数据结构综合实验代码调试时出现很多问题

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

typedef struct student
{
    char num[12];
    int math;
    int eng;
    int chi;
    int geo;
    int bio;
    int chem;
    int average;
}stu;/*学生信息链表结构体*/

typedef struct qnode
{
    int data;
    struct qnode *next;
}LQNode;/*队列链表节点结构体*/

typedef struct                                                                          
{
    LQNode *front;                                 
    LQNode *rear;                                 
}LQueue;/*链式队列结构体*/

void create_score(stu *s)/*成绩生成函数,利用rand函数生成学生六门学科的成绩*/
{
    s->math = rand()%101;
    s->eng = rand()%101;
    s->chi = rand()%101;
    s->geo = rand()%101;
    s->bio = rand()%101;
    s->chem = rand()%101;
}

int student_number_input_count(FILE *fp1,stu *c)/*从文件读取数据并统计*/
{
    FILE *fp2 = fp1;
    int amount = 0;
    while(!feof(fp2)){
        fscanf(fp2,"%s\n\b",c->num);     /*第一个问题！！！！！我不管用fgets 还是fscan函数读取文本最后一个数据时总是有时正确有时不正确*/
        create_score(c);
        amount++;
        c++;
    }
    printf("数据输入完毕！\n\n");
    return amount;
}

void score_average(stu *c,int *score,int numOFstudent)/*计算每个学生各学科的平均分，并存入数组中*/
{
    int *average = score,num = numOFstudent;
    stu *p = c;

    while(1){
        if(num == 0)
            break;
        *average = (p->math + p->eng + p->chi + p->geo + p->bio + p->chem)/6;
        p->average = *average;
        average++;
        p++;
        num--;
    }
}

void QueueInitiate(LQueue *Q)/*队列初始化函数*/
{
    Q->rear = NULL;
    Q->front = NULL;
}

void QueueAppend(LQueue *Q, int x)/*入队列函数*/
{
     LQNode *p = (LQNode *)malloc(sizeof(LQNode));
     if(p == NULL){
         printf("QueueAppend内存申请失败!!!\n");
     }

    p->data = x;
    p->next = NULL;
   
    if(Q->front == NULL)
        Q->front = p;
    else
        Q->rear->next = p;
    Q->rear = p;
   
}

int QueueNotEmpty(LQueue Q)/*队列为空判断函数*/
{
    if(Q.front == NULL)
        return 0;
    else
        return 1;
}

int QueueDelete(LQueue *Q,int *d)/*出队列函数*/
{
    LQNode *p;

    if(Q->front == NULL){
         printf ("队列已空无数据元素出队列！ \n");
         return 0;
    }
    else{
      *d  = Q->front->data;
      p = Q->front;
      Q->front = Q->front->next;
      if(Q->front == NULL) Q->rear = NULL;
    }

      free(p);
      return 1;
}

void RadixSort(int *a,int n, int m,int d)/*基数排序函数*/
{
      int i, j, k, power = 1;
      LQueue *tub;
      tub = (LQueue *)malloc(sizeof (LQueue )* d);
      if(tub == NULL){
         printf("RadixSort内存申请失败!!!\n");
     }

      for(i = 0; i < d; i++)
          QueueInitiate(&tub[i]);                           
      for(i = 0; i < m; i++){
          if(i == 0)
              power = 1;
          else
                power = power *d;
          for(j = 0; j < n; j++){
              k = a[j] /power - (a[j] /(power * d)) * d;
              QueueAppend(&tub[k], a[j]);   
          }
         
          k = 0;
          for(j = 0; j < d; j++)
              while(QueueNotEmpty(tub[j]) != 0){
                  QueueDelete(&tub[j], &a[k]);
                  k++;
              }
      }
}

void ShellSort(int *a,int n,int d[],int numOfD)/*希尔排序函数*/
{
    int i, j, k, m, span;
    int temp;

    for(m = 0; m < numOfD; m++){
        span = d[m];
        for(k = 0;k < span;k++){
            for(i = k; i < n-span; i = i+ span){
            temp = a[i+span];
            j = i;
            while(j > -1 && temp > a[j]){
                    a[j+ span] = a[j];
                    j = j- span;
            }
            a[j+ span] = temp;
            }
        }
    }
}

void CreatHeap (int *a, int n, int h)/*堆创建函数*/
{
    int i, j, flag;
    int temp;

    i = h;   
    j = 2*i+1;
    temp = a[i];
    flag = 0;

    while(j < n && flag != 1)
    {
        if(j < n-1 && a[j] > a[j+1])
            j++;
        if(temp < a[j])
            flag = 1;
        else{
            a[i] = a[j];
            i = j;
            j = 2*i+1;
        }
        a[i] = temp;
    }
}

void InitCreatHeap(int *a,int n)/*堆初始化函数*/
{
    int i;
    for(i = (n-2)/2;i >= 0; i--)
        CreatHeap(a,n,i);
}

void Heapsort(int *a, int n)/*堆排序函数*/
{
    int i;
    int temp;
    InitCreatHeap(a, n);
    for(i = n-1; i > 0 ; i--)   
    {
        temp = a[0];
        a[0] = a[i];
        a[i] = temp;
        CreatHeap(a, i, 0);
    }
}

void Quicksort (int *a, int low, int high)
{
    int i = low, j = high;
    int temp = a[low];

    while(i < j){
        while(i < j && temp >= a[j])
            j--;
        if(i < j){
            a[i] = a[j];
            i++;
        }
        while(i < j && a[i] > temp)
            i++;
        if(i < j){
            a[j] = a[i];
            j--;
        }
    }

    a[i] = temp;
    if(low < i)
        Quicksort(a, low, i-1);
    if(i < high)
        Quicksort (a, j+1, high);
}

void print(stu *a,int *b,int num)/*打印学生成绩以及班内学生平均分*/
{
    int count = num;
    stu *a1 = a;
    int *b1 = b;
    while(count > 0){
        printf("学号:%s  生物:%d  化学:%d  语文:%d  英语:%d  地理:%d  数学:%d  平均分:%d\n\n",a1->num,a1->bio,a1->chem,a1->chi,a1->eng,a1->geo,a1->math,a1->average);
        a1++;
        count--;
    }
    printf("平均分:");
    while(count < num){
        printf(" %d ",*b1);
        b1++;
        count++;
    }
    printf("\n\n");
}

void main()
{
     FILE *class1_data = fopen("e:\\student_name1.txt","r");
    FILE *class2_data = fopen("e:\\student_name2.txt","r");
    FILE *class3_data = fopen("e:\\student_name3.txt","r");
    FILE *class4_data = fopen("e:\\student_name4.txt","r");
    if(class1_data != NULL && class2_data != NULL && class3_data != NULL && class4_data != NULL){
            printf("Succeed to open file!\n");
    }
    else{
        printf("Failed to open file!\n");
    }
    stu *class1 = (stu *)calloc(sizeof(stu),1);                      /*班级学生信息链表*/
    int *class1_average = (int *)calloc(sizeof(int),1);             /*班级各学生平均分数组*/
    int class1_amount;                                             /*班级学生人数*/
    class1_amount = student_number_input_count(class1_data,class1);
    score_average(class1,class1_average,class1_amount);

    stu *class2 = (stu *)calloc(sizeof(stu),1);
    int *class2_average = (int *)calloc(sizeof(int),1);
    int class2_amount;
    class2_amount = student_number_input_count(class2_data,class2);
    score_average(class2,class2_average,class2_amount);

    stu *class3 = (stu *)calloc(sizeof(stu),1);
    int *class3_average = (int *)calloc(sizeof(int),1);
    int class3_amount;
    class3_amount = student_number_input_count(class3_data,class3);
    score_average(class3,class3_average,class3_amount);

    stu *class4 = (stu *)calloc(sizeof(stu),1);
    int *class4_average = (int *)calloc(sizeof(int),1);
    int class4_amount;
    class4_amount = student_number_input_count(class4_data,class4);
    score_average(class4,class4_average,class4_amount);

   

    double start, stop;              /*第四个问题！！！！！！！！！！  大概运行到这里是就会发生变量数值改变的情况*/
label:printf("****************************************************************\n");
    printf("1-快速排序  2-基数排序  3-堆排序  4-希尔排序  5-查看  0-退出程序");
    printf("\n****************************************************************\n\n");
    int select;
    int d[] = {1,3,6};
    printf("*********************************************\n");
    printf("               请输入功能序号:");
    scanf("%d",&select);
    printf("*********************************************\n");

    switch(select)
    {
    case 0:
        /*fclose(p1);fclose(p2);
        fclose(p3);fclose(p4);*/                  /*第二个问题！！！！！！！！！！！！！  fclose函数一用就触发断点*/
        exit(0);
    case 1:
        start = clock();
        Quicksort(class1_average,0,class1_amount-1);
        Quicksort(class2_average,0,class2_amount-1);
        Quicksort(class3_average,0,class3_amount-1);
        Quicksort(class4_average,0,class4_amount-1);
        stop = clock();
        printf("\n\n排序完成！用时:%lf毫秒\n\n",stop-start);start = 0;stop = 0;break;
    case 2:
        start = clock();
        RadixSort(class1_average,class1_amount,2,10);
        RadixSort(class2_average,class2_amount,2,10);
        RadixSort(class3_average,class3_amount,2,10);
        RadixSort(class4_average,class4_amount,2,10);
        stop = clock();
        printf("\n\n排序完成！用时:%lf毫秒\n\n",stop-start);
        start = 0;stop = 0;break;
    case 3:
        start = clock();
        Heapsort(class1_average,class1_amount);
        Heapsort(class2_average,class2_amount);
        Heapsort(class3_average,class3_amount);
        Heapsort(class4_average,class4_amount);
        stop = clock();
        printf("\n\n排序完成！用时:%lf毫秒\n\n",stop-start);
        start = 0;stop = 0;break;
    case 4:
        start = clock();
        ShellSort(class1_average,class1_amount,d,3);
        ShellSort(class2_average,class2_amount,d,3);
        ShellSort(class3_average,class3_amount,d,3);
        ShellSort(class4_average,class4_amount,d,3);
        stop = clock();
        printf("\n\n排序完成！用时:%lf毫秒\n\n",stop-start);
        start = 0;stop = 0;break;
    case 5:
        print(class1,class1_average,class1_amount);
        print(class2,class2_average,class2_amount);
        print(class3,class3_average,class3_amount);
        print(class4,class4_average,class4_amount);break;
    default:printf("输入错误，请重试");break;
    }
    system("pause");
    printf("/n");
    system("cls");
    goto label;
   
}