FILE *wj;
      char filename[100];
    printf("请输入要打开的以前信息文件的位置,如c:\\\\temp.txt:");
    fflush(stdin);
    scanf(" %s",filename);
    wj=fopen(filename,"r+");
    if ((wj=fopen(filename,"r+"))==NULL)
        {
        printf("打开文件%s出现错误\n",filename);   
        return 0;
    }
    printf("请输入保存了信息的学生的数量:");
             scanf("%d",&n);
             p=(struct student*)calloc(n,sizeof(struct student));
              if(p==NULL)
              {
                  printf("内存不足\n");
                  exit(0);
              }
    for(i=0;i<n;i++)
        {
            fscanf(wj, "%[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%[^,],%[^ ]",(p+i)->studentname,(p+i)->sex,(p+i)->studentid,(p+i)->year,(p+i)->month,(p+i)->day,(p+i)->dizhi,(p+i)->tp,(p+i)->mail);
              }     
              break;
        }
        TXT文件数据是这样的：
156465,f,231321,12,12634,212,152,1654654,21312313,1345
56456,m,23131,156,156416,2313,215415,123546,213156,1564654
1154,f,12345646,15,1545,321,15,2313,156456,231321
21354,f,545456,2,215,156,156,32132,5456456,231321
在执行fscanf会弹windows窗orz  求助

wj=fopen(filename,"r+");
if ((wj=fopen(filename,"r+"))==NULL)
↓
wj=fopen(filename,"r+");
if (wj==NULL)