c - 如何将字符串和整数添加到数组然后打印到文本文件

Question

早上好，当我输入学生的名字时，程序立即崩溃。另外，我不太确定如何将名称和 ID 添加到数组中以打印到文本文件。我可以帮忙吗？

struct records{
    int id;
    char fname[15];
    char lname[15];
    };
struct records student;


 int max=1000;
        int i;
        srand( time(NULL) ); //random numbers generated
        ATND= fopen("Student Record.txt","a");
        if(ATND== NULL){
            printf("ERROR!");       
            exit(1);
        }
        for(i=0; i<100; i++){
        printf("Enter student\'s first name: ");
        scanf("%s", student.fname[i]);

        printf("\n\n");
        printf("Enter student\'s last name: ");
        scanf("%s", student.lname[i]);

        /*randomnumber*/student.id[i]=rand() %max + 39048543;

        fprintf(ATND,"%s %s %d", student.fname[i], student.lname[i], student.id[i]);
    }
        fclose(ATND);

Answer 1

代码仅提供 1 条记录的数据空间，而它似乎需要 1000 条记录。其他问题的数量。怀疑10个小时后，OP已经完成了其中的一些

//Definition - good
struct records {
  int id;
  char fname[15];  // IMO 15 is too limiting for first and last
  char lname[15];
};

// Only 1 student, need many more
// struct records student;
#define STUDENT_N 1000
struct records student[STUDENT_N];

void read_records(void) {
  // avoid magic numbers
  // int max = 1000;
  int max = STUDENT_N;

  int i;
  srand(time(NULL)); //random numbers generated

  // ATND not declared
  FILE *ATND;

  ATND = fopen("Student Record.txt", "a");
  if (ATND == NULL) {
    printf("ERROR!");
    exit(1);
  }

  char buf[100];

  // avoid magic numbers
  // for (i = 0; i < 100; i++) {
  for (i = 0; i < STUDENT_N; i++) {

    printf("Enter student\'s first name: ");
    // don't use scanf()
    // scanf("%s", student.fname[i]);
    if (fgets(buf, sizeof buf, stdin) == NULL) break;
    if (sscanf(buf, "%14s", student[i].fname) != 1) break;

    printf("\n\n");
    printf("Enter student\'s last name: ");
    // Add flush to insure buffered prompts that do not end in \n are sent
    fflush(stdout);

    // scanf("%s", student.lname[i]);
    if (fgets(buf, sizeof buf, stdin) == NULL) break;
    if (sscanf(buf, "%14s", student[i].lname) != 1) break;

    // /*randomnumber*/student.id[i] = rand() % max + 39048543;
    /*randomnumber*/student[i].id = rand() % max + 39048543;

    // Do not index the name, index the structure
    // fprintf(ATND, "%s %s %d", student.fname[i], student.lname[i],    student.id[i]);
    fprintf(ATND, "%s %s %d", student[i].fname, student[i].lname,  student[i].id);
  }
  fclose(ATND);
}