请各位设计一个单链表内容如下
帮忙解答一下谢谢各位大神
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char filename[20] = {0};
typedef struct Student
{
int num;
char name[10];
float chinese;
float math;
float english;
float total;
struct Student *next;
} STU;
int MainInterface()
{
int key;
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 欢迎来到学生成绩管理系统 |\n");
printf("\t\t\t|===========================================|\n");
printf("\t\t\t| |\n");
printf("\t\t\t| 1.录入学员 |\n");
printf("\t\t\t| 2.查找学员 |\n");
printf("\t\t\t| 3.删除学员 |\n");
printf("\t\t\t| 4.修改成绩 |\n");
printf("\t\t\t| 5.打开文件 |\n");
printf("\t\t\t| 0.退出系统 |\n");
printf("\t\t\t| |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请选择:");
scanf("%d", &key);
return key;
}
STU *CreateList()
{
STU *p = (STU *)malloc(sizeof(STU));
if (p != NULL)
p->next = NULL;
return p;
}
int NumIsExist(STU *plist, int num)
{
plist = plist->next;
while (plist != NULL)
{
if (plist->num == num)
return 1;
plist = plist->next;
}
return 0;
}
void InsertStu(STU *plist)
{
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在录入学员信息 |\n");
printf("\t\t\t=============================================\n");
STU *p = plist;
int count = 0;
printf("\t\t\t请问需要添加多少学员:");
scanf("%d", &count);
if (count <= 0)
return;
for (int i = 0; i < count; i++)
{
STU *pnew = (STU *)malloc(sizeof(STU));
if (pnew == NULL)
return;
printf("\t\t\t请输入学生学号:");
scanf("%d", &pnew->num);
while (1)
{
if (NumIsExist(plist, pnew->num))
{
printf("\t\t\t学号重复,请重新输入学号:");
scanf("%d", &pnew->num);
}
else
break;
}
printf("\t\t\t请输入学生姓名:");
scanf("%s", pnew->name);
printf("\t\t\t请输入语文成绩:");
scanf("%f", &pnew->chinese);
printf("\t\t\t请输入数学成绩:");
scanf("%f", &pnew->math);
printf("\t\t\t请输入英语成绩:");
scanf("%f", &pnew->english);
pnew->total = pnew->chinese + pnew->math + pnew->english;
pnew->next = NULL;
//头插法? 尾插法? 任意位置插入?
p = plist;
while (p->next != NULL)
{
if (pnew->num < p->next->num)
{
pnew->next = p->next;
p->next = pnew;
break;
}
p = p->next;
}
p->next = pnew;
}
}
void SerchByNum(STU *plist)
{
int num = 0;
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在查找学员信息 |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请输入学员学号:");
scanf("%d", &num);
while (plist != NULL)
{
if (plist->num == num)
{
printf("\t\t\t学号\t姓名\t语文\t数学\t英语\t总分\n");
printf("\t\t\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
plist->num, plist->name, plist->chinese,
plist->math, plist->english, plist->total);
printf("\t\t\t");
system("pause");
return;
}
plist = plist->next;
}
printf("\t\t\t没有找到该学生!!\n");
printf("\t\t\t");
system("pause");
}
void SerchByName(STU *plist)
{
char name[10] = {0};
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在查找学员信息 |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请输入学员姓名:");
scanf("%s", &name);
int n = 1;
while (plist != NULL)
{
if (strcmp(name, plist->name) == 0)
{
if (n)
{
printf("\t\t\t学号\t姓名\t语文\t数学\t英语\t总分\n");
n = 0;
}
printf("\t\t\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
plist->num, plist->name, plist->chinese,
plist->math, plist->english, plist->total);
}
plist = plist->next;
}
if (n)
printf("\t\t\t没有找到该学生!!\n");
printf("\t\t\t");
system("pause");
}
void SerchAllStu(STU *plist)
{
plist = plist->next;
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在查找学员信息 |\n");
printf("\t\t\t=============================================\n");
if (plist == NULL)
{
printf("\t\t\t没有学员信息!\n");
printf("\t\t\t");
system("pause");
return;
}
printf("\t\t\t学号\t姓名\t语文\t数学\t英语\t总分\n");
while (plist != NULL)
{
printf("\t\t\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
plist->num, plist->name, plist->chinese,
plist->math, plist->english, plist->total);
plist = plist->next;
}
printf("\t\t\t");
system("pause");
}
void SerchMain(STU *plist)
{
int key;
do
{
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在查找学员信息 |\n");
printf("\t\t\t|===========================================|\n");
printf("\t\t\t| |\n");
printf("\t\t\t| 1.按学号查找 |\n");
printf("\t\t\t| 2.按姓名查找 |\n");
printf("\t\t\t| 3.查看所有项 |\n");
printf("\t\t\t| 0.返回主菜单 |\n");
printf("\t\t\t| |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请选择:");
scanf("%d", &key);
switch (key)
{
case 1:
SerchByNum(plist);
break;
case 2:
SerchByName(plist);
break;
case 3:
SerchAllStu(plist);
break;
}
} while (key != 0);
}
void DeleteStu(STU *plist)
{
int num = 0;
char key = '\0';
STU *pre = plist;
STU *p = plist->next;
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在准备删除信息 |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请输入需要删除的学号:");
scanf("%d", &num);
while (p != NULL)
{
if (p->num == num)
{
printf("\t\t\t学号\t姓名\t语文\t数学\t英语\t总分\n");
printf("\t\t\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
p->num, p->name, p->chinese,
p->math, p->english, p->total);
printf("\t\t\t是否删除? [Y/N] : ");
getchar();
scanf("%c", &key);
if (key == 'N' || key == 'n')
return;
else if (key == 'Y' || key == 'y')
{
pre->next = p->next;
free(p);
p = NULL;
printf("\t\t\t删除成功!!\n");
printf("\t\t\t");
system("pause");
return;
}
}
pre = pre->next;
p = p->next;
}
printf("\t\t\t没有找到该学生!!\n");
printf("\t\t\t");
system("pause");
}
void ModifyStu(STU *plist)
{
int num = 0;
STU *p = plist->next;
char key = '\0';
system("cls");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 正在准备修改信息 |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请输入需要修改的学号:");
scanf("%d", &num);
while (p != NULL)
{
if (num == p->num)
{
printf("\t\t\t学号\t姓名\t语文\t数学\t英语\t总分\n");
printf("\t\t\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
p->num, p->name, p->chinese,
p->math, p->english, p->total);
printf("\t\t\t是否修改? [Y/N] : ");
getchar();
scanf("%c", &key);
if (key == 'N' || key == 'n')
return;
else if (key == 'Y' || key == 'y')
{
printf("\n\t\t\t==============\n");
printf("\t\t\t1.修改姓名\n\t\t\t2.修改语文\n\t\t\t3.修改数学\n\t\t\t4.修改英语\n\t\t\t0.返回\n");
printf("\t\t\t==============\n");
printf("\t\t\t请选择:");
getchar();
scanf("%c", &key);
if (key == '1')
{
printf("\t\t\t新的姓名:");
scanf("%s", p->name);
}
else if (key == '2')
{
printf("\t\t\t新的语文成绩:");
scanf("%f", &p->chinese);
}
else if (key == '3')
{
printf("\t\t\t新的数学成绩:");
scanf("%f", &p->math);
}
else if (key == '4')
{
printf("\t\t\t新的英语成绩:");
scanf("%f", &p->english);
}
else if (key == '0')
return;
printf("\t\t\t修改后的信息如下:\n");
printf("\t\t\t学号\t姓名\t语文\t数学\t英语\t总分\n");
printf("\t\t\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
p->num, p->name, p->chinese,
p->math, p->english, p->total);
printf("\t\t\t");
system("pause");
return;
}
}
p = p->next;
}
printf("\t\t\t没有找到该学员!!\n");
printf("\t\t\t");
system("pause");
}
STU *OpenStuFile()
{
char c;
STU *pstu = NULL;
STU *ptem = NULL;
FILE *fp = NULL;
while (1)
{
system("cls");
printf("\n\n");
printf("\n\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t| 欢迎来到学生成绩管理系统 |\n");
printf("\t\t\t| |\n");
printf("\t\t\t| 【肖萧然最秀】 |\n");
printf("\t\t\t=============================================\n");
printf("\t\t\t请输入班级(如:3年2班):");
scanf("%s", filename);
fp = fopen(filename, "rb+");
if (fp != NULL)
break; //打开成功
printf("\t\t\t文件不存在!是否创建该文件? [Y/N] : ");
getchar();
scanf("%c", &c);
if (c == 'Y' || c == 'y')
{
fp = fopen(filename, "wb+");
if (fp != NULL)
break;
else
continue;
}
else
continue;
}
pstu = CreateList();
while (1)
{
STU *pnew = (STU *)malloc(sizeof(STU));
pnew->next = NULL;
if (fscanf(fp, "%d\t%s\t%f\t%f\t%f\t%f\n",
&pnew->num, pnew->name, &pnew->chinese,
&pnew->math, &pnew->english, &pnew->total) == EOF)
{
free(pnew);
pnew = NULL;
break;
}
//头插法? 尾插法? 任意位置插入?
ptem = pstu;
while (ptem->next != NULL)
{
if (pnew->num < ptem->next->num)
{
pnew->next = ptem->next;
ptem->next = pnew;
break;
}
ptem = ptem->next;
}
ptem->next = pnew;
}
fclose(fp);
return pstu;
}
void CloseStuFile(STU *plist)
{
FILE *fp = NULL;
plist = plist->next;
//只写方式打开文件
if ((fp = fopen(filename, "wb+")) == NULL)
{
printf("打开文件失败!");
}
else
{
//遍历链表输出到文件
while (plist != NULL)
{
fprintf(fp, "%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
plist->num, plist->name, plist->chinese,
plist->math, plist->english, plist->total);
plist = plist->next;
}
}
fclose(fp);
}
int main()
{
int key = -1;
STU *pList = NULL;
pList = OpenStuFile(); //初始化链表
while (key != 0)
{
key = MainInterface();
switch (key)
{
case 1:
InsertStu(pList);
break;
case 2:
SerchMain(pList);
break;
case 3:
DeleteStu(pList);
break;
case 4:
ModifyStu(pList);
break;
case 0:
CloseStuFile(pList);
break;
}
}
return 0;
}