总是提示这个错误，该怎么整啊？

Question

#include<stdio.h>#include<stdlib.h>#include<malloc.h>#define TRUE 1#define FALSE 0#define OK 1#define ERROR 0#define INSEASIBLE -1#define OVERFLOW -2#define STACK_INIT_SIZE 100 #define STACKINCREMENT 10 typedef int SElemType;typedef int Status;typedef struct{SElemType *base;SElemType *top;int stacksize;}SqStack;Status Initstack(SqStack &S){S.base=(SElemType*)malloc(STACK_INIT_SIZE*sizeof(SElemType));if(!S.base)exit(OVERFLOW);S.top=S.base;S.stacksize=STACK_INIT_SIZE;return OK;}Status Getstack(SqStack &S,SElemType &e){if(S.top==S.base)return ERROR;e=*(S.top-1);return OK;}Status Push(SqStack &S,SElemType e){if(S.top-S.base>=STACK_INIT_SIZE){S.base=(SElemType*)realloc(S.base,(STACK_INIT_SIZE+STACKINCREMENT)*sizeof(SElemType));if(!S.base)exit(OVERFLOW);S.top=S.base+S.stacksize;S.stacksize+=STACKINCREMENT;}*S.top++=e;return OK;}Status Pop(SqStack &S,SElemType e){if(S.top==S.base)return ERROR;e=*--S.top;return OK;}void Dispstack(SqStack S){if(S.top==S.base)return ERROR;printf("站里面的:\n");SElemType *p=S.base;while(p<S.top)printf("%d\n",*--S.top);}void main(){SqStack &S;Initstack(S);Getstack(S,1);Getstack(S,2);Getstack(S,1);Getstack(S,3);Getstack(S,4);Dispstack(S);}

Answer 1

Status Getstack(SqStack &S, SElemType e){ // 改&e 为：e, 这就允许你用常数调用。
main(){ SqStack S; // 改&S 为 S
if(S.top==S.base) exit(0); // 改掉 返回 return ERROR; 例如用 exit(0); 因为 void 函数体内 不能用 return 语句。