#define NULL 0
struct student
{
long num;
char name[20];
float score[3];
struct student *next;
};
void main()
{
struct student *p,*head;
struct student a,b,c;
a.num=10036;a.name="xf";
b.num=10037;b.name="jbm";
c.num=10038;c.name="zz";
head=&a;
a.next=&b;
b.next=&c;
c.next=NULL;
p=head;
do
{
printf("%-5d%-6s",p->num,p->name);
p=p->next;
}
while(p!=NULL);
}

这样做也错？？？？

a.name="xf";这样在c语言中是不对的。字符串处理是c语言的弱项，用起来比较麻烦。
改成这样  strcpy(a.name, "xf");   加上头文件 #include <string.h>
另外 #define NULL 0    是多余的，有可能产生冲突

#include<stdio.h>
#include<string.h>
#define NULL 0
struct student
{
    long num;
    char name[20];
    float score[3];
    struct student *next;
};
int main(void)
{
    struct student *p,*head;
    struct student a,b,c;

    a.num=10036;strcpy(a.name,"xf");
    b.num=10037;strcpy(b.name,"jbm");
    c.num=10038;strcpy(c.name,"zz");
    head=&a;
    a.next=&b;
    b.next=&c;
    c.next=NULL;
    p=head;
    do
    {
        printf("%-5d%-6s",p->num,p->name);
        p=p->next;
    }
    while(p!=NULL);

    return 0;
}

    #include<stdio.h>
#define NULL 0
struct student
{
long num;
char name[20];
float score[3];
struct student *next;
};
void main()
{
struct student *p,*head;
struct student a={10036,"xf"},b={10037,"jbm"},c={10038,"zz"};
//a.num=10036;a.name="xf";不能给字符数组整体赋值，这样写是错的，也可以用strcpy(a.name, "xf");  加上头文件 #include <string.h>
//b.num=10037;b.name="jbm";
//c.num=10038;c.name="zz";
head=&a;
a.next=&b;
b.next=&c;
c.next=NULL;
p=head;
do
{
printf("%-5d%-6s",p->num,p->name);
p=p->next;
}
while(p!=NULL);
}

这个怎么这样啊　？？？我用了strcpy 还加了文件包含！