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(c语言课程设计)学生成绩管理系统

2013年11月11日 ⁄ 综合 ⁄ 共 9251字 ⁄ 字号 评论关闭
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<conio.h>
#include<string.h>
#include<algorithm>
char buf[255];
char c=14;
char path[]="D:\\data";
char tmp[]="D:\\tmp";
struct Student
{
	char Name[20];
	char No[20];
	char Dept[20];
	char ClassNo[20];
	double Math,Chinese,English;
	double Ave;
	bool Pass;
}students[500];
bool cmp1(Student s1,Student s2)
{
	return s1.Chinese>s2.Chinese;
}
bool cmp2(Student s1,Student s2)
{
	return s1.Math>s2.Math;
}
bool cmp3(Student s1,Student s2)
{
	return s1.English>s2.English;
}
bool cmp4(Student s1,Student s2)
{
	return s1.Ave>s2.Ave;
}
//---------------------------------------------------------void Sort(int cmd)
/*
1 ChineseSort
2 MathSort
3 EnglishSort
4 AveSort
*/
int Sort(int cmd)
{
	Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=0;
	while((n=fread(&stu,sizeof(stu),1,fp)>0))
	{
		students[cnt++]=stu;
	}
	fclose(fp);
	switch(cmd)
	{
	case 1:
	std::sort(students,students+cnt,cmp1);
		break;
	case 2:
	std::sort(students,students+cnt,cmp2);
		break;
	case 3:
	std::sort(students,students+cnt,cmp3);
		break;
	case 4:
	std::sort(students,students+cnt,cmp4);
		break;
	default:
		exit(0);
	}
	return cnt;
}
//---------------------------------------------------------PrintTitle()
void PrintTitle()
{
	printf("%-8s%-12s%-12s%-8s%-7s%-7s%-7s%-7s%-s\n","姓名","班级","学号","系院","语文","数学","英语","平均分","及格");
}
//---------------------------------------------------------Print(Student stu)
void Print(Student stu)
{
	printf("%-8s%-12s%-12s%-8s%-7.2lf%-7.2lf%-7.2lf%-7.2lf%-s\n",stu.Name,stu.ClassNo,stu.No,stu.Dept,stu.Chinese,stu.Math,stu.English,stu.Ave,stu.Pass?"是":"否");
}
//---------------------------------------------------------PrintNo(char No[])
void PrintNo(char No[])
{
	Student stu;
	int n;
	bool find=0;
	FILE *fp=fopen(path,"ab+");//以ab+方式打开防止data文件不存在时发生错误
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{
		if(!strcmp(stu.No,No))
		{
			find=1;
			break;
		}
	}
	fclose(fp);
	if(find)
	{
		PrintTitle();
		Print(stu);
	}
	else
		puts("未找到!");
}
//---------------------------------------------------------PrintClass(char ClassNo[])
void PrintClass(char ClassNo[])
{
	Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=0;
	while((n=fread(&stu,sizeof(stu),1,fp)>0))
	{
		if(!strcmp(stu.ClassNo,ClassNo))
		{
			if(cnt==0)
				PrintTitle();
			Print(stu);
			cnt++;
		}
	}
	fclose(fp);
	if(cnt==0)
		puts("无数据");
	else
		printf("共%d条\n",cnt);
}
//---------------------------------------------------------PrintDept(char Dept[])
void PrintDept(char Dept[])
{
		Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=0;
	while((n=fread(&stu,sizeof(stu),1,fp)>0))
	{
		if(!strcmp(stu.Dept,Dept))
		{
			if(cnt==0)
				PrintTitle();
			Print(stu);
			cnt++;
		}
	}
	fclose(fp);
	if(cnt==0)
		puts("无数据");
	else
		printf("共%d条\n",cnt);
}
//---------------------------------------------------------PrintAll()
void PrintAll()
{
	Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=0;
	while((n=fread(&stu,sizeof(stu),1,fp)>0))
	{
		if(cnt==0)
			PrintTitle();
		Print(stu);
		cnt++;
	}
	fclose(fp);
	if(cnt==0)
		puts("无数据");
	else
		printf("共%d条\n",cnt);
}
//---------------------------------------------------------Input()
Student Input()
{
	Student stu;
	puts("请输入姓名、班级、学号、系院:");
	scanf("%s%s%s%s",&stu.Name,&stu.ClassNo,&stu.No,&stu.Dept);
	puts("请输入各科成绩:语文、数学、英语");
	scanf("%lf%lf%lf",&stu.Chinese,&stu.Math,&stu.English);
	stu.Ave=(stu.Chinese+stu.Math+stu.English)/3;
	if(stu.Chinese>=60&&stu.Math>=60&&stu.English>=60)
		stu.Pass=1;
	else
		stu.Pass=0;
	return stu;
}
//---------------------------------------------------------Insert()
void Insert()
{
	int cmd;
	do{
		Student stu=Input();
		FILE *fp=fopen(path,"ab+");
		fwrite(&stu,sizeof(stu),1,fp);
		fclose(fp);
		puts("录入成功");
		puts("继续录入吗?[1]是[0]否");
		scanf("%d",&cmd);
	}while(cmd==1);
}
//---------------------------------------------------------Del()
void Del()
{
	int cmd,cmd2;
	char No[20];
	do{
	puts("请输入要删除的学号:");
	scanf("%s",&No);
	Student stu;
	FILE *fp=fopen(path,"ab+");
	FILE *fp2=fopen(tmp,"wb");
	int n,find=0;
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{
		if(!strcmp(stu.No,No))
		{
			find=1;
			Print(stu);
			puts("确定要删除吗?[1]确定[0]取消");
			scanf("%d",&cmd2);
			if(cmd2==1)
				puts("已删除");
			else
				fwrite(&stu,sizeof(stu),1,fp2);
		}
		else
		fwrite(&stu,sizeof(stu),1,fp2);
	}
	fclose(fp);
	fclose(fp2);
	if(find==0)
	{
		printf("未找到学号%s\n",No);
		remove(tmp);
	}
	else
	{
		remove(path);
		rename(tmp,path);
	}
	puts("继续删除吗?[1]是[0]否");
	scanf("%d",&cmd);
	}while(cmd==1);
}
//---------------------------------------------------------Change()
void Change()
{	
	int cmd;
	char No[20];
	do{
	puts("请输入要更改的学号:");
	scanf("%s",&No);
	Student stu;
	int find=0;
	FILE *fp=fopen(path,"ab+");
	FILE *fp2=fopen(tmp,"wb");
	int n;
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{
		if(!strcmp(stu.No,No))
		{
			find=1;
			stu=Input();
			fwrite(&stu,sizeof(stu),1,fp2);
		}
		else
			fwrite(&stu,sizeof(stu),1,fp2);
	}
	fclose(fp);
	fclose(fp2);
	if(find)
	{
		remove(path);
		rename(tmp,path);
		puts("更改成功!");
	}
	else
	{
		printf("未找到学号%s\n",No);
		remove(tmp);
	}
	puts("继续更改吗?[1]是[0]否");
	scanf("%d",&cmd);
	}while(cmd==1);
}
//---------------------------------------------------------AboutCourse
void Chinese()
{
	double sum=0,ave;
	int pass=0,fail=0,better=0;
	Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=Sort(1);
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{
		sum+=stu.Chinese;
		if(stu.Chinese>=60)
			{
				pass++;
				if(stu.Chinese>=80)
					better++;
			}
		else
			fail++;
	}
	ave=sum/cnt;
	puts("语文成绩分析……");
	printf("共有%d学生\n优秀:%d人\n及格:%d人\n不及格:%d人\n及格率:%.2lf%%\n",cnt,better,pass,fail,100.0*pass/cnt);
	printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","语文");
	for(int i=0;i<cnt;i++)
	{
		printf("第%2d名  %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].Chinese);
	}
	printf("平均分:%.2lf\n",ave);
}
void Math()
{
	double sum=0,ave;
	int pass=0,fail=0,better=0;
	Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=Sort(2);
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{
		sum+=stu.Math;
		if(stu.Math>=60)
			{
				pass++;
				if(stu.Math>=80)
					better++;
			}
		else
			fail++;
	}
	ave=sum/cnt;
	puts("数学成绩分析……");
	printf("共有%d学生\n优秀:%d人\n及格:%d人\n不及格:%d人\n及格率:%.2lf%%\n",cnt,better,pass,fail,100.0*pass/cnt);
	printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","数学");
	for(int i=0;i<cnt;i++)
	{
		printf("第%2d名  %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].Math);
	}
	printf("平均分:%.2lf\n",ave);
}
void English()
{
	double sum=0,ave;
	int pass=0,fail=0,better=0;
	Student stu;
	FILE *fp=fopen(path,"ab+");
	int n,cnt=Sort(3);
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{	
		sum+=stu.English;
		if(stu.English>=60)
			{
				pass++;
				if(stu.English>=80)
					better++;
			}
		else
			fail++;
	}
	ave=sum/cnt;
	puts("英语成绩分析……");
	printf("共有%d学生\n优秀:%d人\n及格:%d人\n不及格:%d人\n及格率:%.2lf%%\n",cnt,better,pass,fail,100.0*pass/cnt);
	printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","英语");
	for(int i=0;i<cnt;i++)
	{
		printf("第%2d名  %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].English);
	}
	printf("平均分:%.2lf\n",ave);
}
void Average()
{
	Student stu;
	int n,cnt=Sort(4);
	double sum=0;
	FILE *fp=fopen(path,"ab+");
	while((n=fread(&stu,sizeof(stu),1,fp))>0)
	{	
		sum+=stu.Chinese;
		sum+=stu.Math;
		sum+=stu.English;
	}
	puts("平均成绩分析……");
	printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","平均成绩");
	for(int i=0;i<cnt;i++)
	{
		printf("第%2d名  %-10s%-12s%-8.2lf\n",i+1,students[i].Name,students[i].No,students[i].Ave);
	}
	printf("平均分:%.2lf\n",sum/cnt/3);
}
//---------------------------------------------------------Search()
void Search()
{
	int cmd,cmd2;
	while(1)
	{
		system("cls");
		puts("[1] 按学号查询");
		puts("[2] 按班级查询");
		puts("[3] 输出全部");
		puts("[4] 按系别查询");
		puts("[5] 课程分析");
		puts("[0] 返回主界面");
		scanf("%d",&cmd);
		if(cmd==0)
			break;
		switch(cmd)
		{
		case 1:
			{
			char No[20];
			puts("请输入要查询的学号:");
			scanf("%s",&No);
			PrintNo(No);
			}
			break;
		case 2:
			{
				char ClassNo[20];
				puts("请输入要查询班级号:");
				scanf("%s",&ClassNo);
				PrintClass(ClassNo);
			}
			break;
		case 3:
			PrintAll();
			break;
		case 4:
			{
				char Dept[20];
				puts("请输入要查询的系别:");
				scanf("%s",&Dept);
				PrintDept(Dept);
			}
			break;
		case 5:
			while(1)
			{
				puts("[1] 语文成绩分析");
				puts("[2] 数学成绩分析");
				puts("[3] 英语成绩分析");
				puts("[4] 平均成绩分析");
				puts("[0] 返回上一级");
				scanf("%d",&cmd2);
				if(cmd2==0)
					break;
				switch(cmd2)
				{
				case 1:
					Chinese();
					break;
				case 2:
					Math();
					break;
				case 3:
					English();
					break;
				case 4:
					Average();
					break;
				default:
					puts("不合法指令!");
				}
			}
			break;
		default:
			puts("不合法指令!");
		}
		while(1)
		{
			puts("[0] 返回");
			puts("[1] 录入");
			puts("[2] 删除");
			puts("[3] 修改");
			scanf("%d",&cmd2);
			if(cmd2==0)
				break;
			switch(cmd2)
			{
			case 1:
				Insert();
					break;
			case 2:
				Del();
				break;
			case 3:
				Change();
				break;
			default:
				puts("不合法指令!");
			}
		}
	}
}
//---------------------------------------------------------Menu()
void ShowMenu1()
{	
	int i;
	puts("");
	printf("                 ");
	for(i=0;i<14;i++)
		putchar(c);
	printf("成绩管理分析系统");
	for(i=0;i<14;i++)
		putchar(c);
	puts("");
	printf("               %c                                              %c\n",c,c);
	printf("                 %c                请输入指令                %c\n",c,c);
	printf("               %c                                              %c\n",c,c);
	printf("                 %c                [0] 退出                  %c\n",c,c);
	printf("               %c                                              %c\n",c,c);
	printf("                 %c                [1] 录入                  %c\n",c,c);
	printf("               %c                                              %c\n",c,c);
	printf("                 %c                [2] 删除                  %c\n",c,c);
	printf("               %c                                              %c\n",c,c);
	printf("                 %c                [3] 查询                  %c\n",c,c);
	printf("               %c                                              %c\n",c,c);
	printf("                 %c                [4] 更改                  %c\n",c,c);
	printf("               %c                                              %c\n",c,c);
	printf("                 ");
	for(i=0;i<44;i++)
		putchar(c);
	puts("");
}
void ShowMenu2()
{	
	int i;
	puts("");
	printf("                 ");
	for(i=0;i<14;i++)
		putchar(c);
	printf("成绩管理分析系统");
	for(i=0;i<14;i++)
		putchar(c);
	puts("");
	printf("                 %c                                          %c\n",c,c);
	printf("               %c                  请输入指令                  %c\n",c,c);
	printf("                 %c                                          %c\n",c,c);
	printf("               %c                  [0] 退出                    %c\n",c,c);
	printf("                 %c                                          %c\n",c,c);
	printf("               %c                  [1] 录入                    %c\n",c,c);
	printf("                 %c                                          %c\n",c,c);
	printf("               %c                  [2] 删除                    %c\n",c,c);
	printf("                 %c                                          %c\n",c,c);
	printf("               %c                  [3] 查询                    %c\n",c,c);
	printf("                 %c                                          %c\n",c,c);
	printf("               %c                  [4] 更改                    %c\n",c,c);
	printf("                 %c                                          %c\n",c,c);
	printf("                 ");
	for(i=0;i<44;i++)
		putchar(c);
	puts("");
}
//---------------------------------------------------------void RandColor()
void RandColor()
{
	int a,b;
	char param[20]="color ",param2[10];
	do{
		a=rand()%16;
		b=rand()%16;
	}while(a==b);
	sprintf(param2,"%x%x",a,b);
	strcat(param,param2);
	system(param);
}
//---------------------------------------------------------main()
int main()
{
	int cmd;
	srand(time(NULL));
	for(int i=0;i<8;i++)
	{
	RandColor();
	system("cls");
	ShowMenu1();
	system("cls");
	ShowMenu2();
	}
	system("color 0a");
	while(1)
	{
		system("cls");
		ShowMenu1();
		printf("[ ]\b\b");
		scanf("%d",&cmd);
		if(cmd==0)
			break;
		switch(cmd)
		{
		case 1:
			Insert();
			break;
		case 2:
			Del();
			break;
		case 3:
			Search();
			break;
		case 4:
			Change();
			break;
		default:
			puts("命令不合法!");
		}
	}
	return 0;
}

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