Day 29 教务系统（结构体版）

#include<stdio.h>
#include<string.h>
#include<conio.h>
#include"haifeng.h"
#define N 100
#define USER 12
#define PSW 16
#define INCREASE_SCORE 1
#define SEARCH_ALL     2
#define SEARCH_SCORE   3
#define MAX_SCORE 4
#define MIN_SCORE 5
#define AVE_SCORE 6
#define MODIFY_SCORE 7
#define EXIT 8 
typedef struct
{
	int state;
	char username[USER];
	char password[PSW];
}COUNT;

typedef struct
{
	int id;
	char name[20];
	float score;
}STU;

void registered(COUNT *p);
int loginOrEnroll();
int login(int *p);
int menu();
void insertScore(STU *p, int a);
void searchAll();
void searchScore();
void maxScore();
void minScore();
void aveScore();
void modifyScore(STU *p, int a);

COUNT count[N];
STU stu[N];

int numc = 0;
int nums = 0;

int main()
{
	int option;
	int flag = 0;
	int a = 0;
	int *pa = &a;
	while(1)
	{
		option = loginOrEnroll();
		switch(option)
		{
		case 1:
		flag = login(pa);
			break;
		case 2:
			registered(count);
			break;	
		}
		if(flag == 1)
		{
			printf("%d\n", a);
			break;
		}	
	}
	while(option != 8)
	{
		option = menu();
		switch(option)
		{
			case INCREASE_SCORE:
				insertScore(stu, a);
				break;
			case SEARCH_ALL:
				searchAll();
				break;
			case SEARCH_SCORE:
				searchScore();
				break;
			case MAX_SCORE:
				maxScore();
				break;
			case MIN_SCORE:
				minScore();
				break;
			case AVE_SCORE:
				aveScore();
				break;
			case MODIFY_SCORE:
				modifyScore(stu, a);
				break;
			case EXIT:
				break;
			default:
				printf("您的输入有误请重新输入\n"); 			
		}
	}	
	printf("感谢使用！");

	
	return 0;
}

int loginOrEnroll()//注册登录界面 
{
	int option;
	printf("************欢迎进入海峰考务系统****************\n");
	printf("		1.登录\n"); 
	printf("		2.注册\n"); 
	printf("*************************************************\n");
	printf("请选择："); 
	scanf("%d",&option);
	return option;	
}

void registered(COUNT *p)//注册
{
	char paw[PSW];
	int flag = 0; 
	if(numc < N)
	{
		printf("你是老师还是学生(学生扣0，老师扣1):\n");
		scanf("%d", &p[numc].state);
		printf("请输入新的账号(6~10位):\n");
		getchar();
		gets(p[numc].username);
		while(flag == 0)
		{	
			printf("请输入你的密码:\n");
			for(int i = 0; i < PSW; i++)
			{
				p[numc].password[i] = getch();
				if(p[numc].password[i] == '\r') break;
				printf("*");
			}
			printf("\n请再次输入密码:\n");
			for(int i = 0; i < PSW; i++)
			{
				paw[i] = getch();
				if(paw[i] == '\r') break;
				printf("*");
			}
			if(strcmp(paw, p[numc].password) == 0)
			{
				flag = 1;
				printf("\n注册成功!\n");
				numc++;
			}
			else
			{
				printf("\n密码两次不匹配，请重新输入\n"); 
			}
		}	
	}
	else
	{
		printf("账户已满!\n");
	}	
}

int login(int *p)//登录 
{
	int flag = 0;
	char usrname[USER];
	char psw[PSW]; 
	getchar();
	printf("请输入账号:\n");
	gets(usrname);
	printf("请输入密码:\n");
	for(int i = 0; i < PSW; i++)
	{
		psw[i] = getch();
		if(psw[i] == '\r') break;
		printf("*");
	}
	for(int i = 0; i < numc; i++)
	{
		if(strcmp(usrname, count[i].username) == 0 && strcmp(psw, count[i].password) == 0)
		{
			*p = i;
			flag = 1;
			break;
		}
	}
	if(flag == 1)
	{
		printf("\n登录成功！\n");
		return flag;
	}
	else
	{
		printf("\n登陆失败\n");
		return flag;
	}
	
	
	
	
} 
int menu()//菜单界面 
{
	int option;
	printf("************欢迎进入海峰考务系统****************\n");
	printf("		1.添加学生成绩\n");
	printf("		2.查看所有学生成绩\n");
	printf("		3.根据学号查看成绩\n");
	printf("		4.查看成绩最高分和学号\n");
	printf("		5.查看成绩最低分和学号\n");
	printf("		6.查看成绩平均分\n");
	printf("		7.根据学号修改成绩\n");
	printf("		8.退出 \n");
	printf("*************************************************\n");
	printf("请选择："); 
	scanf("%d",&option);
	return option;
}
void insertScore(STU *p, int a)//添加学生信息 
{
	int num; 
	if(count[a].state == 1)
	{
		if(nums < N)
		{
			printf("请输入你想输入几条信息\n");
			scanf("%d", &num); 
			for(int i = 0; i < num; i++)
			{
				printf("请输入第%d个学生的学号，姓名，成绩（用空格隔开）:\n", i + 1);
				scanf("%d%s%f", &p[nums].id, p[nums].name, &p[nums].score);
				nums++;
			}
			printf("添加成功！\n");	
		}
		else
		{
			printf("学生信息已满！\n");
		}	
	}
	else
	{
		printf("您无权做次操作\n");
	}
}
void searchAll()//查询所有学生成绩 
{
	for(int i = 0; i < nums; i++)
	{
		printf("学号：%d, 姓名：%s, 成绩：%1.f\n", stu[i].id, stu[i].name, stu[i].score);	
	}	
}
void searchScore()//根据学号查询信息 
{
	int num;
	printf("请输入学号:\n");
	scanf("%d", &num);
	for(int i = 0; i < nums; i++)
	{
		if(num == stu[i].id)
		{
			printf("学号：%d, 姓名：%s, 成绩：%1.f\n", stu[i].id, stu[i].name, stu[i].score);
		}
	}
}
void maxScore()//最高分的信息 
{
	int max = stu[0].score;
	for(int i = 0; i < nums; i++)
	{
		if(max < stu[i].score)
		{
			max = stu[i].score;	
		}	
	}
	for(int i = 0; i < nums; i++)
	{
		if(stu[i].score == max)
		{
			printf("学号：%d, 姓名：%s, 成绩：%1.f\n", stu[i].id, stu[i].name, stu[i].score);
		}	
	}	
}
void minScore()//最低分的信息 
{
	int min = stu[0].score;
	for(int i = 0; i < nums; i++)
	{
		if(min > stu[i].score)
		{
			min = stu[i].score;	
		}	
	}
	for(int i = 0; i < nums; i++)
	{
		if(stu[i].score == min)
		{
			printf("学号：%d, 姓名：%s, 成绩：%1.f\n", stu[i].id, stu[i].name, stu[i].score);
		}	
	}		
}
void aveScore()//平均分
{
	int sum = 0;
	for(int i = 0; i < nums; i++)
	{
		sum += stu[i].score;	
	}
	printf("本次考试的平均分是:%d\n", sum / nums);	
} 
void modifyScore(STU *p, int a)//修改信息 
{
	int num;
	if(count[a].state == 1)
	{
		printf("请输入要修改信息的学号:\n");
		scanf("%d", &num);
		for(int i = 0; i < nums; i++)
		{
			if(num == stu[i].id)
			{
				printf("他的信息是");
				printf("学号：%d, 姓名：%s, 成绩：%1.f\n", p[i].id, p[i].name, p[i].score);
				printf("请输入你要修改的信息:\n");
				scanf("%d%s%f", &p[nums].id, p[nums].name, &p[nums].score);
				printf("修改成功！\n");
				break;
			}
		}
	}
	else
	{
		printf("你无权修改信息\n");	
	} 
}