#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 ChineseSort2 MathSort3 EnglishSort4 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);}elseputs("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");elseprintf("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");elseprintf("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");elseprintf("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;elsestu.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");elsefwrite(&stu,sizeof(stu),1,fp2);}elsefwrite(&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);}elsefwrite(&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);}//---------------------------------------------------------AboutCoursevoid 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++;}elsefail++;}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++;}elsefail++;}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++;}elsefail++;}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;}
