该系统实现了对学生信息的存储和管理。学生信息包括学号、姓名、生日等信息。系统可以对学生信息进行查询、添加、删除和备份。
学生信息管理系统包含以下功能：
（1） 输入部分：通过键盘输入多位学生的学生信息。学生信息包含有：学生学号、姓名、性别、出生年月日、年龄、成绩；（信息要保存到一个文件里）
（2） 输出部分：输出显示已存储学生信息；
（3） 更新部分：
ChatGPT尝试为您解答，仅供参考
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 100
struct student
{
char id[50];
char name[50];
char gender[50];
char birth[50];
int age;
float score;
};
int main()
{
struct student students[MAX_STUDENTS];
int num_students = 0;
// 从文件中读取学生信息
FILE *fp;
fp = fopen("students.txt", "r");
if (fp != NULL)
{
char line[200];
while (fgets(line, sizeof(line), fp) != NULL)
{
sscanf(line, "%[^,],%[^,],%[^,],%[^,],%d,%f", students[num_students].id, students[num_students].name, students[num_students].gender, students[num_students].birth, &students[num_students].age, &students[num_students].score);
num_students++;
}
fclose(fp);
}
while (1)
{
printf("\nStudent Management System\n");
printf("1. Input students\n");
printf("2. Output students\n");
printf("3. Insert a student\n");
printf("4. Delete a student\n");
printf("5. Modify a student\n");
printf("6. Search students by name\n");
printf("7. Search students by id\n");
printf("8. Sort students by id\n");
printf("9. Sort students by score\n");
printf("10. Statistics\n");
printf("0. Exit\n");
printf("Enter your choice: ");
int choice;
scanf("%d", &choice);
if (choice == 0)
{
break;
}
switch (choice)
{
case 1:
{
// 输入学生信息
printf("\nEnter student information:\n");
while (1)
{
printf("Enter student id (Enter 0 to finish): ");
scanf("%s", students[num_students].id);
if (strcmp(students[num_students].id, "0") == 0)
{
break;
}
printf("Enter name: ");
scanf("%s", students[num_students].name);
printf("Enter gender: ");
scanf("%s", students[num_students].gender);
printf("Enter birthday (yyyy-mm-dd): ");
scanf("%s", students[num_students].birth);
printf("Enter age: ");
scanf("%d", &students[num_students].age);
printf("Enter score: ");
scanf("%f", &students[num_students].score);
num_students++;
}
break;
}
case 2:
{
// 输出学生信息
printf("\nStudent information:\n");
for (int i = 0; i < num_students; i++)
{
printf("Student ID: %s\n", students[i].id);
printf("Name: %s\n", students[i].name);
printf("Gender: %s\n", students[i].gender);
printf("Birthday: %s\n", students[i].birth);
printf("Age: %d\n", students[i].age);
printf("Score: %.2f\n", students[i].score);
}
break;
}
case 3:
{
// 插入学生信息
if (num_students < MAX_STUDENTS)
{
printf("\nEnter student information:\n");
printf("Enter student id: ");
scanf("%s", students[num_students].id);
printf("Enter name: ");
scanf("%s", students[num_students].name);
printf("Enter gender: ");
scanf("%s", students[num_students].gender);
printf("Enter birthday (yyyy-mm-dd): ");
scanf("%s", students[num_students].birth);
printf("Enter age: ");
scanf("%d", &students[num_students].age);
printf("Enter score: ");
scanf("%f", &students[num_students].score);
num_students++;
}
else
{
printf("\nError: Too many students!\n");
}
break;
}
case 4:
{
// 删除学生信息
printf("\nEnter student id to delete: ");
char id[50];
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].id, id) == 0)
{
found = 1;
for (int j = i; j < num_students - 1; j++)
{
students[j] = students[j + 1];
}
num_students--;
break;
}
}
if (!found)
{
printf("\nError: Student not found!\n");
}
break;
}
case 5:
{
// 修改学生信息
printf("\nEnter student id to modify: ");
char id[50];
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].id, id) == 0)
{
found = 1;
printf("Enter name: ");
scanf("%s", students[i].name);
printf("Enter gender: ");
scanf("%s", students[i].gender);
printf("Enter birthday (yyyy-mm-dd): ");
scanf("%s", students[i].birth);
printf("Enter age: ");
scanf("%d", &students[i].age);
printf("Enter score: ");
scanf("%f", &students[i].score);
break;
}
}
if (!found)
{
printf("\nError: Student not found!\n");
}
break;
}
case 6:
{
// 按姓名查询学生信息
printf("\nEnter name to search: ");
char name[50];
scanf("%s", name);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].name, name) == 0)
{
found = 1;
printf("Student ID: %s\n", students[i].id);
printf("Name: %s\n", students[i].name);
printf("Gender: %s\n", students[i].gender);
printf("Birthday: %s\n", students[i].birth);
printf("Age: %d\n", students[i].age);
printf("Score: %.2f\n", students[i].score);
}
}
if (!found)
{
printf("\nError: Student not found!\n");
}
break;
}
case 7:
{
// 按学号查询学生信息
printf("\nEnter id to search: ");
char id[50];
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].id, id) == 0)
{
found = 1;
printf("Student ID: %s\n", students[i].id);
printf("Name: %s\n", students[i].name);
printf("Gender: %s\n", students[i].gender);
printf("Birthday: %s\n", students[i].birth);
printf("Age: %d\n", students[i].age);
printf("Score: %.2f\n", students[i].score);
}
}
if (!found)
{
printf("\nError: Student not found!\n");
}
break;
}
case 8:
{
// 按学号排序学生信息
for (int i = 0; i < num_students - 1; i++)
{
for (int j = i + 1; j < num_students; j++)
{
if (strcmp(students[i].id, students[j].id) > 0)
{
struct student temp = students[i];
students[i] = students[j];
students[j] = temp;
}
}
}
break;
}
case 9:
{
// 按成绩排序学生信息
for (int i = 0; i < num_students - 1; i++)
{
for (int j = i + 1; j < num_students; j++)
{
if (students[i].score > students[j].score)
{
struct student temp = students[i];
students[i] = students[j];
students[j] = temp;
}
}
}
break;
}
case 10:
{
// 统计学生信息
printf("\nStatistics:\n");
printf("Number of students: %d\n", num_students);
int num_males = 0;
int num_females = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].gender, "male") == 0)
{
num_males++;
}
else if (strcmp(students[i].gender, "female") == 0)
{
num_females++;
}
}
printf("Number of males: %d\n", num_males);
printf("Number of females: %d\n", num_females);
int num_passed = 0;
int num_failed = 0;
for (int i = 0; i < num_students; i++)
{
if (students[i].score >= 60)
{
num_passed++;
}
else
{
num_failed++;
}
}
printf("Number of passed: %d\n", num_passed);
printf("Number of failed: %d\n", num_failed);
break;
}
default:
{
printf("\nError: Invalid choice!\n");
break;
}
}
}
// 将学生信息保存到文件中
fp = fopen("students.txt", "w");
if (fp != NULL)
{
for (int i = 0; i < num_students; i++)
{
fprintf(fp, "%s,%s,%s,%s,%d,%.2f\n", students[i].id, students[i].name, students[i].gender, students[i].birth, students[i].age, students[i].score);
}
fclose(fp);
}
return 0;
}
可做