实现下面功能
1.录入学生信息 2.打印学生信息
3.保存学生信息 4.读取学生信息
5.统计学生人数 6.查找学生信息
7.修改学生信息 8.删除学生信息
0.退出系统 输入有误,重新输入
运行结果
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<string.h>
typedef struct _student
{
char name[20];
int age;
int stuNum;
int score;
}student;
typedef struct _Node
{
student stu;
struct _Node* pNext;
}Node;
Node *g_pHead = NULL;
void weclome();
void Inputstudent();//录入学生信息
void printstudent();//打印学生信息
void savestudent();//保存学生信息
void Readstudent();//读取学生信息
int countstudent();//统计所有学生人数
Node* findstudent();//查找学生信息
void Nodeifystudent(); //修改学生信息
void Deletestudent(); //删除学生信息
int main()
{
system("color 1f");
while (1)
{
weclome();
char ch = getch();
switch (ch)
{
case '1':
Inputstudent();
break;
case '2':
printstudent();
break;
case '3':
savestudent();
break;
case '4':
Readstudent();
break;
case '5':
printf("学生总人数为:%d\n", countstudent());
system("pause");
system("cls");
break;
case '6':
{
Node* p = findstudent();
if (p != NULL)
{
printf("学号:%d\t姓名:%s\t年龄:%d\t成绩%d\t", p->stu.stuNum, p->stu.name, p->stu.age, p->stu.score);
}
else
printf("没有学生信息\n");
system("pause");
system("cls");//清屏
}
break;
case '7':
Nodeifystudent();
break;
case '8':
Deletestudent();
break;
case '9':
printf("Bye Bye!!!\n");
system("pause");
system("cls");//清屏
break;
default:
printf("你的输入有误,请重新输入.\n");
system("pause");
system("cls");//清屏
}
}
return 0;
}
void weclome()
{
printf("*************************************************\n");
printf("*\t欢迎使用高校学生成绩管理系统V1.0\t*\n");
printf("*************************************************\n");
printf("*\t\t请选择功能列表\t\t*\n");
printf("*************************************************\n");
printf("*\t1.录入学生信息\t 2.打印学生信息\t*\n");
printf("*\t3.保存学生信息\t 4.读取学生信息\t*\n");
printf("*\t5.统计学生人数\t 6.查找学生信息\t*\n");
printf("*\t7.修改学生信息\t 8.删除学生信息\t*\n");
printf("*\t0.退出系统\t\n");
printf("*************************************************\n");
}
void Inputstudent()
{
Node* pNewNode=(Node*)malloc(sizeof(Node));
pNewNode->pNext = NULL;
//头插法
if (g_pHead == NULL)
{
g_pHead = pNewNode;
}
else
{
pNewNode->pNext = g_pHead;
g_pHead = pNewNode;
}
printf("请输入学生的姓名\n");
scanf("%s", pNewNode->stu.name);
printf("请输入学生的年龄\n");
scanf("%d", &pNewNode->stu.age);
printf("请输入学生的学号\n");
scanf("%d", &pNewNode->stu.stuNum);
printf("请输入学生的成绩\n");
scanf("%d", &pNewNode->stu.score);
printf("学生信息录入成功\n");
system("pause");
system("cls");//清屏
}
void printstudent()
{
system("cls");//清屏
printf("****************************************************************\n");
printf("*\t欢迎使用高校学生成绩管理系统V1.0\t*\n");
printf("****************************************************************\n");
printf("*\t学号\t*\t姓名\t*\t年龄\t*\t成绩\t*\n");
printf("****************************************************************\n");
Node* p = g_pHead;
while (p!=NULL)
{
printf("*\t%d\t\t%s\t\t%d\t\t%d\t*\n",p->stu.stuNum,p->stu.name,p->stu.age,p->stu.score);
p = p->pNext;
}
system("pause");
system("cls");//清屏
}
void savestudent()//保存学生信息
{
FILE* fp = fopen("E:\chengjiguanlixitong", "w");
if (fp == NULL)
{
printf("打开文件失败\n");
return;
}
Node* p = g_pHead;
while (p!=NULL)
{
fwrite(&p->stu, 1, sizeof(student), fp);
p = p->pNext;
}
fclose(fp);
printf("\n数据保存成功\n");
system("pause");
system("cls");
}
void Readstudent()//读取学生信息
{
FILE *fp = fopen("E:\chengjiguanlixitong", "r");
if (fp == NULL)
{
printf("打开文件失败\n");
return;
}
student stu;
while (fread(&stu,1,sizeof(student),fp))
{
Node* pNewNode = (Node*)malloc(sizeof(Node));
//fread(&pNewNode->stu, 1, sizeof(student), fp);
pNewNode->pNext = NULL;
memcpy(pNewNode, &stu, sizeof(student));
if (g_pHead == NULL)
{
g_pHead = pNewNode;
}
else
{
pNewNode->pNext = g_pHead;
g_pHead = pNewNode;
}
}
fclose(fp);
printf("加载数据成功\n");
system("pause");
system("cls");
}
int countstudent()
{
int ncount = 0;
Node*p = g_pHead;
while (p!=NULL)
{
ncount++;
p = p->pNext;
}
return ncount;
}
Node* findstudent()
{
int nstuNum;
char szName[20];
printf("请输入查找学生的学号:\n");
scanf("%d", &nstuNum);
printf("请输入查找学生的姓名:\n");
scanf("%s", &szName);
Node*p = g_pHead;
while (p!=NULL)
{
if (p->stu.stuNum == nstuNum || 0 == strcmp(p->stu.name, szName))
return p;
p->pNext;
}
return NULL;
}
void Nodeifystudent()
{
int nstuNum;
printf("请输入修改学生的学号:\n");
scanf("%d", &nstuNum);
Node*p = g_pHead;
while ( p != NULL)
{
if (p->stu.stuNum == nstuNum)
{
printf("请输入要修改学生的姓名 年龄 成绩:\n");
scanf("%s %d %%d", p->stu.name, &p->stu.age, &p->stu.score);
printf("修改成功\n");
break;
}
p->pNext;
}
if (p == NULL)
{
printf("没有找到该学生信息,\n");
}
system("pause");
system("cls");
}
void Deletestudent()//删除学生信息、从链表删除节点
{
int nstuNum;
printf("请输入要删除学生的学号:\n");
scanf("%d", &nstuNum);
Node * p1, *p2;
if (g_pHead->stu.stuNum == nstuNum)
{
p1 = g_pHead;
g_pHead = g_pHead->pNext;
free(p1);
system("pause");
system("cls");
return;
}
Node*p = g_pHead;
while (p->pNext != NULL)
{
if (g_pHead->stu.stuNum == nstuNum)
{
p2 = p->pNext;
p->pNext = p->pNext->pNext;
free(p2);
system("pause");
system("cls");
return;
}
p = p->pNext;
if (p->pNext==NULL)
{
break;
}
}
if (p->pNext == NULL)
{
printf("没有找到该学员:\n");
}
system("pause");
system("cls");
}