//创建的是一个以学生学号和成绩作为数据的链表。在此处只设立两个节点。
struct Student
{
long num;
float score;
struct Student *next;
}*p1,*p2;
struct Student *creat()
{
struct Student *head;
int n=0;
scanf("%ld,%f",&p1->num,&p1->score);
head=0;
while(p1->num!=0)
{
n=n+1;
if(n==1)
head=p1;
else
p2->next=p1;
p1=p2;
scanf("%ld,%f",&p1->num,&p1->score);
}
p2->next=0;
return(head);
}
问题是:\Program Files\Microsoft Visual Studio\MyProjects\zxc\123.cpp(12) : error C2065: 'scanf' : undeclared identifier
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