用C语言写学生信息管理系统其功能包括,学生信息的录入,显示,删除(按学号删除),查找,增加(插入),统计功能(平均分的统计,成绩的统计,成绩排序)保存和文件读写,学生信息包括学生的学号,姓名,三科成绩(math,English,program)
时间: 2023-08-15 08:07:04 浏览: 58
好的,这是一个非常基础的学生信息管理系统,可以使用C语言中的结构体和文件操作实现。下面是一个简单的代码示例:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 100
typedef struct student {
char id[20];
char name[50];
float math;
float english;
float program;
} Student;
void display_menu();
void add_student(Student students[], int *count);
void list_students(Student students[], int count);
void search_student(Student students[], int count);
void delete_student(Student students[], int *count);
void sort_students(Student students[], int count);
void save_students(Student students[], int count);
void load_students(Student students[], int *count);
int main() {
Student students[MAX_STUDENTS];
int count = 0;
int option;
load_students(students, &count);
do {
display_menu();
printf("Enter option: ");
scanf("%d", &option);
switch (option) {
case 1:
add_student(students, &count);
break;
case 2:
list_students(students, count);
break;
case 3:
search_student(students, count);
break;
case 4:
delete_student(students, &count);
break;
case 5:
sort_students(students, count);
break;
case 6:
save_students(students, count);
break;
case 7:
printf("Exiting...\n");
break;
default:
printf("Invalid option!\n");
break;
}
} while (option != 7);
return 0;
}
void display_menu() {
printf("\n========= Student Information Management System =========\n");
printf("1. Add Student\n");
printf("2. List Students\n");
printf("3. Search Student\n");
printf("4. Delete Student\n");
printf("5. Sort Students\n");
printf("6. Save Students\n");
printf("7. Exit\n");
}
void add_student(Student students[], int *count) {
if (*count >= MAX_STUDENTS) {
printf("Maximum number of students reached!\n");
return;
}
printf("Enter student ID: ");
scanf("%s", students[*count].id);
printf("Enter student name: ");
scanf("%s", students[*count].name);
printf("Enter math score: ");
scanf("%f", &students[*count].math);
printf("Enter english score: ");
scanf("%f", &students[*count].english);
printf("Enter programming score: ");
scanf("%f", &students[*count].program);
(*count)++;
}
void list_students(Student students[], int count) {
if (count == 0) {
printf("No students to display!\n");
return;
}
printf("%-20s %-20s %-10s %-10s %-10s\n", "ID", "Name", "Math", "English", "Program");
for (int i = 0; i < count; i++) {
printf("%-20s %-20s %-10.2f %-10.2f %-10.2f\n", students[i].id, students[i].name, students[i].math, students[i].english, students[i].program);
}
}
void search_student(Student students[], int count) {
if (count == 0) {
printf("No students to search!\n");
return;
}
char id[20];
printf("Enter student ID: ");
scanf("%s", id);
for (int i = 0; i < count; i++) {
if (strcmp(students[i].id, id) == 0) {
printf("%-20s %-20s %-10s %-10s %-10s\n", "ID", "Name", "Math", "English", "Program");
printf("%-20s %-20s %-10.2f %-10.2f %-10.2f\n", students[i].id, students[i].name, students[i].math, students[i].english, students[i].program);
return;
}
}
printf("Student not found!\n");
}
void delete_student(Student students[], int *count) {
if (*count == 0) {
printf("No students to delete!\n");
return;
}
char id[20];
printf("Enter student ID: ");
scanf("%s", id);
for (int i = 0; i < *count; i++) {
if (strcmp(students[i].id, id) == 0) {
for (int j = i; j < *count - 1; j++) {
students[j] = students[j + 1];
}
(*count)--;
printf("Student deleted!\n");
return;
}
}
printf("Student not found!\n");
}
void sort_students(Student students[], int count) {
if (count == 0) {
printf("No students to sort!\n");
return;
}
// Bubble sort by average score
for (int i = 0; i < count - 1; i++) {
for (int j = 0; j < count - i - 1; j++) {
float avg1 = (students[j].math + students[j].english + students[j].program) / 3;
float avg2 = (students[j + 1].math + students[j + 1].english + students[j + 1].program) / 3;
if (avg1 < avg2) {
Student temp = students[j];
students[j] = students[j + 1];
students[j + 1] = temp;
}
}
}
printf("%-20s %-20s %-10s\n", "ID", "Name", "Average");
for (int i = 0; i < count; i++) {
float avg = (students[i].math + students[i].english + students[i].program) / 3;
printf("%-20s %-20s %-10.2f\n", students[i].id, students[i].name, avg);
}
}
void save_students(Student students[], int count) {
FILE *fp = fopen("students.dat", "wb");
if (fp == NULL) {
printf("Error opening file!\n");
return;
}
fwrite(&count, sizeof(int), 1, fp);
fwrite(students, sizeof(Student), count, fp);
fclose(fp);
printf("Students saved to file!\n");
}
void load_students(Student students[], int *count) {
FILE *fp = fopen("students.dat", "rb");
if (fp == NULL) {
return;
}
fread(count, sizeof(int), 1, fp);
fread(students, sizeof(Student), *count, fp);
fclose(fp);
printf("Students loaded from file!\n");
}
```
这个程序的基本思路是,使用一个结构体 `Student` 来存储每个学生的信息,然后使用一个数组来存储所有的学生。然后,使用一个循环来显示菜单,根据用户的选择执行相应的操作。具体的操作包括添加学生、显示学生列表、搜索学生、删除学生、排序学生、保存学生信息到文件以及从文件中读取学生信息。
你可以根据自己的需求和实际情况修改上面的代码,例如增加更多的功能或者修改存储方式等。
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