以下程序利用结构体指针输出一组化学元素名称及其原子量。请改正程序中的错误。
 struct  list
 { int  i;
   char  name[4];
   float  w;
 }tab[4]={{1,"H",1.008}, {2,"He",4.0026}, {3,"Li",6.941}, {4,"Be",9.01218}};
# include “stdio.h”
void main( )
{ struct *p;
  printf("No\tName\tAtomic Weight\n");
  for (p=tab; p<4; p++)
    printf("%d\t %s\t %f\n",
               p->i, p->name, p->w);
 }
我是这样改的为什么不对呢？
以下程序利用结构体指针输出一组化学元素名称及其原子量。请改正程序中的错误。
 struct  list
 { int  i;
   char  name[4];
   float  w;
 }tab[4]={{1,"H",1.008}, {2,"He",4.0026}, {3,"Li",6.941}, {4,"Be",9.01218}};
# include “stdio.h”
void main( )
{ struct list*p=tab;
  printf("No\tName\tAtomic Weight\n");
  for (p=tab; p<4; p++)
    printf("%d\t %s\t %f\n",
               p->i, p->name, p->w);
 }

楼主估计你这句for (p=tab; p<4; p++)有问题，改为下句试试：
for (p=&tab[0]; p<=&tab[3]; p++)

还有struct list *p=&tab;这样才对……

下面是在DEV C++下编译成功的：代码如下：
struct  list
{
        int  i;
        char  name[4];
        float  w;
}tab[4]={{1,"H",1.008}, {2,"He",4.0026}, {3,"Li",6.941}, {4,"Be",9.01218}};
# include <stdio.h>
int main(void)
{  
    struct list *p;
    printf("No\tName\tAtomic Weight\n");
    for (p=&tab[0]; p<=&tab[3]; p++)
    {
        printf("%d\t %s\t %f\n", p->i, p->name, p->w);
    }
    getchar();
    return 0;
}

struct  list
 { int  i;
    char  name[4];
    double  w;
 }tab[4]={{1,"H",1.008}, {2,"He",4.0026}, {3,"Li",6.941}, {4,"Be",9.01218}};
 # include <stdio.h>
 void main( )
 {
     struct list *p;
     int i=0;
   printf("No\tName\tAtomic Weight\n");
   for (p=tab; i<4; p++)
   {
     printf("%d\t %s\t %f\n",
               p->i, p->name, p->w);
     i++;
   }

 }
这是我修改的  不知道合不合要求

# include “stdio.h”\\\\\\\\\\\\\这里应该是"stdio.h"
void main( )
{ struct list*p=tab;\\\\\\\\\\\\\\\\\\这里应该有个空格struct list *p=tab;这就说明你已经把结构体指针指向结构体数组的首地址了 相当于struct list *p=&tab[0];
  printf("No\tName\tAtomic Weight\n");
  for (p=tab; p<4; p++)\\\\\\\\\\\\这里第一个条件就不用写了 第二个条件写成p<=&tab[3]
    printf("%d\t %s\t %f\n",
               p->i, p->name, p->w);
}