C语言实现课程设计
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#include<stdio.h> #include<stdlib.h> #include<string.h> #include<algorithm> #include<conio.h> #define H "--------------------------------------------------------------------------\n" #define H0 "------------------------------------------------------------------------------\n" #define H1 "| 学号 | 姓名 | 系别 | 班级 |语文 |数学 | 英语 | 总成绩 |\n" #define H2 "|-----------|--------|-------|----------|-------|-------|-------|--------|\n" #define H3 "|------------------|------------------|-------------------|-----------------|\n" #define H4 "| 学号 | 姓名 | 系别 | 班级 |语文 |数学 | 英语 | 总成绩 |名次\n" #define H5 "|-----------|--------|-------|----------|-------|-------|-------|--------|----\n" struct subject { double math; double english; double chinese; }; struct student { char name[20];//姓名 char num[20]; //学号 char cla[20]; //班级 char dept[20]; //系别 struct subject sub; //课程 double sum; //总成绩 }students[500]; bool cmp1(student s1,student s2) //语文成绩比较 { return s1.sub.chinese>s2.sub.chinese; } bool cmp2(student s1,student s2)//数学成绩比较 { return s1.sub.math>s2.sub.math; } bool cmp3(student s1,student s2) //英语成绩比较 { return s1.sub.english>s2.sub.english; } bool cmp4(student s1,student s2) //总成绩比较 { return s1.sum>s2.sum; } int Sort(int cmd) //成绩比较函数 { student stu; FILE *fp=fopen("D:\\inform.txt","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; } char menu()//菜单选择函数 { char n; system("CLS");//清屏 puts("\n"); puts("\t\t O(∩_∩)O~~ 欢迎来到学生成绩管理分析系统\n"); puts("\t\t╔*☆***◎***◇***☆*** 菜单 ***☆***◇***◎***☆*╗\n"); puts("\t\t|☆|\t\t 1.学生信息录入\t\t\t|☆|\n"); puts("\t\t|★|\t\t 2.学生信息显示\t\t\t|★|\n"); puts("\t\t|☆|\t\t 3.学生信息查询\t\t\t|☆|\n"); puts("\t\t|★|\t\t 4.学生信息修改\t\t\t|★|\n"); puts("\t\t|☆|\t\t 5.学生信息删除\t\t\t|☆|\n"); puts("\t\t|★|\t\t 6.学生成绩分析\t\t\t|★|\n"); puts("\t\t|☆|\t\t 7.退出\t\t\t\t|☆|\n"); puts("\t\t╚*☆***◎***◇****☆****★****☆****◇***◎***☆*╝\n"); printf("\t请选择您要实现的功能选项 (1-7): [ ]\b\b"); while(1) { n=getchar();getchar(); if(n<'1'||n>'7') printf("输入错误，请您重新输入选项(1-7):[ ]\b\b"); else break; } return n; } void Append()//信息输入函数 { struct student stu; FILE * fp; char ch; if((fp=fopen("D:\\inform.txt","ab"))==NULL) { printf("\tCan not open the inform file!"); getch(); exit(1); } do { printf("\t请输入学号:");gets(stu.num); printf("\t请输入姓名:");gets(stu.name); printf("\t请输入系院:");gets(stu.dept); printf("\t请输入班级:");gets(stu.cla); printf("\t请按顺序输入学生的语文成绩，数学成绩和英语成绩："); scanf("%lf%lf%lf",&stu.sub.chinese,&stu.sub.math,&stu.sub.english); stu.sum=stu.sub.chinese+stu.sub.math+stu.sub.english; fwrite(&stu,sizeof(stu),1,fp); printf("\t是否继续添加?(Y/N):[ ]\b\b"); getchar(); ch=getchar(); getchar(); }while(ch=='Y'||ch=='y'); fclose(fp); } void print1() //输出函数 { printf(H); printf(H1); printf(H2); } void print2(struct student stu) //输出函数 { printf("|%-11s|%-8s|%-7s|%-10s|%-7.2lf|%-7.2lf|%-7.2lf|%-8.2lf|\n",stu.num,stu.name,stu.dept,stu.cla,stu.sub.chinese,stu.sub.math,stu.sub.english,stu.sum); printf(H2); } void Display() //信息显示函数 { struct student stu; FILE *fp; int total=0; if((fp=fopen("D:\\inform.txt","rb"))==NULL) { printf("\tCan not open the inform file!"); getch(); exit(1); } while(fread(&stu,sizeof(stu),1,fp)==1) { total++; if(total==1)print1(); print2(stu); } fclose(fp); printf("\n\n\tThere are %d record in all!",total); printf("\n\n\tPress any key to continue......"); getch(); } void Search() //信息查询函数 { struct student stu; FILE *fp; int flag; int total=0; char ch[10]; char f; if((fp=fopen("D:\\inform.txt","rb"))==NULL) { printf("\tCan not open the inform file!"); getch(); exit(1); } do { rewind(fp); printf("\n\n\t1:按学号查询\n\t2:按姓名查询\n\t3:按系院查询\n\t4:按班级查询\n\t\t\t[ ]\b\b"); while(1) { scanf("%d",&flag);getchar(); if(flag<1||flag>4) { printf("输入错误，请您重新输入\n"); printf("\n1:按学号查询\n 2:按姓名查询\n 3:按系院查询\n 4:按班级查询\n):[ ]\b\b"); } else break; } if(flag==1) { printf("请输入您想要查询的学号:"); gets(ch); total=0; while(fread(&stu,sizeof(stu),1,fp)==1) if(strcmp(ch,stu.num)==0) { total++; if(total==1)print1(); print2(stu); } } if(flag==2) { printf("请输入您想要查询的姓名:"); gets(ch); total=0; while(fread(&stu,sizeof(stu),1,fp)==1) if(strcmp(ch,stu.name)==0) { total++; if(total==1)print1(); print2(stu); } } if(flag==3) { printf("请输入您想要查询的系院:"); gets(ch); total=0; while(fread(&stu,sizeof(stu),1,fp)==1) if(strcmp(ch,stu.dept)==0) { total++; if(total==1)print1(); print2(stu); } } if(flag==4) { printf("请输入您想要查询的班级:"); gets(ch); total=0; while(fread(&stu,sizeof(stu),1,fp)==1) if(strcmp(ch,stu.cla)==0) { total++; if(total==1)print1(); print2(stu); } } printf("\n\n\tThere are %d record include!\n",total); printf("Search any more?(Y/N):[ ]\b\b"); f=getchar();getchar(); }while(f=='Y'||f=='y'); fclose(fp); } void Modify() //信息修改函数 { struct student stu; FILE *fp1,*fp2; int flag; char ch[15]; char f; do { if((fp1=fopen("D://inform.txt","rb"))==NULL) { printf("\tCan not open the inform file!"); getch(); exit(1); } if((fp2=fopen("D://temp.txt","wb"))==NULL) { printf("\tCan not creat the temp file!"); getch(); exit(1); } printf("请输入您想要修改信息的学号:"); gets(ch); flag=0; while(fread(&stu,sizeof(stu),1,fp1)==1) { if(strcmp(ch,stu.num)==0) { print1(); print2(stu); printf("\n\n请输入新的信息:\n"); printf("\t学号:");gets(stu.num); printf("\t姓名:");gets(stu.name); printf("\t系别:");gets(stu.dept); printf("\t班级:");gets(stu.cla); printf("\t请按顺序输入语文成绩、数学成绩、英语成绩:"); scanf("%lf%lf%lf",&stu.sub.chinese,&stu.sub.math,&stu.sub.english); stu.sum=stu.sub.chinese+stu.sub.math+stu.sub.english; getchar(); flag=1; } fwrite(&stu,sizeof(stu),1,fp2); } fclose(fp1); fclose(fp2); if(flag==1) { printf("修改成功!\n"); remove("D://inform.txt"); rename("D://temp.txt","D://inform.txt"); } else printf("对不起 %>_<%，找不到这项纪录!\n"); printf("是否要修改更多的信息?(Y/N):[ ]\b\b"); f=getchar(); getchar(); }while(f=='Y'||f=='y'); } void Delete() //信息删除函数 { struct student stu; FILE *fp1,*fp2; int flag; char ch[10]; char f; do { if((fp1=fopen("D://inform.txt","rb"))==NULL) { printf("\tCan not open the inform file!"); getchar(); exit(1); } if((fp2=fopen("D://temp.txt","wb"))==NULL) { printf("\tCan not creat the temp file!"); getch(); exit(1); } printf("请输入您想要删除信息的学号:"); gets(ch); flag=0; while(fread(&stu,sizeof(stu),1,fp1)==1) { if(strcmp(ch,stu.num)==0) { print1(); print2(stu); flag=1; } else fwrite(&stu,sizeof(stu),1,fp2); } fclose(fp1); fclose(fp2); if(flag==1) { printf("删除成功!\n"); remove("D://inform.txt"); rename("D://temp.txt","D://inform.txt"); } else printf("Can not find this record!\n"); printf("Delete any more?(Y/N):[ ]\b\b"); f=getchar(); getchar(); }while(f=='Y'||f=='y'); } void Analyse() //信息分析函数 { struct student stu; FILE *fp; int flag,flag1; int total=0; int pass=0,fail=0,better=0; char ch[10]; char f; if((fp=fopen("D://inform.txt","rb"))==NULL) { printf("\tCan not open the inform file!"); getch(); exit(1); } do { rewind(fp); printf("\n\n\t1:课程成绩分析\n\t2:班级成绩分析\n\t3:院系成绩分析\n\t\t请选择：[ ]\b\b"); while(1) { scanf("%d",&flag);getchar(); if(flag<1||flag>3) { printf("输入错误，请您重新输入\n"); printf("\n\n\t1:课程成绩分析\n\t2:班级成绩分析\n\t3:院系成绩分析\n\t\t请选择：[ ]\b\b"); } else break; } if(flag==1) { printf("\n\n\t1:语文成绩分析\n\t2:数学成绩分析\n\t3:英语成绩分析\n\t4:总成绩排名\n"); printf("\t\t请选择:[ ]\b\b"); scanf("%d",&flag1);getchar(); if(flag1<1||flag1>4) { printf("\n\t\t输入错误，请您重新输入\n"); printf("\n\n\t1:语文成绩分析\n\t2:数学成绩分析\n\t3:英语成绩分析\n\t4:总成绩排名\n\t\t\t[ ]\b\b"); } if(flag1==1) { total=0; //总人数 pass=0; //及格人数 fail=0; //不及格人数 better=0; //优秀人数 int cnt=Sort(1); while(fread(&stu,sizeof(stu),1,fp)==1) { total+=stu.sub.chinese; if(stu.sub.chinese>=60) { pass++; if(stu.sub.chinese>=80) better++; } else fail++; } double ave=total/cnt; puts("语文成绩成绩分析："); 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,pass*100.0/cnt); printf(H3); printf(" %s %s %s %s\n","名次","姓名","学号","语文成绩"); printf(H3); for(int i=0;i<cnt;i++) { printf(" 第%2d名\t\t %-17s%-23s%-8.2lf\n",i+1,students[i].name,students[i].num,students[i].sub.chinese); printf(H3); } printf("平均分：%.2lf\n",ave); } if(flag1==2) { total=0;pass=0;fail=0;better=0; int cnt=Sort(2); while(fread(&stu,sizeof(stu),1,fp)==1) { total+=stu.sub.math; if(stu.sub.math>=60) { pass++; if(stu.sub.math>=80) better++; } else fail++; } double ave=total/cnt; puts("数学成绩成绩分析："); 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,pass*100.0/cnt); printf(H3); printf(" %s %s %s %s\n","名次","姓名","学号","数学成绩"); printf(H3); for(int i=0;i<cnt;i++) { printf(" 第%2d名\t\t %-17s%-23s%-8.2lf\n",i+1,students[i].name,students[i].num,students[i].sub.math); printf(H3); } printf("平均分：%.2lf\n",ave); } if(flag1==3) { total=0;pass=0;fail=0;better=0; int cnt=Sort(3); while(fread(&stu,sizeof(stu),1,fp)==1) { total+=stu.sub.english; if(stu.sub.english>=60) { pass++; if(stu.sub.english>=80) better++; } else fail++; } double ave=total/cnt; puts("英语成绩成绩分析："); 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,pass*100.0/cnt); printf(H3); printf(" %s %s %s %s\n","名次","姓名","学号","英语成绩"); printf(H3); for(int i=0;i<cnt;i++) { printf(" 第%2d名\t\t %-17s%-23s%-8.2lf\n",i+1,students[i].name,students[i].num,students[i].sub.english); printf(H3); } printf("平均分：%.2lf\n",ave); } if(flag1==4) { total=0;int cnt=Sort(4); puts("总成绩排名："); printf(H0);printf(H4);printf(H5); for(int i=0;i<cnt;i++) { printf("|%-11s|%-8s|%-7s|%-10s|%-7.2lf|%-7.2lf|%-7.2lf|%-8.2lf| %d\n",students[i].num,students[i].name,students[i].dept,students[1].cla,students[i].sub.chinese,students[i].sub.math,students[i].sub.english,students[i].sum,i+1); printf(H5); } } } if(flag==2) { int yu1,sh1,yi1,yu2,sh2,yi2; printf("请输入您想要查询的班级:"); gets(ch);//printf("%s\n",ch);system("pause"); int count=0;yu1=0;yu2=0;sh1=0;sh2=0;yi1=0;yi2=0; double yu=0,sh=0,yi=0; while(fread(&stu,sizeof(stu),1,fp)==1) if(strcmp(ch,stu.cla)==0) { count++; yu+=stu.sub.chinese; if(stu.sub.chinese>=60) { yu1++; if(stu.sub.chinese>=80) yu2++; } sh+=stu.sub.math; if(stu.sub.math>=60) { sh1++; if(stu.sub.math>=80) sh2++; } yi+=stu.sub.english; if(stu.sub.english>=60) { yi1++; if(stu.sub.english>=80) yi2++; } } printf(H3); printf(" %s班的语文 平均分: %.2lf 及格率: %.2lf%% 优秀率：%.2lf%%\n",ch,yu/count,yu1*100.0/count,yu2*100.0/count); printf(H3); printf(" %s班的高数 平均分: %.2lf 及格率: %.2lf%% 优秀率：%.2lf%%\n",ch,sh/count,sh1*100.0/count,sh2*100.0/count); printf(H3); printf(" %s班的英语 平均分: %.2lf 及格率: %.2lf%% 优秀率：%.2lf%%\n",ch,yi/count,yi1*100.0/count,yi2*100.0/count); printf(H3); } if(flag==3) {int yu1,sh1,yi1,yu2,sh2,yi2; printf("请输入您想要查询的系别:"); gets(ch); int count=0;yu1=0;yu2=0;sh1=0;sh2=0;yi1=0;yi2=0; double yu=0,sh=0,yi=0; while(fread(&stu,sizeof(stu),1,fp)==1) if(strcmp(ch,stu.dept)==0) { count++; yu+=stu.sub.chinese; if(stu.sub.chinese>=60) { yu1++; if(stu.sub.chinese>=80) yu2++; } sh+=stu.sub.math; if(stu.sub.math>=60) { sh1++; if(stu.sub.math>=80) sh2++; } yi+=stu.sub.english; if(stu.sub.english>=60) { yi1++; if(stu.sub.english>=80) yi2++; } } printf(H3); printf(" %s系的语文 平均分: %.2lf 及格率: %.2lf%% 优秀率：%.2lf%%\n",ch,yu/count,yu1*100.0/count,yu2*100.0/count); printf(H3); printf(" %s系的高数 平均分: %.2lf 及格率: %.2lf%% 优秀率：%.2lf%%\n",ch,sh/count,sh1*100.0/count,sh2*100.0/count); printf(H3); printf(" %s系的英语 平均分: %.2lf 及格率: %.2lf%% 优秀率：%.2lf%%\n",ch,yi/count,yi1*100.0/count,yi2*100.0/count); printf(H3); } printf("\nSearch any more?(Y/N):[ ]\b\b"); f=getchar();getchar(); }while(f=='Y'||f=='y'); fclose(fp); } int main() { system("color 0b"); while(1) { switch(menu()) { case '1':Append();break; case '2':Display();break; case '3':Search();break; case '4':Modify();break; case '5':Delete();break; case '6':Analyse();break; case '7':exit(0);break; } } return 0; } 阅读全文
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