栈的应用——数值转换为任意进制

#include<stdio.h>
#include<malloc.h>
#include<stdlib.h>
#define  STACK_INIT_SIZE 100
#define  STACKINCREMENT 10

typedef struct sqstack
{
int *base;
int *top;
int stacksize;
}sqstack;

int InitStack(sqstack *s )
{
s->base=(int *)malloc(STACK_INIT_SIZE*sizeof(int));
if(!s->base)return 0;
s->top=s->base;
s->stacksize=STACK_INIT_SIZE;
return 1;
}
int Push(sqstack *s ,int e)
{
if(s->top-s->base>=s->stacksize)
{
s->base=(int *)realloc(s->base,(s->stacksize+STACKINCREMENT)*sizeof(int));
if(!s->base)return 0;
s->top=s->base+s->stacksize;
s->stacksize+=STACKINCREMENT;
}
*s->top++=e;
return e;
}

int Pop(sqstack *s, int e)
{
if(s->top==s->base)return 0;
e=*--s->top;
return e;
}
int StackEmpty(sqstack *s)
{
if(s->top==s->base)return 1;
else return 0;
}
int main()
{
int n,e,sh;
sqstack sq;
InitStack(&sq);
printf("输入要转化的数字\n");
scanf("%d",&n);
printf("输入要转化成几进制数\n");
scanf("%d",&sh);
printf("%d数转化成%d进制\n",n,sh);
while(n)
{
Push(&sq,n%sh);
n=n/sh;
}
while(!StackEmpty(&sq))
{
e=Pop(&sq,e);
switch(e)
{
case 10: printf("A");break;
case 11: printf("B");break;
case 12: printf("C");break;
case 13: printf("D");break;
case 14: printf("E");break;
case 15: printf("F");break;
default: printf("%d",e);
}
}
printf("\n");
return 0;
}