c - 读取数据文件并存储到结构数组中

Question

我正在尝试读取数据文件并将信息存储到类(class)结构数组(或指向类(class)结构的指针数组)中。该作业需要使用指向学生结构的指针数组来维护数据库。

当我尝试将数据文件扫描到数组中时，出现段错误。如何正确地将文件中的信息存储到数组中？

#define SIZE        30
#define fieldLength 300
#define diskFile    "diskFile.dat"
#define courseFile  "course.dat"

struct student
{
    char name[fieldLength];
    int age[fieldLength]; 
    char course1[fieldLength];
    char course2[fieldLength];
    char remarks[fieldLength];      
}*sp[SIZE];

struct course 
{ 
    char name[fieldLength];
    char number[fieldLength];
    char instructor[fieldLength];
    char date[fieldLength];
    char starting[fieldLength];
    char ending[fieldLength];
    char location[fieldLength]; 
};

int main(int argc, char *argv[])
{
    int i, count;

    struct course course_arr[SIZE]; // an array of ten structs

    FILE * in; /*FILE pointer to do the stream IO*/
    in = fopen(courseFile, "r+");

    count = 0;
    while ((fscanf(in, "%s %s %s %s %s %s %s", 
                       &course_arr[count].name, 
                       &course_arr[count].number,
                       &course_arr[count].instructor, 
                       &course_arr[count].date, 
                       &course_arr[count].starting, 
                       &course_arr[count].ending, 
                       &course_arr[count].location)) != EOF)
    {       
        count++;        
    }

    /* print the menu */
    printf("\n-----------------------------------------------------------------\n");
    printf("|\t%-20s","(N)ew record");
    printf("%-20s","(U)pdate record");
    printf("Swa(p) records\t|\n");
    printf("|\t%-20s","(S)ort database");
    printf("%-20s","(C)lear database");
    printf("(D)isplay db\t|\n");

    printf("|\t%-20s","(L)oad disk");
    printf("%-20s","(W)rite disk");
    printf("(E)mpty disk\t|\n");

    printf("|\t%-20s", "(V)iew courses"); 
    printf("%-20s","(R)emove record");
    printf("(Q)uit   \t|\n");
    printf("-----------------------------------------------------------------\n");
    printf("choose one: ");

Answer 1

例程fscanf永远不会返回EOF。测试 fscanf 是否小于预期字段数:

count = 0;
while((fscanf(in, "%s %s %s %s %s %s %s", &course_arr[count].name, &course_arr[count].number, &course_arr[count].instructor, &course_arr[count].date, &course_arr[count].starting, &course_arr[count].ending, &course_arr[count].location)) < 7){
     count++;
}