c语言学生管理系统(输入信息，查找学生)
输入n，进入添加学生信息界面
输入m，进入查找学生界面（通过名字查找）
输入x，进入查找学生界面（通过学号查找）
输入b，进入查找学生界面（通过班级查找）
输入q，退出程序
一.添加学生信息界面下:
依次输入学生姓名、学号、班级等信息
输入完成后返回功能选择界面
二.
查找学生界面(通过名字查找)下:输入学生姓名，显示对应的学号、班级等信息，如果查不到，显示对应的提示信息，查找完成后返回功能选择界面
查找学生界面（通过学号查找）下：输入学生学号，显示对应的姓名、班级等信息，如果查不到，显示对应的提示信息，查找完成后返回功能选择界面
查找学生界面(通过班级查找)下:输入学生班级，显示该班级中所有学生的姓名、学号等信息，如果查不到，显示对应的提示信息，查找完成后返回功能选择界面
可以参考我这个稍加改动就行
https://blog.csdn.net/weixin_64811333/article/details/125333242
采纳后私信帮你改好
#include<stdio.h>
#include<windows.h>
#define Max 25
#define obj_num 5
struct Stu
{
char Name[25]; //姓名
int Number; //学号
int Language_score;//语文成绩
int Math_score; //数学成绩
int English_score; //英语成绩
int PE_score; //体育成绩
int C_score; //C语言成绩
int Sum_score; //总成绩
};
void input(struct Stu Class[],int j)
{
printf("输入第%d位同学姓名:",j+1);
scanf("%s",Class[j].Name);
getchar();
printf("输入第%d位同学学号:",j+1);
scanf("%d",&Class[j].Number);
printf("输入第%d位同学语文成绩:",j+1);
scanf("%d",&Class[j].Language_score);
printf("输入第%d位同学数学成绩:",j+1);
scanf("%d",&Class[j].Math_score);
printf("输入第%d位同学英语成绩:",j+1);
scanf("%d",&Class[j].English_score);
printf("输入第%d位同学体育成绩:",j+1);
scanf("%d",&Class[j].PE_score);
printf("输入第%d位同学C语言成绩:",j+1);
scanf("%d",&Class[j].C_score);
Class[j].Sum_score=Class[j].Language_score+Class[j].Math_score+Class[j].English_score+Class[j].PE_score+Class[j].C_score;
}
void output(struct Stu Class[],int n)
{
printf("---------------------------------------------\n");
printf("姓名 学号 语文 数学 英语 体育 C语言 总分");
printf("\n");
int j;
for(j=0; j<n; j++)
{
printf("%5s",Class[j].Name);
printf("%5d",Class[j].Number);
printf("%6d",Class[j].Language_score);
printf("%6d",Class[j].Math_score);
printf("%6d",Class[j].English_score);
printf("%6d",Class[j].PE_score);
printf("%6d",Class[j].C_score);
printf("%7d",Class[j].Sum_score);
printf("\n");
}
printf("---------------------------------------------\n");
}
void outputOne(struct Stu Class[],int j)
{
printf("姓名 学号 语文 数学 英语 体育 C语言 总分");
printf("\n");
printf("%5s",Class[j].Name);
printf("%5d",Class[j].Number);
printf("%6d",Class[j].Language_score);
printf("%6d",Class[j].Math_score);
printf("%6d",Class[j].English_score);
printf("%6d",Class[j].PE_score);
printf("%6d",Class[j].C_score);
printf("%7d",Class[j].Sum_score);
printf("\n");
}
void Sort(struct Stu Class[],int n)
{
int j,k;
struct Stu t;
for(j=0; j<n-1; j++)
{
for(k=0; k<n-j-1; k++)
{
if(Class[k].Sum_score<Class[k+1].Sum_score)
{
t=Class[k];
Class[k]=Class[k+1];
Class[k+1]=t;
}
}
}
}
int search(int number,int n,struct Stu Class[])
{
int i,p=0;
for(i=0; i<n; i++)
{
if(Class[i].Number==number)
{
p=i;
return p;
}
}
return -1;
}
void modify(int number,int n,struct Stu Class[])
{
int index=search(number,n,Class);
if(index==-1)
{
printf("找不到该学号\n");
}
else
{
printf("学号%d的学生是第%d位\n",number,index+1);
input(Class,index);
printf("修改成功\n");
output(Class,n);
}
}
void del(int number,int n,struct Stu Class[])
{
int index=search(number,n,Class);
if(index==-1)
{
printf("找不到该学号\n");
}
else
{
printf("学号%d的学生是第%d位\n",number,index);
int i;
for(i=index; i<n-1; i++)
{
Class[i]= Class[i+1];
}
printf("删除成功\n");
output(Class,n-1);
}
}
double calave(int n,struct Stu Class[],double ave[])
{
int Language_score_sum=0;
int Math_score_sum=0;
int English_score_sum=0;
int PE_score_sum=0;
int C_score_sum=0;
for(int i=0; i<n; i++)
{
Language_score_sum+=Class[i].Language_score;
Math_score_sum+=Class[i].Math_score;
English_score_sum+=Class[i].English_score;
PE_score_sum+=Class[i].PE_score;
C_score_sum+=Class[i].C_score;
}
ave[0]=(double)Language_score_sum/n;
ave[1]=(double)Math_score_sum/n;
ave[2]=(double)English_score_sum/n;
ave[3]=(double)PE_score_sum/n;
ave[4]=(double)C_score_sum/n;
}
void save(int n,struct Stu Class[])
{
FILE *fp;
fp = fopen("score_data.txt","w");
if(fp == NULL)
{
printf("error!");
return;
}
else
{
for(int j=0; j<n; j++)
{
fprintf(fp,"%s %d %d %d %d %d %d %d\n",Class[j].Name,Class[j].Number,Class[j].Language_score,Class[j].Math_score,Class[j].English_score,Class[j].PE_score,Class[j].C_score,Class[j].Sum_score);
}
printf("文件写入成功\n");
}
fclose(fp);
}
int read(int n,struct Stu Class[])
{
FILE *fp;
fp = fopen("score_data.txt","r");
int count=0;
if(fp == NULL)
{
printf("error!");
return 0;
}
else
{
for(int j=0; j<n; j++)
{
int flag=fscanf(fp,"%s %d %d %d %d %d %d %d\n",Class[j].Name,&Class[j].Number,&Class[j].Language_score,&Class[j].Math_score,&Class[j].English_score,&Class[j].PE_score,&Class[j].C_score,&Class[j].Sum_score);
if(flag!=-1) count++;
}
printf("文件读取成功\n");
}
fclose(fp);
return count;
}
void menu(struct Stu Class[])
{
int n=0,count;
int option=1;
while(option<=9&&option>=1)
{
printf("------------------------\n");
printf("------学生成绩管理------\n");
printf("------1.输入成绩 ------\n");
printf("------2.输出成绩 ------\n");
printf("------3.按总成绩排序----\n");
printf("------4.按学号查询成绩--\n");
printf("------5.修改信息 ------\n");
printf("------6.删除学生 ------\n");
printf("------7.计算各科平均分--\n");
printf("------8.文件读入 ------\n");
printf("------9.保存至文件------\n");
printf("------other.退出 ------\n");
printf("------------------------\n");
printf("输入选项：");
scanf("%d",&option);
switch(option)
{
case 1:
{
system("cls");
printf("输入学生的个数(不大于%d):",Max-n);
scanf("%d",&count);
while(count--)
{
input(Class,n++);
}
output(Class,n);
break;
}
case 2:
{
system("cls");
output(Class,n);
break;
}
case 3:
{
system("cls");
Sort(Class,n);
output(Class,n);
break;
}
case 4:
{
system("cls");
int number;
printf("输入要查找的学号：");
scanf("%d",&number);
int index=search(number,n,Class);
if(index==-1)
{
printf("查找失败\n");
}
else
{
printf("查找成功\n");
outputOne(Class,index);
}
break;
}
case 5:
{
system("cls");
output(Class,n);
int number;
printf("输入要修改成绩的学生对应的学号：");
scanf("%d",&number);
modify(number,n,Class);
output(Class,n);
break;
}
case 6:
{
system("cls");
output(Class,n);
int number;
printf("输入要删除的学号：");
scanf("%d",&number);
del(number,n,Class);
n--;
system("cls");
output(Class,n);
break;
}
case 7:
{
system("cls");
output(Class,n);
double ave[obj_num];
calave(n,Class,ave);
char str[]="平均分";
printf("\n");
printf("%5s",str);
printf(" ");
printf("%5.2lf",ave[0]);
printf("%6.2lf",ave[1]);
printf("%6.2lf",ave[2]);
printf("%6.2lf",ave[3]);
printf("%6.2lf",ave[4]);
printf("\n");
break;
}
case 8:
{
system("cls");
n-=n;
n+=read(Max,Class);
break;
}
case 9:
{
system("cls");
save(n,Class);
break;
}
default :
{
break;
}
}
}
}
int main()
{
struct Stu Class [Max];
menu(Class);
return 0;
}
图示效果：
代码示例：
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
//宏定义变量
#define N 1024
#define MAXSIZE 32
#define WIDESIZE 65
typedef struct Student {
/*学生基本信息*/
int code;
//学号
char name[MAXSIZE];
//姓名，采用字符数组
int age;
//年龄
char sex[MAXSIZE];
//性别
/*学生成绩信息*/
int math;
//数学成绩
int chinese;
//语文成绩
int english;
//英语成绩
struct Student *next;
//指向下一个学生的指针
}
Student;
/*
*创建学生链表
*/
Student * createList() {
//申请一个Student【学生结构体】大小的控件
Student * studentList = (Student*)malloc(sizeof(Student));
return studentList;
}
/*
*创建学生节点
*/
Student * createNode() {
Student * newStu = (Student*)malloc(sizeof(Student));
printf("学号:");
scanf("%d",&newStu->code);
printf("姓名:");
scanf("%s",newStu->name);
printf("年龄:");
scanf("%d",&newStu->age);
printf("性别:");
scanf("%s",newStu->sex);
printf("数学:");
scanf("%d",&newStu->math);
printf("语文:");
scanf("%d",&newStu->chinese);
printf("英语:");
scanf("%d",&newStu->english);
newStu->next=NULL;
return newStu;
}
//显示学生信息
void showMsg(Student *stu) {
printf("%d\t%s\t%d\t%s\t%d\t%d\t%d\t\n",stu->code,stu->name,stu->age,stu->sex,
stu->math,stu->chinese,stu->english);
}
/*
*添加学生信息
*/
Student * insertStudent(Student * head) {
int i,count;
printf("请输入录入的学生人数\n");
scanf("%d",&count);
//获得学生链表的头节点
Student *tail= head;
//初始批量录入学生信息
if(head) {
for (i = 0;i<count;i++) {
printf("==============输入第%d个学生信息==============》\n",i+1);
Student * newNode = createNode();
tail->next = newNode;
//tail永远指向最后一位学生，即尾节点
tail = tail->next;
}
} else {
//批量添加学生信息
while(tail) {
tail = tail->next;
}
for (i = 0;i<count;i++) {
printf("==============输入第%d个学生信息==============》\n",i+1);
Student * newNode = createNode();
//创建存储学生信息的节点
tail->next = newNode;
//添加学生
tail = tail->next;
//尾节点后移
}
}
return head;
//返回头节点
}
/*
*删除学生信息
*/
void deleteStudent(Student *studentList) {
printf("请输入学号:");
int ditCode;
scanf("%d",&ditCode);
//获取链表头节点
Student *preStudent = studentList;
//获取链表第一个节点
Student *afterStudent = studentList->next;
if(afterStudent) {
while(afterStudent) {
if(afterStudent->code==ditCode)//学号相等，则说明已找到要删除的学生 {
preStudent->next=afterStudent->next;
//进行删除操作
free(afterStudent);
//释放节点控件
break;
}
//学生编号不相等，则继续向后移动，进行遍历
preStudent = afterStudent;
afterStudent = afterStudent->next;
} else {
printf("没有这名学生的信息!");
}
}
/*
*根据学号修改学生信息
*/
//1.修改姓名
void changeName(Student *stu) {
char newName[MAXSIZE];
printf("请输入新的名字:");
scanf("%s",newName);
strcpy(stu->name,newName);
showMsg(stu);
}
//2.修改年龄
void changeAge(Student *stu) {
int newAge;
printf("请输入新的年龄:");
scanf("%d",&newAge);
stu->age=newAge;
showMsg(stu);
}
//3.修改数学成绩
void changeMathScore(Student *stu) {
int newSocre;
printf("请输入新的数学成绩:");
scanf("%d",&newSocre);
stu->math=newSocre;
showMsg(stu);
}
//4.修改语文成绩
void changeChineseScore(Student *stu) {
int newSocre;
printf("请输入新的语文成绩:");
scanf("%d",&newSocre);
stu->chinese=newSocre;
showMsg(stu);
}
//5.修改英语成绩
void changeEnglishScore(Student *stu) {
int newSocre;
printf("请输入新的英语成绩:");
scanf("%d",&newSocre);
stu->chinese=newSocre;
showMsg(stu);
}
/*
*
*1、采用多分支选择结构，实现学生信息的修改
*2、编辑学生信息输入对应的编号，进行对应的修改，例：1，则进行姓名修改
*/
void editStudent(Student *studentList) {
printf("请输入学号:");
int ditCode;
scanf("%d",&ditCode);
Student *ditStu = studentList->next;
if(ditStu!=NULL) {
while(ditStu!=NULL) {
if(ditStu->code==ditCode) {
printf("请输入修改信息编号:\n1.姓名\n2.年龄\n3.数学\n4.语文\n5.英语\n");
int number;
scanf("%d",&number);
switch(number) {
case 1: changeName(ditStu);
break;
case 2: changeAge(ditStu);
break;
case 3: changeMathScore(ditStu);
break;
case 4: changeChineseScore(ditStu);
break;
case 5: changeEnglishScore(ditStu);
break;
default:
printf("输入内容无效!");
}
}
ditStu = ditStu->next;
}
} else {
printf("抱歉，你还未录入学生信息，请先录入学生信息!\n");
}
}
//根据学生编号查找学生信息
void findStudent(Student *studentList) {
printf("请输入学号:");
int code;
scanf("%d",&code);
//指向第一个学生节点
Student *ditStu = studentList->next;
//如果学生链表不为空，则进行查询
if(ditStu!=NULL) {
while(ditStu!=NULL) {
if(ditStu->code!=code) //学生学号不相等，则继续下一个比对查找 {
ditStu=ditStu->next;
//找到后则进行学生信息的输出
showMsg(ditStu);
printf("这里:");
break;
}
} else {
printf("没有这名学生的信息!");
}
}
/*
*显示学生列表
*/
void showStudent(Student * studentList) {
Student *temp = studentList->next;
printf("学号\t姓名\t年龄\t性别\t数学\t语文\t英语\n");
//如果学生链表不为空，则进行输出
while(temp != NULL) {
showMsg(temp);
temp=temp->next;
}
printf("\n");
}
/*
*保存学生信息到文件中
*/
void saveStudent(Student *studentList) {
//创建文件指针
FILE *fp = NULL;
//存放在D【C盘需要事先创建文件夹】盘根目录下，自动【有就不创建。否则创建文件】
//创建studentMsg.txt
fp = fopen("D:\\studentMsg.txt","a+");
//fp = fopen("C:\\Users\\SherryHan\\Desktop\\学习文件\\political\\studentMsg.txt","a+");
//“a+”采用追加的形式保存到文件中
Student *stu = studentList->next;
//指针指向第一个学生
char title[N] = "学号\t姓名\t年龄\t性别\t数学\t语文\t英语\n";
//将标题【学生属性列】写入文件中
fprintf(fp,"%s",title);
//遍历学生链表，并将学生信息写入文件，直到最后一个学生的下一个节点为空
while(stu!=NULL) {
fprintf(fp,"%d\t%s\t%d\t%s\t%d\t%d\t%d\n",stu->code,stu->name,stu->age,stu->sex
,stu->math,stu->chinese,stu->english);
stu=stu->next;
}
fclose(fp);
}
void showHelp() {
printf("1、此系统可以对学生信息进行管理。\n");
printf("2、输入对应功能项的编号即可进行不同功能的系统操作。\n");
}
/*
*显示菜单
*/
void showMenu() {
int i;
printf("------------------------");
printf("\t欢迎使用学生管理系统\t");
printf("------------------------\n");
printf("\t");
for (i=0;i<WIDESIZE;i++) {
printf("*");
}
printf("\n");
printf("\t*\t0.系统帮助及说明\t**");
printf("\t1.刷新学生信息\t\t*\n");
printf("\t*\t2.查询学生信息\t\t");
printf("**\t3.修改学生信息\t\t*\n");
printf("\t*\t4.增加学生信息\t\t**");
printf("\t5.按学号删除信息\t*\n");
printf("\t*\t6.显示所有学生信息\t**");
printf("\t7.保存当前信息\t\t*\n");
printf("\t*\t8.退出学生管理系统\t**");
for (i=0;i<4;i++) {
printf("\t");
}
printf("*\n");
printf("\t");
for (i=0;i<WIDESIZE;i++) {
printf("*");
}
printf("\n");
printf("------------------------");
printf("\t2022计算机科学与技术\t");
printf("------------------------\n");
printf("请按所需输入菜单编号:");
}
/*
*
*采用带头结点的链表来存储学生信息
*
*/
int main(int argc, char const *argv[]) {
int choice;
Student * studentList = createList();
do {
showMenu();
scanf("%d",&choice);
switch(choice) {
case 0: showHelp();
break;
case 1: printf("刷新完成!\n");
break;
case 2: findStudent(studentList);
break;
case 3: editStudent(studentList);
break;
case 4: insertStudent(studentList);
break;
case 5: deleteStudent(studentList);
break;
case 6: showStudent(studentList);
break;
case 7: saveStudent(studentList);
break;
default:
exit(1);
}
}
while(1);
return 0;
}
https://blog.csdn.net/weixin_52062043/article/details/115278862
https://blog.csdn.net/weixin_52062043/article/details/115278862