C语言用数组写学生管理系统包括:退出,录入,显示,删除,查找,增加,排序,导入到文件,读取文件功能,结构体包括学号,性别,英语成绩,数学成绩,程序设计成绩,总分。
时间: 2023-12-04 12:01:40 浏览: 33
好的,下面是一个包含退出、录入、显示、删除、查找、增加、排序、导入到文件、读取文件功能的 C 语言代码,使用结构体数组实现:
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 100 // 最大学生数
#define MAX_NAME_LEN 20 // 最大姓名长度
#define FILE_NAME "students.dat" // 文件名
// 学生结构体
typedef struct {
int id; // 学号
char name[MAX_NAME_LEN + 1]; // 姓名
char sex; // 性别
float englishScore; // 英语成绩
float mathScore; // 数学成绩
float programmingScore; // 程序设计成绩
float totalScore; // 总分
} Student;
// 学生数组
Student students[MAX_STUDENTS];
int studentCount = 0; // 学生数量
// 添加学生
void addStudent() {
if (studentCount >= MAX_STUDENTS) { // 数组已满
printf("学生数量已达上限,无法添加新学生!\n");
return;
}
Student student;
printf("请输入学生学号:");
scanf("%d", &student.id);
printf("请输入学生姓名:");
scanf("%s", student.name);
printf("请输入学生性别(男/女):");
scanf("%s", &student.sex);
printf("请输入学生英语成绩:");
scanf("%f", &student.englishScore);
printf("请输入学生数学成绩:");
scanf("%f", &student.mathScore);
printf("请输入学生程序设计成绩:");
scanf("%f", &student.programmingScore);
student.totalScore = student.englishScore + student.mathScore + student.programmingScore;
students[studentCount++] = student;
printf("添加学生成功!\n");
}
// 显示所有学生信息
void showStudents() {
printf("学号\t姓名\t性别\t英语成绩\t数学成绩\t程序设计成绩\t总分\n");
for (int i = 0; i < studentCount; i++) {
printf("%d\t%s\t%c\t%.2f\t\t%.2f\t\t%.2f\t\t%.2f\n", students[i].id, students[i].name, students[i].sex, students[i].englishScore, students[i].mathScore, students[i].programmingScore, students[i].totalScore);
}
}
// 查找学生
void findStudent() {
int id;
printf("请输入要查找的学生学号:");
scanf("%d", &id);
for (int i = 0; i < studentCount; i++) {
if (students[i].id == id) {
printf("学号:%d,姓名:%s,性别:%c,英语成绩:%.2f,数学成绩:%.2f,程序设计成绩:%.2f,总分:%.2f\n", students[i].id, students[i].name, students[i].sex, students[i].englishScore, students[i].mathScore, students[i].programmingScore, students[i].totalScore);
return;
}
}
printf("未找到该学生!\n");
}
// 删除学生
void deleteStudent() {
int id;
printf("请输入要删除的学生学号:");
scanf("%d", &id);
for (int i = 0; i < studentCount; i++) {
if (students[i].id == id) {
for (int j = i; j < studentCount - 1; j++) {
students[j] = students[j + 1];
}
studentCount--;
printf("删除学生成功!\n");
return;
}
}
printf("未找到该学生!\n");
}
// 增加学生成绩
void addScore() {
int id;
printf("请输入要增加成绩的学生学号:");
scanf("%d", &id);
for (int i = 0; i < studentCount; i++) {
if (students[i].id == id) {
float englishScore, mathScore, programmingScore;
printf("请输入要增加的英语成绩:");
scanf("%f", &englishScore);
printf("请输入要增加的数学成绩:");
scanf("%f", &mathScore);
printf("请输入要增加的程序设计成绩:");
scanf("%f", &programmingScore);
students[i].englishScore += englishScore;
students[i].mathScore += mathScore;
students[i].programmingScore += programmingScore;
students[i].totalScore += englishScore + mathScore + programmingScore;
printf("增加成绩成功!\n");
return;
}
}
printf("未找到该学生!\n");
}
// 排序(按总分降序)
void sortStudents() {
for (int i = 0; i < studentCount - 1; i++) {
for (int j = 0; j < studentCount - 1 - i; j++) {
if (students[j].totalScore < students[j + 1].totalScore) {
Student temp = students[j];
students[j] = students[j + 1];
students[j + 1] = temp;
}
}
}
printf("排序成功!\n");
}
// 导入到文件
void saveStudentsToFile() {
FILE* fp = fopen(FILE_NAME, "wb");
if (fp == NULL) {
printf("无法打开文件!\n");
return;
}
fwrite(students, sizeof(Student), studentCount, fp);
fclose(fp);
printf("保存到文件成功!\n");
}
// 从文件读取
void loadStudentsFromFile() {
FILE* fp = fopen(FILE_NAME, "rb");
if (fp == NULL) {
printf("无法打开文件!\n");
return;
}
studentCount = fread(students, sizeof(Student), MAX_STUDENTS, fp);
fclose(fp);
printf("从文件读取成功!\n");
}
// 主菜单
void mainMenu() {
printf("\n学生管理系统\n");
printf("1. 录入学生信息\n");
printf("2. 显示所有学生信息\n");
printf("3. 查找学生\n");
printf("4. 删除学生\n");
printf("5. 增加学生成绩\n");
printf("6. 排序(按总分降序)\n");
printf("7. 导入到文件\n");
printf("8. 从文件读取\n");
printf("9. 退出\n");
printf("请输入操作序号:");
}
// 主函数
int main() {
int choice;
while (1) {
mainMenu();
scanf("%d", &choice);
switch (choice) {
case 1:
addStudent();
break;
case 2:
showStudents();
break;
case 3:
findStudent();
break;
case 4:
deleteStudent();
break;
case 5:
addScore();
break;
case 6:
sortStudents();
break;
case 7:
saveStudentsToFile();
break;
case 8:
loadStudentsFromFile();
break;
case 9:
printf("谢谢使用!\n");
return 0;
default:
printf("非法操作序号,请重新输入!\n");
break;
}
}
}
```
以上代码实现了一个完整的学生管理系统,包含了所有要求的功能。