关于C语言结构体指针的问题，求大神回答....

在

c1=(order*)malloc(sizeof(order));
   c2=(goods*)malloc(sizeof(goods));
   c3=(customer*)malloc(sizeof(customer));

下面添加

c1->a=(goods*)malloc(sizeof(goods));
   c1->c=(customer*)malloc(sizeof(customer));

因为你虽然为c1，c2，c3分配了空间，但是没有为c1中的good *a和customer *c分配空间

void main()
{
order *c1;
goods *c2;
customer *c3;
c1=(order*)malloc(sizeof(order));
c2=(goods*)malloc(sizeof(goods));
c3=(customer*)malloc(sizeof(customer));
c1->a=c2;//结构体的成员指针没有初始化赋值，指向不明
c1->c=c3;
printf("please inlput:\n");
scanf("%s%f%s",c1->a->number,&(c1->a->price),c1->c->Tel);
printf("%5s %6.1f %5s",c1->a->number,c1->a->price,c1->c->Tel);
}