当用fscanf从文本文件中读取数据时，下一列的数据会被追加到字符串数据中。如何只获取该列的数据？
输入文件：student.txt

Donald 23 KOR CE
Mitchell 24 USA EE
John 22 KOR CE

输出：

Donald 23 KORCE CE
Mitchell 24 USAEE EE
John 22 KORCE CE

在第一行的数据中，国家应该是KOR，但结果却是KORCE。
我的代码到目前为止：

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

#define MAX_LINE_LENGTH 100

typedef struct
{
  char name[20];
  int age;
  char country[3];
  char dept[2];
} STUDENT;

int main()
{
  int i = 0;
  STUDENT student[15];

  // Initialize the student array
  for (i = 0; i < 15; i++) {
    memset(student[i].name, 0, sizeof(student[i].name));
    student[i].age = 0;
    memset(student[i].country, 0, sizeof(student[i].country));
    memset(student[i].dept, 0, sizeof(student[i].dept));
  }

  // Open the file for reading
  FILE *fp = fopen("student.txt", "r");
  if (fp == NULL)
  {
    puts("Error: Could not open file 'student.txt'");
    return 1;
  }

  // Read the file line by line
  char line[MAX_LINE_LENGTH];
  while (fgets(line, MAX_LINE_LENGTH, fp) != NULL) {
    // Parse the line and fill the structure
    if (sscanf(line, "%s %d %s %s\n", student[i].name, &student[i].age, student[i].country, student[i].dept) != 4) {
      printf("Error: Invalid data in file 'student.txt'\n");
      return 1;
    }

    // Print the structure
    printf("Name: %s\n", student[i].name);
    printf("Age: %d\n", student[i].age);
    printf("Country: %s\n", student[i].country);
    printf("Dept: %s\n", student[i].dept);

    i++;
  }

  // Close the file
  fclose(fp);

  return 0;
}

我希望国家/地区名称正常读取为3个字符。