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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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