stack.h

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#include<malloc.h>
#define STACK_INIT_SIZE 100
#define STACKINCREMENT 10
#define ERROR -1
#define OK 0
typedef int Status;
typedef int Elemtype;
typedef struct{
        Elemtype *base;
        Elemtype *top;
        int stacksize;
}NumStack,OpStack,SqStack;

Status DestroyStack(SqStack *s);
Status Pop(SqStack *s,Elemtype *e);
Status Push(SqStack *s,Elemtype e);
Status GetTop(SqStack s,Elemtype *e);
Status InitStack(SqStack *s);