为空,出栈失败!");
 return false;
 }
 
 *pElem = S->pBase[S->top--];
 }
 
 
 void ClearStack(pSqStack S)
 {
 S->top = -1;
 }
 
 
 
 void DestoryStack(pSqStack S)
 {
 free(S->pBase);
 S->pBase = NULL;
 
 S->top = -1;
 }
 
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