结构体中有char和int，如何让系统区分char和后面的int？

Zhang_Yanzhen 2018-02-11 08:30:31

C语言代码运行的时候，char在int前面，输入数据的时候“,12”被归入char，而int部分数据，求各位大神指点一下。

代码如下：
#include<stdio.h>
#include<stdlib.h>

struct student
{
long num;
char name[20];
int old;
struct student *next;
};

typedef struct student List;

List* creatlist();
List* insertlist(List *h,List *s);
List* deletelist(List *h,long num);
void displist(List *h);

void main()
{
List *h,*p;
long num;

h=creatlist();
printf("学号姓名年龄：\n");
displist(h);

printf("输入要插入的节点元素：\n");
p=(List*)malloc(sizeof(List));
scanf("%d,%s,%d",&p->num,p->name,p->old);
h=insertlist(h,p);
printf("学号姓名年龄：\n");
displist(h);

printf("输入一个要删除节点的学号:\n");
scanf("%d",&num);
h=deletelist(h,num);
printf("学号姓名年龄：\n");
displist(h);
}

List* creatlist()
{
List *h,*pre,*p;
int i,n;
h=NULL;
printf("请输入创建链表个数：\n");
scanf("%d\n",&n);
for(i=0;i<n;i++)
{
p=(List*)malloc(sizeof(List));
p->next=NULL;
if(h==NULL)
{
h=p;
}
else
{
pre=p->next;
}
scanf("%d,%s,%d",&p->num,p->name,p->old);
pre=p;
}
return h;
}

List* insertlist(List *h,List *s)
{
List *pre,*p;
p=h;
if(h==NULL)
{
h=s;
s->next=NULL;
}
else
{
while((s->num>p->num)&&(p->next!=NULL))
{
pre=p;
p=p->next;
}

if(s->num<=p->num)
{
if(h==p)
{
h=s;
s->next=p;
}
else
{
pre->next=s;
s->next=p;
}
}
else
{
p->next=s;
s->next=NULL;
}
}
return h;
}

List* deletelist(List *h,long num)
{
List *pre,*p;
if(h==NULL)
{
printf("链表为空，删除失败！\n");
return 0;
}

p=h;
while(p->num!=num&&p->next!=NULL)
{
pre=p;
p=p->next;
}

if(p->num=num)
{
if(p==h)
h=p->next;
else
pre->next=p->next;
free(p);
printf("成功删除！\n");
}
else
printf("没有找到要删除的节点。\n");

return h;
}

void displist(List *h)
{
List *p=h;
while(p!=NULL)
{
printf("%d %s %d\n",p->num,p->name,p->old);
p=p->next;
}
}

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