c語言程序

c語言程序 ———棧的實現

#include
#include
#define STACK_INIT_SIZE 10
#define STACKINCREMENT 2
struct Stack
{
char base;
char *top;
int stacksize;
};
struct Stack *InitStack(struct Stack *S) //創建空棧
{
S->base=(char *)malloc(STACK_INIT_SIZE * sizeof(char));
if(!S->base) {printf("error!"); return 0;}
S->top=S->base;
S->stacksize=STACK_INIT_SIZE ;
return S;
}
struct Stack *Push(struct Stack *S,char e) //向棧中插入元素
{
if(S->top-S->base==S->stacksize)
{
S->base=(char *)realloc(S->base,(S->stacksize+STACKINCREMENT * sizeof(char)));
if(!S->base) {printf("分配空間失敗"); return 0;}
S->top=S->base+S->stacksize;
S->stacksize+=STACKINCREMENT;
}
*(S->top)=e;
S->top++;
return S;
}
void Pop(struct Stack *S,char e) //刪除棧頂元素，並且返回其值
{
if(S->top==S->base) {printf("棧為空，無法刪除棧頂元素"); return 0;}
e=(--S->top);
printf("刪除的棧頂元素為：");
printf("%c\n",e);
}
int main()
{
struct Stack *S;
int e;
char i;
S=(struct Stack *)malloc(STACK_INIT_SIZE * sizeof(char));
if( !S->base) printf("error!");
InitStack(S);
printf("輸入要插入的元素e:");
scanf("%c",&e);
Push(S,&e);
Pop(S,&i);
return 0;

}

以上是我寫的c語言程序，運行的時候不管輸入什麼，輸出的都是x，求哪位大神講解下為什麼，實在是百思不得其解

最佳回答：

你的代碼都不能編譯

 #include<stdio.h>
#include<stdlib.h>
#define STACK_INIT_SIZE 10
#define STACKINCREMENT 2
struct  Stack
{
    char *base;
    char *top;
    int stacksize;
};
struct  Stack *InitStack(struct Stack *S)         //創建空棧
{
    S->base=(char *)malloc(STACK_INIT_SIZE * sizeof(char));
    if(!S->base)  {printf("error!");  return 0;}
    S->top=S->base;
    S->stacksize=STACK_INIT_SIZE ;
    return S;
}
struct Stack *Push(struct Stack *S,char e)       //向棧中插入元素
{
    if(S->top-S->base==S->stacksize)
    {
        S->base=(char *)realloc(S->base,(S->stacksize+STACKINCREMENT * sizeof(char)));
        if(!S->base) {printf("分配空間失敗"); return 0;}
        S->top=S->base+S->stacksize;
        S->stacksize+=STACKINCREMENT;
    }
    *(S->top)=e;
    S->top++;
    return S;
}
void Pop(struct Stack *S,char e)      //刪除棧頂元素，並且返回其值
{
    if(S->top==S->base)  {printf("棧為空，無法刪除棧頂元素"); return; } //void函數不能return 0;
    e=*(--S->top);
    printf("刪除的棧頂元素為：");
    printf("%c\n",e);
}
int main()
{
    struct Stack *S;
    char e; // 不能是int
    char i;
    S=(struct Stack *)malloc(STACK_INIT_SIZE * sizeof(char));
    if( !S->base) printf("error!");
    InitStack(S);
    printf("輸入要插入的元素e:");
    scanf("%c",&e);
    Push(S,e); //函數裡要求char，這裡不能取地址
    Pop(S,i); // 同上
    return 0;

}