学生信息管理系统，要用c或者c++
要用结构体,来显示所有学生的信息
要有录入，查询，排序，删除等这些功能
感谢|
这个我有
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 100
// 学生结构体
typedef struct {
char id[20];
char name[50];
char gender[10];
char clas[20];
float scores[3];
float averageScore;
float totalScore;
float maxScore;
float minScore;
} Student;
// 全局学生数组和学生数量
Student students[MAX_STUDENTS];
int studentCount = 0;
// 辅助函数声明
int findStudentIndexById(const char* id);
void printStudent(const Student* student);
void printAllStudents();
void addStudent();
void deleteStudent();
void modifyStudent();
void searchStudent();
void sortStudents();
void groupStudents();
int main() {
int choice;
while (1) {
printf("\n----------- 学生信息管理系统 -----------\n");
printf("1. 显示所有学生信息\n");
printf("2. 录入学生信息\n");
printf("3. 删除学生信息\n");
printf("4. 修改学生信息\n");
printf("5. 查询学生信息\n");
printf("6. 排序学生信息\n");
printf("7. 分组学生信息\n");
printf("0. 退出系统\n");
printf("---------------------------------------\n");
printf("请输入要进行的操作（0-7）：");
scanf("%d", &choice);
switch (choice) {
case 1:
printAllStudents();
break;
case 2:
addStudent();
break;
case 3:
deleteStudent();
break;
case 4:
modifyStudent();
break;
case 5:
searchStudent();
break;
case 6:
sortStudents();
break;
case 7:
groupStudents();
break;
case 0:
printf("感谢使用学生信息管理系统！\n");
exit(0);
default:
printf("无效的选择，请重新输入！\n");
break;
}
}
return 0;
}
// 根据学号查找学生在数组中的索引
int findStudentIndexById(const char* id) {
for (int i = 0; i < studentCount; i++) {
if (strcmp(students[i].id, id) == 0) {
return i;
}
}
return -1;
}
// 打印学生信息
void printStudent(const Student* student) {
printf("学号：%s\n", student->id);
printf("姓名：%s\n", student->name);
printf("性别：%s\n", student->gender);
printf("班级：%s\n", student->clas);
printf("学科成绩：\n");
printf(" 语文：%.2f\n", student->scores[0]);
printf(" 数学：%.2f\n", student->scores[1]);
printf(" 英语：%.2f\n", student->scores[2]);
printf("平均成绩：%.2f\n", student->averageScore);
printf("总成绩：%.2f\n", student->totalScore);
printf("最高成绩：%.2f\n", student->maxScore);
printf("最低成绩：%.2f\n", student->minScore);
printf("\n");
}
// 打印所有学生信息
void printAllStudents() {
printf("\n=========== 所有学生信息 ===========\n");
for (int i = 0; i < studentCount; i++) {
printStudent(&students[i]);
}
printf("共%d名学生\n", studentCount);
printf("===================================\n");
}
// 录入学生信息
void addStudent() {
if (studentCount >= MAX_STUDENTS) {
printf("学生信息已达到上限，无法继续添加！\n");
return;
}
Student newStudent;
printf("\n请输入学号：");
scanf("%s", newStudent.id);
// 检查学号是否已存在
if (findStudentIndexById(newStudent.id) != -1) {
printf("学号已存在，请重新输入！\n");
return;
}
printf("请输入姓名：");
scanf("%s", newStudent.name);
printf("请输入性别：");
scanf("%s", newStudent.gender);
printf("请输入班级：");
scanf("%s", newStudent.clas);
printf("请输入语文成绩：");
scanf("%f", &newStudent.scores[0]);
printf("请输入数学成绩：");
scanf("%f", &newStudent.scores[1]);
printf("请输入英语成绩：");
scanf("%f", &newStudent.scores[2]);
// 计算平均成绩、总成绩、最高成绩和最低成绩
newStudent.totalScore = newStudent.scores[0] + newStudent.scores[1] + newStudent.scores[2];
newStudent.averageScore = newStudent.totalScore / 3.0;
newStudent.maxScore = newStudent.scores[0];
newStudent.minScore = newStudent.scores[0];
for (int i = 1; i < 3; i++) {
if (newStudent.scores[i] > newStudent.maxScore) {
newStudent.maxScore = newStudent.scores[i];
}
if (newStudent.scores[i] < newStudent.minScore) {
newStudent.minScore = newStudent.scores[i];
}
}
// 将新学生信息添加到数组中
students[studentCount] = newStudent;
studentCount++;
printf("学生信息添加成功！\n");
}
// 删除学生信息
void deleteStudent() {
char id[20];
printf("\n请输入要删除的学生学号：");
scanf("%s", id);
int index = findStudentIndexById(id);
if (index == -1) {
printf("未找到学号为%s的学生！\n", id);
return;
}
// 将要删除的学生信息从数组中移除
for (int i = index; i < studentCount - 1; i++) {
students[i] = students[i + 1];
}
studentCount--;
printf("学生信息删除成功！\n");
}
// 修改学生信息
void modifyStudent() {
char id[20];
printf("\n请输入要修改的学生学号：");
scanf("%s", id);
int index = findStudentIndexById(id);
if (index == -1) {
printf("未找到学号为%s的学生！\n", id);
return;
}
Student* student = &students[index];
printf("学号：%s\n", student->id);
printf("姓名：%s\n", student->name);
printf("性别：%s\n", student->gender);
printf("班级：%s\n", student->clas);
printf("学科成绩：\n");
printf(" 语文：%.2f\n", student->scores[0]);
printf(" 数学：%.2f\n", student->scores[1]);
printf(" 英语：%.2f\n", student->scores[2]);
printf("平均成绩：%.2f\n", student->averageScore);
printf("总成绩：%.2f\n", student->totalScore);
printf("最高成绩：%.2f\n", student->maxScore);
printf("最低成绩：%.2f\n", student->minScore);
printf("\n请输入新的学生信息：\n");
printf("请输入姓名：");
scanf("%s", student->name);
printf("请输入性别：");
scanf("%s", student->gender);
printf("请输入班级：");
scanf("%s", student->clas);
printf("请输入语文成绩：");
scanf("%f", &student->scores[0]);
printf("请输入数学成绩：");
scanf("%f", &student->scores[1]);
printf("请输入英语成绩：");
scanf("%f", &student->scores[2]);
// 更新平均成绩、总成绩、最高成绩和最低成绩
student->totalScore = student->scores[0] + student->scores[1] + student->scores[2];
student->averageScore = student->totalScore / 3.0;
student->maxScore = student->scores[0];
student->minScore = student->scores[0];
for (int i = 1; i < 3; i++) {
if (student->scores[i] > student->maxScore) {
student->maxScore = student->scores[i];
}
if (student->scores[i] < student->minScore) {
student->minScore = student->scores[i];
}
}
printf("学生信息修改成功！\n");
}
// 查找学生信息
void searchStudent() {
char id[20];
printf("\n请输入要查找的学生学号：");
scanf("%s", id);
int index = findStudentIndexById(id);
if (index == -1) {
printf("未找到学号为%s的学生！\n", id);
return;
}
printf("\n=========== 查找到的学生信息 ===========\n");
printStudent(&students[index]);
printf("=======================================\n");
}
// 根据平均成绩排序学生信息
void sortStudents() {
for (int i = 0; i < studentCount - 1; i++) {
for (int j = 0; j < studentCount - i - 1; j++) {
if (students[j].averageScore < students[j + 1].averageScore) {
Student temp = students[j];
students[j] = students[j + 1];
students[j + 1] = temp;
}
}
}
printf("学生信息排序成功！\n");
}
// 分组学生信息
void groupStudents() {
int groupCount;
printf("\n请输入要分组的组数：");
scanf("%d", &groupCount);
if (groupCount <= 0 || groupCount > studentCount) {
printf("无效的组数，请重新输入！\n");
return;
}
int studentsPerGroup = studentCount / groupCount;
int remainingStudents = studentCount % groupCount;
int startIndex = 0;
for (int i = 0; i < groupCount; i++) {
int endIndex = startIndex + studentsPerGroup;
if (remainingStudents > 0) {
endIndex++;
remainingStudents--;
}
printf("\n=========== 第%d组学生信息 ===========\n", i + 1);
for (int j = startIndex; j < endIndex; j++) {
printStudent(&students[j]);
}
printf("======================================\n");
startIndex = endIndex;
}
}
#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
#include <string.h>
struct Student //创建学生信息结构体
{ //每个学生对应一个结构体
char ID[20]; //学号
char Name[10]; //姓名
float Score1; //英语成绩
float Score2; //数学成绩
float Score3; //语文成绩
float Score4; //程序设计成绩
float All; //总分
float Average; //平均成绩
} students[1000];
int num = 0; //计数器
void Copy(struct Student *arr, int i, int j)
{
strcpy(arr[i].ID, arr[j].ID);
strcpy(arr[i].Name, arr[j].Name);
arr[i].Score1 = arr[j].Score1;
arr[i].Score2 = arr[j].Score2;
arr[i].Score3 = arr[j].Score3;
arr[i].Score4 = arr[j].Score4;
arr[i].All = arr[j].All;
arr[i].Average = arr[j].Average;
}
int Student_SearchByName(char name[]) //通过姓名来检索学生
{
int i;
for (i = 0; i < num; i++)
{
if (strcmp(students[i].Name, name) == 0) //通过strcmp函数来对比学生姓名，找到返回在数组的位置
{
return i;
}
}
return -1; //未找到返回 -1
}
int Student_SearchByIndex(char id[]) //通过学号来检索学生信息
{
int i;
for (i = 0; i < num; i++)
{
if (strcmp(students[i].ID, id) == 0) //通过strcmp函数来对比学生id，找到返回位置
{
return i;
}
}
return -1; //未找到返回 -1
}
void Student_DisplaySingle(int index) //输出表头
{
printf("%10s%10s%8s%8s%8s%10s\n", "学号", "姓名", "英语", "数学", "语文", "程序设计", "总成绩", "平均成绩");
printf("-------------------------------------------------------------\n");
printf("%10s%10s%8.2f%8.2f%8.2f%8.2f%10.2f%10.2f\n", students[index].ID, students[index].Name,students[index].Score1, students[index].Score2, students[index].Score3, students[index].Score4, students[index].All, students[index].Average);
}
void InputStudent() //利用循环录入学生信息
{
while (1)
{
printf("请输入学号:");
scanf("%s", &students[num].ID);
getchar();
printf("请输入姓名:");
scanf("%s", &students[num].Name);
getchar();
printf("请输入成绩:");
scanf("%f", &students[num].Score1);
getchar();
printf("请输入成绩:");
scanf("%f", &students[num].Score2);
getchar();
printf("请输入成绩:");
scanf("%f", &students[num].Score3);
getchar();
printf("请输入成绩:");
scanf("%f", &students[num].Score4); //依次输入各项数据
getchar();
students[num].All = students[num].Score1 + students[num].Score2 + students[num].Score3 + students[num].Score4; //输完数据后自动计算总成绩与平均成绩
students[num].Average = (students[num].Score1 + students[num].Score2 + students[num].Score3 + students[num].Score4) / 4;
if (Student_SearchByIndex(students[num].ID) == -1)
{
num++; //移向下一个位置
}
else
{
printf("学号重复，输入数据无效 !\n");
}
printf("是否继续?(y/n):>");
if (getchar() == 'n')
{
break;
}
}
}
void ModifyStudent() //修改学生成绩
{
while (1)
{
char id[20];
int index;
printf("请输入要修改的学生的学号:");
scanf("%s", &id);
getchar();
index = Student_SearchByIndex(id); //调用搜查id函数，根据其返回值确定位置
if (index == -1)
{
printf("学生不存在!\n");
}
else
{
printf("你要修改的学生信息为:\n");
Student_DisplaySingle(index);
printf("-- 请输入新值--\n");
printf("请输入学号:");
scanf("%s", &students[index].ID);
getchar();
printf("请输入姓名:");
scanf("%s", &students[index].Name);
getchar();
printf("请输入英语成绩:");
scanf("%f", &students[index].Score1);
getchar();
printf("请输入数学成绩:");
scanf("%f", &students[index].Score2);
getchar();
printf("请输入语文成绩:");
scanf("%f", &students[index].Score3);
getchar();
printf("请输入程序设计成绩:");
scanf("%f", &students[index].Score4); //重新录入一套新的数据替代
getchar();
students[index].All = students[index].Score1 + students[index].Score2 + students[index].Score3 + students[index].Score4;
students[index].Average = (students[index].Score1 + students[index].Score2 + students[index].Score3 + students[index].Score4) / 4;
}
printf("是否继续?(y/n):>");
if (getchar() == 'n')
{
break;
}
}
}
void DeleteStudent() //删除学生信息
{
int i;
while (1)
{
char id[20];
int index;
printf("请输入要删除的学生的学号:");
scanf("%s", &id);
getchar();
index = Student_SearchByIndex(id); //调用搜查id函数，根据其返回值确定位置
if (index == -1)
{
printf("该学生不存在!\n");
}
else
{
printf("你要删除的学生信息为:\n");
Student_DisplaySingle(index);
printf("是否真的要删除?(y/n)");
if (getchar() == 'y')
{
for (i = index; i < num - 1; i++)
{
Copy(students, i, i + 1);
// students[i]=students[i+1]; //把后边的对象都向前移动
}
num--;
}
getchar();
}
printf("是否继续?(y/n):>");
if (getchar() == 'n')
{
break;
}
}
}
void display() //打印已录入的学生信息
{
int a;
printf("%10s%10s%8s%8s%8s%8s%10s%10s\n", "学号", "姓名", "英语", "数学", "语文", "程序设计", "总成绩", "平均成绩");
printf("-------------------------------------------------------------------------\n");
for (a = 0; a < num; a++)
{
printf("%10s%10s%8.2f%8.2f%8.2f%8.2f%10.2f%10.2f\n", students[a].ID, students[a].Name,
students[a].Score1, students[a].Score2, students[a].Score3, students[a].Score4, students[a].All, students[a].Average);
}
}
void InsertStudent() //指定位置插入学生信息
{
int a, b, c;
printf("请输入你要插入的位置");
scanf("%d", &a);
if (a > num)
{
printf("输入的位置有误，请重新输入,当前共%d条数据\n", num);
scanf("%d", &a);
}
b = num - 1;
for (; b >= a - 1; b--)
{
// strcpy(students[b+1].ID,students[b].ID);
// strcpy(students[b+1].Name,students[b].Name);
// students[b+1].Score1=students[b].Score1;
// students[b+1].Score2=students[b].Score2;
// students[b+1].Score3=students[b].Score3;
// students[b+1].Score4=students[b].Score4;
// students[b+1].All=students[b].All;
// students[b+1].Average=students[b].Average;
Copy(students, b + 1, b); //根据其输入的位置，将其及以后的数据向后移动一个位置
}
num++;
printf("请输入学号:");
scanf("%s", &students[a - 1].ID);
getchar();
printf("请输入姓名:");
scanf("%s", &students[a - 1].Name);
getchar();
printf("请输入英语成绩:");
scanf("%f", &students[a - 1].Score1);
getchar();
printf("请输入数学成绩:");
scanf("%f", &students[a - 1].Score2);
getchar();
printf("请输入语文成绩:");
scanf("%f", &students[a - 1].Score3);
getchar();
printf("请输入程序设计成绩:");
scanf("%f", &students[a - 1].Score4); //输入新数据
getchar();
students[a - 1].All = students[a - 1].Score1 + students[a - 1].Score2 + students[a - 1].Score3 + students[a - 1].Score4;
students[a - 1].Average = (students[a - 1].Score1 + students[a - 1].Score2 + students[a - 1].Score3 + students[a - 1].Score4) / 4;
}
void search() //查询学生信息
{
while (1)
{
char name[20];
int index;
printf("请输入要查询的学生的姓名:");
scanf("%s", &name);
getchar();
index = Student_SearchByName(name); //调用搜查name函数，根据其返回值确定位置
if (index == -1)
{
printf("学生不存在!\n");
}
else
{
printf("你要查询的学生信息为:\n");
Student_DisplaySingle(index);
}
printf("是否继续?(y/n):>");
if (getchar() == 'n')
{
break;
}
}
}
void SortStudent() //根据平均分排序
{
int i, j;
// struct students tmp;
for (i = 0; i < num; i++)
{
students[i].Average = (students[i].Score1 + students[i].Score2 + students[i].Score3 + students[i].Score4) / 4;
}
for (i = 0; i < num; i++)
{
for (j = 1; j < num - i; j++)
{
if (students[j - 1].Average < students[j].Average)
{
Copy(students, num, j - 1);
Copy(students, j - 1, j);
Copy(students, j, num);
// tmp=students[j-1];
// students[j-1]=students[j];
// students[j]=tmp; //冒泡排序
}
}
}
int a;
printf("%10s%10s%8s%8s%8s%8s%10s%10s\n", "学号", "姓名", "英语", "数学", "语文", "程序设计", "总成绩", "平均成绩");
printf("-------------------------------------------------------------------------\n");
for (a = 0; a < num; a++)
{
printf("%10s%10s%8.2f%8.2f%8.2f%8.2f%10.2f%10.2f\n", students[a].ID, students[a].Name,
students[a].Score1, students[a].Score2, students[a].Score3, students[a].Score4, students[a].All, students[a].Average);
}
}
void SearchLow() //搜索不及格的并输出
{
int a;
printf("英语不及格的有：%10s%10s%8s\n", "姓名", "学号", "英语");
for (a = 0; a < num; a++)
{
if (students[a].Score1 < 60)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score1); //从头搜索到尾，若小于60就输出
}
printf("数学不及格的有：%10s%10s%8s\n", "姓名", "学号", "数学");
for (a = 0; a < num; a++)
{
if (students[a].Score2 < 60)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score2);
}
printf("语文不及格的有：%10s%10s%8s\n", "姓名", "学号", "语文");
for (a = 0; a < num; a++)
{
if (students[a].Score3 < 60)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score3);
}
printf("程序设计不及格的有%10s%10s%8s\n", "姓名", "学号","程序设计");
for (a = 0; a < num; a++)
{
if (students[a].Score4 < 60)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score4);
}
system("pause");
}
void SearchHigh() //搜索成绩最高者输出
{
int a;
int max;
printf("英语成绩最高分为%10s%10s%8s\n", "姓名", "学号", "英语");
max = students[0].Score1;
for (a = 1; a < num; a++)
{
if (students[a].Score1 > max)
max = students[a].Score1;
}
for (a = 0; a < num; a++)
{
if (max == students[a].Score1)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score1);
}
printf("数学成绩最高分为%10s%10s%8s\n", "姓名", "学号", "数学");
max = students[0].Score2;
for (a = 1; a < num; a++)
{
if (students[a].Score2 > max)
max = students[a].Score2;
}
for (a = 0; a < num; a++)
{
if (max == students[a].Score2)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score2);
}
printf("语文成绩最高分为%10s%10s%8s\n", "姓名", "学号", "语文");
max = students[0].Score3;
for (a = 1; a < num; a++)
{
if (students[a].Score3 > max)
max = students[a].Score3;
}
for (a = 0; a < num; a++)
{
if (max == students[a].Score3)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score3);
}
printf("程序设计最高分为%10s%10s%8s\n", "姓名", "学号", "程序设计");
max = students[0].Score4;
for (a = 1; a < num; a++)
{
if (students[a].Score4 > max)
max = students[a].Score4;
}
for (a = 0; a < num; a++)
{
if (max == students[a].Score4)
printf("\t\t%10s%10s%8.2f\n", students[a].Name, students[a].ID, students[a].Score4);
}
system("pause");
}
void SaveStudent()
{
FILE *fp = fopen("student-information.txt", "w+");
fprintf(fp, "%d\n", num);
for (int i = 0; i < num; i++)
{
fprintf(fp, "%s %s %f %f %f %f %f %f\n", students[i].ID, students[i].Name, students[i].Score1, students[i].Score2, students[i].Score3, students[i].Score4, students[i].All, students[i].Average);
}
fclose(fp);
printf("学生信息文件已保存在本地\n");
}
void LoadInformation()
{
FILE *fp = fopen("student-information.txt", "r");
fscanf(fp, "%d", &num);
for (int i = 0; i < num; i++)
{
fscanf(fp, "%s %s %f %f %f %f %f %f\n", students[i].ID, students[i].Name, &students[i].Score1, &students[i].Score2, &students[i].Score3, &students[i].Score4, &students[i].All, &students[i].Average);
}
fclose(fp);
printf("系统已读取文件学生信息\n");
}
/*主程序*/
int main()
{
int i;
while (1)
{
LoadInformation();
printf("-------------------------------------------------------------------------\n");
printf(" 请选择系统功能 \n");
printf("-------------------------------------------------------------------------\n");
printf(" 欢迎使用高校学生信息管理系统 \n");
printf("-------------------------------------------------------------------------\n");
printf(" 0.退出系统 \n");
printf(" 1.学生信息的录入 \n");
printf(" 2.学生信息的修改 \n");
printf(" 3.学生信息的删除 \n");
printf(" 4.学生信息的插入 \n");
printf(" 5.学生信息的打印 \n");
printf(" 6.学生信息的查找 \n");
printf(" 7.学生成绩的排序 \n");
printf(" 8.生成学生信息文件 \n");
printf(" 9.读取学生信息文件 \n");
printf(" 10.输出各科不及格学生信息 \n");
printf(" 11.输出各科最高分学生信息 \n");
printf("-------------------------------------------------------------------------\n");
printf("--------------------------------作者: wink-------------------------------\n");
printf("请选择(0-11):>");
scanf("%d", &i);
switch (i)
{
case 1:
InputStudent();
break;
case 2:
ModifyStudent();
break;
case 3:
DeleteStudent();
break;
case 4:
InsertStudent();
break;
case 5:
display();
break;
case 6:
search();
break;
case 7:
SortStudent();
break;
case 8:
SaveStudent();
break;
case 9:
LoadInformation();
break;
case 10:
SearchLow();
break;
case 11:
SearchHigh();
break;
case 0:
printf("Thanks for using, See you again !");
exit(0);
default:;
}
}
return 0;
}
- 帮你找了个相似的问题, 你可以看下: https://ask.csdn.net/questions/28543
- 这篇博客也不错, 你可以看下C语言/C++ 中除法得到结果的精度问题（有浮点数参与除法，结果就是浮点数，除数和被除数都是整数，结果默认是整数）
- 除此之外, 这篇博客: 大学要学 C++，那么 C 语言还要继续学吗？中的 先来看看，应该掌握的内容是什么： 部分也许能够解决你的问题, 你可以仔细阅读以下内容或者直接跳转源博客中阅读:
- 顺序、条件、循环三大控制语句
- C 中几大基元数据类型的用法
- 熟悉掌握数组的用法
- 熟练掌握指针的用法
- 熟练掌握结构体、枚举、联合等数据类型的用法
- 熟练使用常用 C 库函数，如控制台输入输出流、字符串操作、文件操作、时间函数等等
这个阶段是入门阶段，主要掌握的是基础的语法学习。但是不能停留在掌握了，还要反复练习。推荐大家看看《C语言程序设计 现代方法》这本书是迷茫的同学指南针的存在。如果你说书还是看不懂，那么还有《啊哈！C》这本是给初中生看的书。
不管是C还是C++指针都是非常难搞，核心的知识点。上面承C/C++语言本身，下承操作系统原理。还有一本书《C和指针》，这本书的内容也是通俗易懂。
如果还希望深入掌握C/C++的同学，可以看下面这张学习路线图：
- 您还可以看一下 邵发老师的《C语言/C++学习指南》语法篇（从入门到精通）课程中的 类型转换与优先级小节, 巩固相关知识点
- 以下回答来自chatgpt:
#include <stdio.h> #include <stdlib.h> #include <string.h> //定义学生信息结构体 typedef struct{ char name[20]; int age; char studentID[20]; } Student; int numStudents = 0; // 学生数量 Student *students = NULL; // 学生信息数组 //函数声明 void recordStudentInfo(); void searchStudentInfo(); void sortStudentInfo(); void deleteStudentInfo(); int main() { int choice; while(1) { printf("学生信息管理系统\n"); printf("1. 录入学生信息\n"); printf("2. 查询学生信息\n"); printf("3. 排序学生信息\n"); printf("4. 删除学生信息\n"); printf("5. 退出\n"); printf("请选择要进行的操作："); scanf("%d", &choice); switch(choice){ case 1: recordStudentInfo(); // 录入学生信息 break; case 2: searchStudentInfo(); // 查询学生信息 break; case 3: sortStudentInfo(); // 排序学生信息 break; case 4: deleteStudentInfo(); // 删除学生信息 break; case 5: free(students); // 释放学生信息数组内存 printf("已退出学生信息管理系统\n"); return 0; default: printf("输入无效，请重新选择操作\n"); break; } } } // 录入学生信息 void recordStudentInfo() { Student student; printf("请输入学生的姓名："); scanf("%s", student.name); printf("请输入学生的年龄："); scanf("%d", &student.age); printf("请输入学生的学号："); scanf("%s", student.studentID); // 将学生信息添加到学生信息数组 students = (Student*)realloc(students, sizeof(Student) * (numStudents + 1)); students[numStudents++] = student; printf("学生信息录入成功\n"); } // 查询学生信息 void searchStudentInfo() { int choice; char keyword[20]; printf("请选择查询方式：\n"); printf("1. 根据姓名查询\n"); printf("2. 根据学号查询\n"); printf("选择："); scanf("%d", &choice); switch(choice){ case 1: printf("请输入要查询的学生姓名："); scanf("%s", keyword); for(int i=0; i<numStudents; i++){ if(strcmp(students[i].name, keyword) == 0){ printf("姓名：%s\n", students[i].name); printf("年龄：%d\n", students[i].age); printf("学号：%s\n", students[i].studentID); return; } } printf("未查询到该学生信息\n"); break; case 2: printf("请输入要查询的学生学号："); scanf("%s", keyword); for(int i=0; i<numStudents; i++){ if(strcmp(students[i].studentID, keyword) == 0){ printf("姓名：%s\n", students[i].name); printf("年龄：%d\n", students[i].age); printf("学号：%s\n", students[i].studentID); return; } } printf("未查询到该学生信息\n"); break; default: printf("输入无效，请重新选择查询方式\n"); break; } } // 排序学生信息 void sortStudentInfo() { int choice; printf("请选择排序方式：\n"); printf("1. 按姓名排序\n"); printf("2. 按年龄排序\n"); printf("选择："); scanf("%d", &choice); switch(choice){ case 1: for(int i=0; i<numStudents-1; i++){ for(int j=0; j<numStudents-1-i; j++){ if(strcmp(students[j].name, students[j+1].name) > 0){ Student temp = students[j]; students[j] = students[j+1]; students[j+1] = temp; } } } printf("按姓名排序完成\n"); break; case 2: for(int i=0; i<numStudents-1; i++){ for(int j=0; j<numStudents-1-i; j++){ if(students[j].age > students[j+1].age){ Student temp = students[j]; students[j] = students[j+1]; students[j+1] = temp; } } } printf("按年龄排序完成\n"); break; default: printf("输入无效，请重新选择排序方式\n"); break; } } // 删除学生信息 void deleteStudentInfo() { int choice; char keyword[20]; printf("请选择删除方式：\n"); printf("1. 根据姓名删除\n"); printf("2. 根据学号删除\n"); printf("选择："); scanf("%d", &choice); switch(choice){ case 1: printf("请输入要删除的学生姓名："); scanf("%s", keyword); for(int i=0; i<numStudents; i++){ if(strcmp(students[i].name, keyword) == 0){ for(int j=i; j<numStudents-1; j++){ students[j] = students[j+1]; } students = (Student*)realloc(students, sizeof(Student) * (numStudents - 1)); numStudents--; printf("已删除该学生信息\n"); return; } } printf("未查询到该学生信息\n"); break; case 2: printf("请输入要删除的学生学号："); scanf("%s", keyword); for(int i=0; i<numStudents; i++){ if(strcmp(students[i].studentID, keyword) == 0){ for(int j=i; j<numStudents-1; j++){ students[j] = students[j+1]; } students = (Student*)realloc(students, sizeof(Student) * (numStudents - 1)); numStudents--; printf("已删除该学生信息\n"); return; } } printf("未查询到该学生信息\n"); break; default: printf("输入无效，请重新选择删除方式\n"); break; } }
如果你已经解决了该问题, 非常希望你能够分享一下解决方案, 写成博客, 将相关链接放在评论区, 以帮助更多的人 ^-^