关于#c语言#的问题：学生管理系统
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 50
#define MAX_NAME_LEN 20
#define MAX_ADDR_LEN 50
#define MAX_PHONE_NUM 15
#define MAX_EMAIL_LEN 50
typedef struct {
char id[10];
char name[20];
char age[20];
char gender[20];
char birth_year[20];
char address[20];
char phone[20];
char email[20];
} Student;
Student students[MAX_STUDENTS]; // 学生信息保存在该数组中
int num_students = 0; // 当前学生数量
// 录入学生信息
void add_student() {
if (num_students >= MAX_STUDENTS) {
printf("学生信息已满，不能添加新学生！\n");
return;
}
printf("请输入学号、姓名、年龄、性别、出生年份、地址、电话和邮箱：\n");
scanf("%s %s %s %s %s %s %s %s", students[num_students].id, students[num_students].name, students[num_students].age,
students[num_students].gender, students[num_students].birth_year, students[num_students].address,
students[num_students].phone, students[num_students].email);
num_students++;
printf("学生信息录入成功！\n");
}
// 显示所有学生信息
void show_students() {
if (num_students == 0) {
printf("学生信息为空！\n");
return;
}
printf("学号\t姓名\t年龄\t性别\t出生年份\t\t地址\t\t电话\t\t\t邮箱\t\t\n");
for (int i = 0; i < num_students; i++) {
printf("%s\t%s\t%d\t%c\t%d\t\t%s\t%s\t%s\n", students[i].id, students[i].name, students[i].age,
students[i].gender, students[i].birth_year, students[i].address, students[i].phone, students[i].email);
}
}
// 按姓名查询学生信息
void search_student_by_name() {
char name[MAX_NAME_LEN];
printf("请输入要查询的学生姓名：\n");
scanf("%s", name);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].name, name) == 0) {
printf("学号：%s\t姓名：%s\t年龄：%d\t性别：%c\t出生年份：%d\t地址：%s\t电话：%s\t邮箱：%s\n",
students[i].id, students[i].name, students[i].age, students[i].gender, students[i].birth_year,
students[i].address, students[i].phone, students[i].email);
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 按学号查询学生信息
void search_student_by_id() {
char id[10];
printf("请输入要查询的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0) {
printf("学号：%s\t姓名：%s\t年龄：%d\t性别：%c\t出生年份：%d\t地址：%s\t电话：%s\t邮箱：%s\n",
students[i].id, students[i].name, students[i].age, students[i].gender, students[i].birth_year,
students[i].address, students[i].phone, students[i].email);
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 修改学生信息
void modify_student() {
char id[10];
printf("请输入要修改的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0) {
printf("请输入学生信息（格式：姓名 年龄 性别 出生年份 地址 电话 邮箱）：\n");
scanf("%s%d %c%d%s%s%s", students[i].name, &students[i].age, &students[i].gender,
&students[i].birth_year, students[i].address, students[i].phone, students[i].email);
printf("学生信息已修改！\n");
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 删除学生信息
void delete_student() {
char id[10];
printf("请输入要删除的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0) {
for (int j = i; j < num_students - 1; j++) {
students[j] = students[j + 1];
}
num_students--;
printf("学生信息已删除！\n");
found = 1;
break;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 按姓名排序
void sort_students_by_name() {
for (int i = 0; i < num_students - 1; i++) {
for (int j = 0; j < num_students - i - 1; 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("学生信息已按姓名排序！\n");
}
// 按学号排序
void sort_students_by_id() {
for (int i = 0; i < num_students - 1; i++) {
for (int j = 0; j < num_students - i - 1; j++) {
if (strcmp(students[j].id, students[j + 1].id) > 0) {
Student temp = students[j];
students[j] = students[j + 1];
students[j + 1] = temp;
}
}
}
printf("学生信息已按学号排序！\n");
}
int main() {
int choice;
while (1) {
printf("\n------学生信息管理系统------\n");
printf("1. 学生信息录入\n");
printf("2. 学生信息浏览\n");
printf("3. 查询、排序\n");
printf("4. 学生信息的删除与修改\n");
printf("0. 退出系统\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
add_student();
break;
case 2:
show_students();
break;
case 3:
printf("1. 按姓名查询\n");
printf("2. 按学号查询\n");
printf("3. 按姓名排序\n");
printf("4. 按学号排序\n");
printf("0. 返回\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
search_student_by_name();
break;
case 2:
search_student_by_id();
break;
case 3:
sort_students_by_name();
break;
case 4:
sort_students_by_id();
break;
case 0:
break;
default:
printf("无效的选择！\n");
break;
}
break;
case 4:
printf("1. 修改学生信息\n");
printf("2. 删除学生信息\n");
printf("0. 返回\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
modify_student();
break;
case 2:
delete_student();
break;
case 0:
break;
default:
printf("无效的选择！\n");
break;
}
break;
case 0:
printf("谢谢使用，再见！\n");
exit(0);
default:
printf("无效的选择！\n");
break;
}
}
return 0;
}
第50行，年龄你定义的也是字符串，不是整型啊，输出要用%s，不能用%d
后面的性别，出生年份也一样。字符串都得用%s，不要乱用。modify函数里也一样，乱七八糟
```c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 50
#define MAX_NAME_LEN 20
#define MAX_ADDR_LEN 50
#define MAX_PHONE_NUM 15
#define MAX_EMAIL_LEN 50
typedef struct {
char id[10];
char name[MAX_NAME_LEN];
char age[20];
char gender[20];
char birth_year[20];
char address[MAX_ADDR_LEN];
char phone[MAX_PHONE_NUM];
char email[MAX_EMAIL_LEN];
} Student;
Student students[MAX_STUDENTS]; // 学生信息保存在该数组中
int num_students = 0; // 当前学生数量
// 录入学生信息
void add_student() {
if (num_students >= MAX_STUDENTS) {
printf("学生信息已满，不能添加新学生！\n");
return;
}
printf("请输入学号、姓名、年龄、性别、出生年份、地址、电话和邮箱：\n");
scanf("%s %s %s %s %s %s %s %s", students[num_students].id, students[num_students].name, students[num_students].age,
students[num_students].gender, students[num_students].birth_year, students[num_students].address,
students[num_students].phone, students[num_students].email);
num_students++;
printf("学生信息录入成功！\n");
}
// 显示所有学生信息
void show_students() {
if (num_students == 0) {
printf("学生信息为空！\n");
return;
}
printf("学号\t姓名\t年龄\t性别\t出生年份\t\t地址\t\t电话\t\t\t邮箱\t\t\n");
for (int i = 0; i < num_students; i++) {
printf("%s\t%s\t%s\t%s\t%s\t\t%s\t%s\t%s\n", students[i].id, students[i].name, students[i].age,
students[i].gender, students[i].birth_year, students[i].address, students[i].phone, students[i].email);
}
}
// 按姓名查询学生信息
void search_student_by_name() {
char name[MAX_NAME_LEN];
printf("请输入要查询的学生姓名：\n");
scanf("%s", name);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].name, name) == 0) {
printf("学号：%s\t姓名：%s\t年龄：%s\t性别：%s\t出生年份：%s\t地址：%s\t电话：%s\t邮箱：%s\n",
students[i].id, students[i].name, students[i].age, students[i].gender, students[i].birth_year,
students[i].address, students[i].phone, students[i].email);
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 按学号查询学生信息
void search_student_by_id() {
char id[10];
printf("请输入要查询的学生学号：\n");
scanf("%9s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0) {
printf("学号：%s\t姓名：%s\t年龄：%s\t性别：%s\t出生年份：%s\t地址：%s\t电话：%s\t邮箱：%s\n",
students[i].id, students[i].name, students[i].age, students[i].gender, students[i].birth_year,
students[i].address, students[i].phone, students[i].email);
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 修改学生信息
void modify_student() {
char id[10];
printf("请输入要修改的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0) {
printf("请输入学生信息（格式：姓名 年龄 性别 出生年份 地址 电话 邮箱）：\n");
scanf("%s%s %s%%s%s%s", students[i].name, &students[i].age, &students[i].gender,
&students[i].birth_year, students[i].address, students[i].phone, students[i].email);
printf("学生信息已修改！\n");
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 删除学生信息
void delete_student() {
char id[10];
printf("请输入要删除的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0) {
for (int j = i; j < num_students - 1; j++) {
students[j] = students[j + 1];
}
num_students--;
printf("学生信息已删除！\n");
found = 1;
break;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 按姓名排序
void sort_students_by_name() {
for (int i = 0; i < num_students - 1; i++) {
for (int j = 0; j < num_students - i - 1; 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("学生信息已按姓名排序！\n");
}
// 按学号排序
void sort_students_by_id() {
for (int i = 0; i < num_students - 1; i++) {
for (int j = 0; j < num_students - i - 1; j++) {
if (strcmp(students[j].id, students[j + 1].id) > 0) {
Student temp = students[j];
students[j] = students[j + 1];
students[j + 1] = temp;
}
}
}
printf("学生信息已按学号排序！\n");
}
int main() {
int choice;
while (1) {
printf("\n------学生信息管理系统------\n");
printf("1. 学生信息录入\n");
printf("2. 学生信息浏览\n");
printf("3. 查询、排序\n");
printf("4. 学生信息的删除与修改\n");
printf("0. 退出系统\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
add_student();
break;
case 2:
show_students();
break;
case 3:
printf("1. 按姓名查询\n");
printf("2. 按学号查询\n");
printf("3. 按姓名排序\n");
printf("4. 按学号排序\n");
printf("0. 返回\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
search_student_by_name();
break;
case 2:
search_student_by_id();
break;
case 3:
sort_students_by_name();
break;
case 4:
sort_students_by_id();
break;
case 0:
break;
default:
printf("无效的选择！\n");
break;
}
break;
case 4:
printf("1. 修改学生信息\n");
printf("2. 删除学生信息\n");
printf("0. 返回\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
modify_student();
break;
case 2:
delete_student();
break;
case 0:
break;
default:
printf("无效的选择！\n");
break;
}
break;
case 0:
printf("谢谢使用，再见！\n");
exit(0);
default:
printf("无效的选择！\n");
break;
}
}
return 0;
}
改了之后还是出现那样的问题，无法按学号查询该怎么办
```
- 你看下这篇博客吧, 应该有用👉 ：【无标题】工作室课题：学习总结1
- 除此之外, 这篇博客: 【C语言-学生管理系统】中的 学生管理系统 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
- 您还可以看一下 韩利辉老师的学校网管员培训视频教程课程中的 生成树协议小节, 巩固相关知识点
程序做了如下修改，试下看能否解决你的问题：
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_STUDENTS 50
#define MAX_NAME_LEN 20
#define MAX_ADDR_LEN 50
#define MAX_PHONE_NUM 15
#define MAX_EMAIL_LEN 50
typedef struct {
char id[10];
char name[20];
int age;
char gender[20];
char birth_year[20];
char address[20];
char phone[20];
char email[20];
} Student;
Student students[MAX_STUDENTS]; // 学生信息保存在该数组中
int num_students = 0; // 当前学生数量
// 录入学生信息
void add_student()
{
if (num_students >= MAX_STUDENTS) {
printf("学生信息已满，不能添加新学生！\n");
return;
}
printf("请输入学号、姓名、年龄、性别、出生年份、地址、电话和邮箱：\n");
scanf("%s %s %d %s %s %s %s %s", students[num_students].id, students[num_students].name, students[num_students].age,
students[num_students].gender, students[num_students].birth_year, students[num_students].address,
students[num_students].phone, students[num_students].email);
num_students++;
printf("学生信息录入成功！\n");
}
// 显示所有学生信息
void show_students()
{
if (num_students == 0)
{
printf("学生信息为空！\n");
return;
}
printf("学号\t姓名\t年龄\t性别\t出生年份\t\t地址\t\t电话\t\t\t邮箱\t\t\n");
for (int i = 0; i < num_students; i++)
{
printf("%s\t%s\t%d\t%s\t%s\t\t%s\t%s\t%s\n", students[i].id, students[i].name, students[i].age,
students[i].gender, students[i].birth_year, students[i].address, students[i].phone, students[i].email);
}
}
// 按姓名查询学生信息
void search_student_by_name()
{
char name[MAX_NAME_LEN];
printf("请输入要查询的学生姓名：\n");
scanf("%s", name);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].name, name) == 0) {
printf("学号：%s\t姓名：%s\t年龄：%d\t性别：%s\t出生年份：%s\t地址：%s\t电话：%s\t邮箱：%s\n",
students[i].id, students[i].name, students[i].age, students[i].gender, students[i].birth_year,
students[i].address, students[i].phone, students[i].email);
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 按学号查询学生信息
void search_student_by_id()
{
char id[10];
printf("请输入要查询的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++) {
if (strcmp(students[i].id, id) == 0)
{
printf("学号：%s\t姓名：%s\t年龄：%d\t性别：%s\t出生年份：%s\t地址：%s\t电话：%s\t邮箱：%s\n",
students[i].id, students[i].name, students[i].age, students[i].gender, students[i].birth_year,
students[i].address, students[i].phone, students[i].email);
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 修改学生信息
void modify_student() {
char id[10];
printf("请输入要修改的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].id, id) == 0) {
printf("请输入学生信息（格式：姓名 年龄 性别 出生年份 地址 电话 邮箱）：\n");
scanf("%s%d%s%s%s%s%s", students[i].name, &students[i].age, students[i].gender,
students[i].birth_year, students[i].address, students[i].phone, students[i].email);
printf("学生信息已修改！\n");
found = 1;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 删除学生信息
void delete_student()
{
char id[10];
printf("请输入要删除的学生学号：\n");
scanf("%s", id);
int found = 0;
for (int i = 0; i < num_students; i++)
{
if (strcmp(students[i].id, id) == 0)
{
for (int j = i; j < num_students - 1; j++)
{
memcpy(&students[j], &students[j+1],sizeof(Student));
//students[j] = students[j + 1];
}
num_students--;
printf("学生信息已删除！\n");
found = 1;
break;
}
}
if (!found) {
printf("未找到该学生信息！\n");
}
}
// 按姓名排序
void sort_students_by_name()
{
Student temp;
for (int i = 0; i < num_students - 1; i++)
{
for (int j = 0; j < num_students - i - 1; j++)
{
if (strcmp(students[j].name, students[j + 1].name) > 0)
{
//Student temp = students[j];
memcpy(&temp,&students[j],sizeof(Student));
memcpy(&students[j],&students[j+1],sizeof(Student));
memcpy(&students[j+1],&temp,sizeof(Student));
//students[j] = students[j + 1];
//students[j + 1] = temp;
}
}
}
printf("学生信息已按姓名排序！\n");
}
// 按学号排序
void sort_students_by_id()
{
Student temp;
for (int i = 0; i < num_students - 1; i++)
{
for (int j = 0; j < num_students - i - 1; j++)
{
if (strcmp(students[j].id, students[j + 1].id) > 0)
{
memcpy(&temp,&students[j],sizeof(Student));
memcpy(&students[j],&students[j+1],sizeof(Student));
memcpy(&students[j+1],&temp,sizeof(Student));
//Student temp = students[j];
//students[j] = students[j + 1];
//students[j + 1] = temp;
}
}
}
printf("学生信息已按学号排序！\n");
}
int main()
{
int choice;
while (1)
{
printf("\n------学生信息管理系统------\n");
printf("1. 学生信息录入\n");
printf("2. 学生信息浏览\n");
printf("3. 查询、排序\n");
printf("4. 学生信息的删除与修改\n");
printf("0. 退出系统\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
add_student();
break;
case 2:
show_students();
break;
case 3:
printf("1. 按姓名查询\n");
printf("2. 按学号查询\n");
printf("3. 按姓名排序\n");
printf("4. 按学号排序\n");
printf("0. 返回\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
search_student_by_name();
break;
case 2:
search_student_by_id();
break;
case 3:
sort_students_by_name();
break;
case 4:
sort_students_by_id();
break;
case 0:
break;
default:
printf("无效的选择！\n");
break;
}
break;
case 4:
printf("1. 修改学生信息\n");
printf("2. 删除学生信息\n");
printf("0. 返回\n");
printf("请输入您的选择：");
scanf("%d", &choice);
switch (choice) {
case 1:
modify_student();
break;
case 2:
delete_student();
break;
case 0:
break;
default:
printf("无效的选择！\n");
break;
}
break;
case 0:
printf("谢谢使用，再见！\n");
exit(0);
default:
printf("无效的选择！\n");
break;
}
}
return 0;
}