c语言 实现从文本中读取出指定学号的学生信息并显示，文本文件存放格式是每一行对应一个学生信息，最后一行没有换行符

以下是使用C语言实现从文本中读取出指定学号的学生信息并显示的示例代码：

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

#define MAX_LENGTH 100

typedef struct {
    char name[MAX_LENGTH];
    int age;
    int studentID;
    float averageScore;
} Student;

void readStudentInfoFromFile(const char* filename, Student* students, int* numStudents) {
    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        printf("Failed to open the file.\n");
        return;
    }

    char line[MAX_LENGTH];
    *numStudents = 0;

    while (fgets(line, sizeof(line), file)) {
        sscanf(line, "%s %d %d %f", students[*numStudents].name, &students[*numStudents].age, &students[*numStudents].studentID, &students[*numStudents].averageScore);
        (*numStudents)++;
    }

    fclose(file);
}

void displayStudentInfo(const Student* students, int numStudents, int studentID) {
    int i;
    for (i = 0; i < numStudents; i++) {
        if (students[i].studentID == studentID) {
            printf("Name: %s\n", students[i].name);
            printf("Age: %d\n", students[i].age);
            printf("Student ID: %d\n", students[i].studentID);
            printf("Average Score: %.2f\n", students[i].averageScore);
            return;
        }
    }

    printf("Student with ID %d not found.\n", studentID);
}

int main() {
    const char* filename = "student_info.txt";
    Student students[MAX_LENGTH];
    int numStudents;

    readStudentInfoFromFile(filename, students, &numStudents);

    int studentID;
    printf("Enter the student ID: ");
    scanf("%d", &studentID);

    displayStudentInfo(students, numStudents, studentID);

    return 0;
}