c语言课程设计学生成绩管理系统_1

学生成绩管理系统 学生成绩管理系统的设计与实现报告内容1、每一条记录包括一个学生的学号、姓名、3门课成绩、平均成绩。2、输入功能：可以一次完成若干条记录的输入。3、显示功能：完成全部学生记录的显示。4、查找功能：完成按姓名查找学生记录，并显示。5、排序功能：按学生平均成绩进行排序。6、插入功能：按平均成绩高低插入一条学生记录7 删除功能：如果输入错误，可以删除学生记录；8 退出。代码如下:#include stdio.h#include conio.h#include string.hint n=0;struct studentint num;char name10;int score3;float avg;stu1000;main() for(;) switch(print() case 0:printf(nnPlease,choose the number form 1 to 8n);break; case 1:creat();break; case 2:display();break; case 3:find();break; case 4:sort();break; case 5:add();break; case 6:del();break; case 7:save();break; case 8:exit(0); printf(nnn put any key to the menu.n); getch(); print() char s3; int c; clrscr();printf(nnn *MENU*n);printf( | |n);printf( | 1 Increase the record |n);printf( | |n);printf( | 2 Show all records |n);printf( | | then);printf( | 3 search the record |n);printf( | | result n);printf( | 4 Sort records |n);printf( | | managementn);printf( | 5 Insert record |n);printf( | |n);printf( | 6 Delete a record |n);printf( | |n); printf( | 7 Save the file |n);printf( | |n);printf( | 8 Quit | shen.n);printf( | | 05.7.2n);printf( *n); doprintf(n Enter you choice(18):); scanf(%s,s); c=atoi(s); while(c8); return(c); creat()int i;FILE *fp;clrscr();printf(How many students to record?(11000)n);scanf(%d,&n);printf(nNO.: name: score1: score2: score3:n);for(i=0;i scanf(%d%s%d%d%d,&stui.num,,&stui.score0,&stui.score1,&stui.score2); stui.avg=(float)(stui.score0+stui.score1+stui.score2)/3; if(fp=fopen(score,wb)=NULL) printf(Error,cannot open filen ); return; for(i=0;i if(fwrite(&stui,sizeof(struct student),1,fp)!=1) printf(file write errorn);fclose(fp);display()int i,p=1;FILE *fp;clrscr();if(fp=fopen(score,rb)=NULL) printf(nn Please,increase records first! n ); return; printf(nn NO.: name: score1: 2: 3: average:n);for(i=0;!feof(fp);i+) fread(&stui,sizeof(struct student),1,fp); if(stui.num!=0) printf(%5d %-10s %4d %4d %4d %8.2fn,stui.num,,stui.score0,stui.score1,stui.score2,stui.avg); if(i=20*p)printf(puts any key to next pag.);getch();p+; fclose(fp);find()char c10;int i;FILE *(fp);if(fp=fopen(score,rb)=NULL) printf(Error,cannot open filen ); return; for(i=0;!feof(fp);i+) fread(&stui,sizeof(struct student),1,fp); fclose(fp);printf(input the name for search:n);scanf(%s,c);clrscr();printf(nn NO.: name: score1: 2: 3: average:n);for(n=i,i=0;i if(strcmp(c,)=0)printf(%4d %-10s %4d %4d %4d %8.2fn,stui.num,,stui.score0,stui.score1,stui.score2,stui.avg);break; else if(i=n-1)printf(n Error!n No this studentn); add()int i;FILE *fp;char y;clrscr();printf(How many students to insertn);scanf(%d,&n);printf(nNO.: name: score1: score2: score3:n);for(i=0;i scanf(%d%s%d%d%d,&stui.num,,&stui.score0,&stui.score1,&stui.score2); stui.avg=(float)(stui.score0+stui.score1+stui.score2)/3; if(fp=fopen(score,ab)=NULL) printf(Error,cannot open filen ); return; for(i=0;i if(fwrite(&stui,sizeof(struct student),1,fp)!=1) printf(file write errorn);fclose(fp);printf(nnDo you want to sort? y/n? ); scanf(%s,&y); if(y=Y|y=y)sort();save()int i;FILE *fp;if(fp=fopen(score,wb)=NULL) printf(Error,cannot open filen ); return; for(i=0;i if(fwrite(&stui,sizeof(struct student),1,fp)!=1) printf(file write errorn);fclose(fp);load()FILE *fp;int i;if(fp=fopen(score,rb)=NULL)return;for(i=0;!feof(fp);i+) fread(&stui,sizeof(struct student),1,fp);fclose(fp);sort()int i,j,k,t;float p; FILE *fp;char temp10; if(fp=fopen(score,rb)=NULL) printf(Error,cannot open filen ); return; for(i=0;!feof(fp);i+) fread(&stui,sizeof(struct student),1,fp); fclose(fp); for(n=i,i=0;i k=i; for(j=k+1;j if(stuk.avg k=j; t=stuk.num; stuk.num=stui.num; stui.num=t; strcpy(temp,); strcpy(,); strcpy(,temp); t=stuk.score0;stui.score0=t; t=stuk.score1; stuk.score1=stui.score1; stui.score1=t; t=stuk.score2; stuk.score2=stui.score2; stui.score2=t; p=stuk.avg; stuk.avg=stui.avg; stui.avg=p; clrscr();printf(nn NO.: name: score1: 2: 3: average:n);for(i=0;i if(stui.num!=0) printf(%5d %-10s %4d %4d %4d %8.2fn,stui.num,,stui.score0,stui.score1,stui.score2,stui.avg); del()int i,x;char c10,y;FILE *fp; if(fp=fopen(score,rb)=NULL) printf(Error,cannot open filen ); return; clrscr(); printf(n NO.: name: score1: 2: 3: average:n); for(i=0;!feof(fp);i+) fread(&stui,sizeof(struct student),1,fp); if(stui.num!=0)printf(%5d %-10s %4d %4d %4d %8.2fn,stui.num,,stui.score0,stui.score1,stui.score2,stui.avg); fclose(fp); printf(input the name for deleten); scanf(%s,c); for(n=i,i=0;i if(strcmp(c,)=0)break; for(x=i;x stux.num=stux+1.num; strcpy(,stux+1.name); stux.score0=stux+1.score0; stux.score1=stux+1.score1; stux.score2=stux+1.score2; stux.avg=stux+1.avg; clrscr(); printf(n NO.: name: s