学生管理系统
##代码过于简单，
##作者新手，勿喷；
#include
#include
#include
#include
typedef long long datestr;
using namespace std;
typedef struct student {//结构体创建
char name[40];
datestr id;
char sex;
char major[40];
/*struct grade gradex;*/
student* next;
}student, * stup;
struct grade {//成绩结构体创建
int c_language;
int date_structure;
int computer_concept;
};
void UI();
void changeUI();
void print(student* fp);
void scan(student* fp);
void help();
void show(student* p);
student* add(student* list);
student* find(student* findp, datestr idx);
student* deletelist(student* headx, datestr delid);
void amend(student* changep);
enum
{
COMMAND_SHOW = 1,
COMMAND_ADD,
COMMAND_DELETE,
COMMAND_CHANGE,
COMMAND_SEARCH,
OMMAND_HELP,
COMMAND_QUIT
};
void UI()//下一步提示
{
cout << "请选择下一步操作" << endl;
}
void changeUI()
{
printf("<><><><><><><><><><><><><><>\n");
printf("$$$$输入【1】修改学生学号$$$$\n");
printf("%%%%%%%%输入【2】修改学生姓名%%%%%%%%\n");
printf("@@@@输入【3】修改学生性别@@@@\n");
printf("&&&&输入【4】修改学生专业&&&&\n");
printf("####输入【5】修改完成----####\n");
printf("<><><><><><><><><><><><><><>\n");
}
void print(student* fp)//打印学生信息函数
{
/*cout << "name is " << p.name << " id is " << p.id << " sex is " << p.sex << " major is " << p.major << endl;/*| c-language:%4d
| date-structure:%4d | computer-concept:%4d*/
printf("name: %8s | id: %15lld | sex:%3c | major:%10s \n",
fp->name, fp->id, fp->sex, fp->major/*,fp->gradex.c_language,fp->gradex.date_structure,fp->gradex.computer_concept*/);
}
void scan(student* fp)//输入数据函数；
{
printf("请输入学生的名字\n");
scanf(" %s", &(fp->name));
printf("请输入学生的学号\n");
scanf("%lld", &(fp->id));
printf("请输入学生的性别\n");
scanf(" %c", &(fp->sex));
printf("请输入学生的专业\n");
scanf(" %s", &(fp->major));
}
void help()//菜单m
{
printf("---------------------------------\n");
printf("|---输入【1】显示所有学生信息---|\n");
printf("|---输入【2】添加一个学生信息---|\n");
printf("|---输入【3】删除一个学生信息---|\n");
printf("|---输入【4】修改一个学生信息---|\n");
printf("|---输入【5】查找一个学生信息---|\n");
printf("|---输入【6】显示帮助*******----|\n");
printf("|---输入【7】退出***********----|\n");
cout << "_________________________________\n" << endl;
}
void show(student* p)//显示学生信息
{
while (p != NULL)
{
print(p);
p = p->next;
}
}
student* find(student* findp, datestr idx)//查找学生信息
{
while (findp != NULL)
{
if (findp->id == idx)
{
return findp;
break;
}
findp = findp->next;
}
if (findp == NULL)
{
return NULL;
}
}
student* deletelist(student* headx, datestr delid)
{
student* fdelp = headx;
student* delp = fdelp->next;
while (delp != NULL)
{
if (delp->id == delid)
{
return fdelp;
}
fdelp = fdelp->next;
delp = delp->next;
}
//cout << "没有查找到此学生，请重新输入" << endl;
return NULL;
}
void amend(student* changep)
{
changeUI();
int x, breakx = 0;
while (breakx == 0)
{
scanf("%d", &x);
switch (x)
{
case 1:
{
printf("请输入修改后的学号\n");
scanf("%lld", &changep->id);
printf("修改成功\n");
break;
}
case 2:
{
cout << "请输入修改后的名字" << endl;
scanf(" %s", &changep->name);
printf("修改成功\n");
break;
}
case 3:
{
cout << "请输入修改后的性别" << endl;
scanf(" %c", &changep->sex);
printf("修改成功\n");
break;
}
case 4:
{
cout << "请输入修改后的专业" << endl;
scanf(" %s", &changep->major);
printf("修改成功\n");
break;
}
case 5:
{
printf("已结束全部修改\n");
print(changep);
breakx = 1;
break;
}
default: {
printf("输入错误!!!\n请重新输入\n");
break;
}
}
}
}
student* add(student* endlist)
{
student* nowlist;
nowlist = (student*)malloc(sizeof(student));
endlist->next = nowlist;
scan(nowlist);
nowlist->next = NULL;
return nowlist;
}
int main()
{
int a = 10;
int scanfx = 0;//输入选择
help();//显示菜单
student head, stu1, stu2, stu3, stu4, stu5, stu6, stu7, stu8, stu9, stu10;
{
head = { NULL,NULL,NULL,NULL };
head.next = &stu1;
stu1 = { "Aeneas",23016020532,'f',"c语言" };
stu1.next = &stu2;
stu2 = { "Alan",23016020533,'f',"电音" };
stu2.next = &stu3;
stu3 = { "彭于晏",23016020534,'f',"励志领域知名人物" };
stu3.next = &stu4;
stu4 = { "里斯",23016020535,'f',"未知" };
stu4.next = &stu5;
stu5 = { "马斯克",23016020536,'f',"企业家" };
stu5.next = &stu6;
stu6 = { "普京",23016020537,'f',"俄罗斯" };
stu6.next = &stu7;
stu7 = { "特朗普",23016020538,'f',"上任总统" };
stu7.next = &stu8;
stu8 = { "川普",23016020539,'f',"未知" };
stu8.next = &stu9;
stu9 = { "张译",23016020540,'f',"演员" };
stu9.next = &stu10;
stu10 = { "谭松韵",23016020541,'m',"演员" };
stu10.next = NULL;
}
//链表初始化内容
student* endlist;
endlist = &stu10;
endlist->next = NULL;
while (scanfx != 7)
{
scanf("%d", &scanfx);
switch (scanfx)
{
case COMMAND_SHOW://1显示学生信息
{
show(head.next);
UI();
break;
system("pause");
}//(1)完成
case COMMAND_ADD://2添加学生信息
{
printf("请输入需要添加学生的信息\n");
endlist = add(endlist);
cout << "添加成功" << endl;
UI();
break;
}//(2)完成
case COMMAND_DELETE://3删除学生信息
{
cout << "请输入需要删除学生的信息" << endl;
datestr delid;
student* ffp;
cin >> delid;
ffp = deletelist(&head, delid);
if (ffp != NULL)
{
ffp->next = ffp->next->next;
//free(ffp->next);
cout << "删除成功" << endl;
}
else cout << "没有查找到此学生，请重新输入" << endl;
UI();
break;
}
case COMMAND_CHANGE://4修改学生信息
{
int a = 0;
while (a == 0)
{
printf("请输入需要修改学生的学号\n");
datestr idx;
scanf("%lld", &idx);
student* changep;
changep = find(&stu1, idx);
printf("请输入需要修改学生的信息\n");
if (changep != NULL) {
print(changep);
amend(changep);
a = 1;
}
else {
printf("没有此学生，请重新输入\n");
a = 0;
}
}
UI();
break;
}//（4）完成
case COMMAND_SEARCH://查找学生信息
{
datestr idx;
cout << "请输入需要查找学生的学号" << endl;
scanf("%lld", &idx);
student* ffp;
ffp = find(&head, idx);
if (ffp != NULL)
{
print(ffp);
/*printf("name: % 6s | id : % 12lld | sex : % c |
major : % 8s \n", ffp->name, ffp->id, ffp->sex, ffp->major);*/
}
else
{
printf("没有此学生，请重新输入\n");
}
UI();
break;
}//（5）完成
case OMMAND_HELP://查看帮助
{
help();
UI();
break;
}//（6）完成
case COMMAND_QUIT://退出
{
UI();
break;
system("pause");
}//退出完成
default:
{
printf("输入错误，请重新输入\n");
UI();
}//完成
}
}
return 0;
}