#include <stdio.h>
#include <stdlib.h>
void main ()
{
    FILE *fp;
    char ch1[5];
    char ch2[5];
    char ch3[5];
    int a,b;
    if((fp=fopen("Student.txt","r"))==NULL)
    {
        printf("Cannot open file strike any key exit!");
        getchar();
        exit(1);
    }
   
    while(!feof(fp))
    {
        fscanf(fp,"%d%s%s%d%s",&a,ch1,ch2,&b,ch3);
        printf("%5d%s%s%5d%s",a,ch1,ch2,b,ch3);
    }
   
    fclose(fp);
}//运行的是乱码，哪里出错了，求解

if((fp1=fopen("Sc.txt","r"))==NULL)
    {
        printf("can't open the Sc.txt file\n");
        getchar();
        exit(1);
    }
        while(p)
        {
            while(!feof(fp1))
            {
                if(m++==1)
                    fscanf(fp1,"%s%s%s",ch1,ch2,ch3);
                else
                {
                    fscanf(fp1,"%d%d%d",&a,&b,&c);
                    printf("%5d%5d%5d\n",a,b,c);
                    if(p->Sno==a)
                    {
                        p->Cno[i++]=b;
                        p->Grade[j++]=c;
                        printf("%5d%5d\n",p->Cno[i-1],p->Grade[i-1]);
                    }
                }
            }
                        rewind(fp1);//重新到文件的开头
            p=p->next;
            i=j=0;
        }
p是链表的头指针，执行第二次的外循环输出来文件的就是乱码。文件就是关于成绩学号什么的

改动这么大，以解决，谢了