大一課程設(shè)計(jì)

課程設(shè)計(jì)目的和要求（一）.課程設(shè)計(jì)目的本課程設(shè)計(jì)是重要的實(shí)踐性環(huán)節(jié)之一，是在學(xué)生學(xué)習(xí)完《程序設(shè)計(jì)語(yǔ)言（C）》課程后進(jìn)行的一次全面的綜合練習(xí)。本課程設(shè)計(jì)的目的和任務(wù)：鞏固和加深學(xué)生對(duì)C語(yǔ)言課程的基本知識(shí)的理解和掌握掌握C語(yǔ)言編程和程序調(diào)試的基本技能利用C語(yǔ)言進(jìn)行基本的軟件設(shè)計(jì)掌握書(shū)寫(xiě)程序設(shè)計(jì)說(shuō)明文檔的能力提高運(yùn)用C語(yǔ)言解決實(shí)際問(wèn)題的能力（二）.課程設(shè)計(jì)要求分析課程設(shè)計(jì)題目的要求寫(xiě)出詳細(xì)設(shè)計(jì)說(shuō)明編寫(xiě)程序代碼，調(diào)試程序使其能正確運(yùn)行設(shè)計(jì)完成的軟件要便于操作和使用4.設(shè)計(jì)完成后提交課程設(shè)計(jì)報(bào)告課程設(shè)計(jì)任務(wù)內(nèi)容設(shè)計(jì)一個(gè)學(xué)生成績(jī)管理系統(tǒng)。系統(tǒng)功能：1） 具備對(duì)學(xué)生基礎(chǔ)數(shù)據(jù)的維護(hù)功能（添加、刪除、修改）2） 具備對(duì)課程基礎(chǔ)數(shù)據(jù)的維護(hù)功能（添加、刪除、修改）3） 具備對(duì)學(xué)生成績(jī)數(shù)據(jù)的維護(hù)功能（添加、刪除、修改）4） 具備對(duì)成績(jī)的查詢(xún)功能（按學(xué)號(hào)、姓名、或課程名查詢(xún)成績(jī)，排序等）5） 具備對(duì)成績(jī)的統(tǒng)計(jì)功能（最高分，最低分，平均分，及格率等）6） 采用菜單界面總體設(shè)計(jì)說(shuō)明工程設(shè)計(jì)說(shuō)明（工程中有哪些文件組成，各有什么作用）該工程文件中有student.h,studentmain.c,student.c,course.c,scgrade.cquery.c#c。student.h是頭文件，主要存放一些其他函數(shù)共用的東西，比如結(jié)構(gòu)體之類(lèi)的。Studentmain.c存放main函數(shù)主菜單程序。其他幾個(gè)是存放的實(shí)現(xiàn)各個(gè)功能的函數(shù)。另外，還有STUDENT.DAT，COURSE.DAT，GRADE.DAT三個(gè)文件，主要存放學(xué)生，課程，成績(jī)的信息的。還有一個(gè)TEMP.DAT文件，用于暫時(shí)存放數(shù)據(jù)。菜單結(jié)構(gòu)設(shè)計(jì)（列出各級(jí)菜單）C-C■U:\STUDEMT\pebug\STUDENT.eKe"請(qǐng)輸」.數(shù)字選擇,加改除霍刪M栗據(jù)裾糞主數(shù)數(shù)數(shù)系..筑三戶(hù)蘭出1230汎'D:\STUDEIVT\pebug\STUDENT.exe'|n|1230請(qǐng)輸」.數(shù)字選擇,C-C■U:\STUDEMT\pebug\STUDENT.eKe"1230加改除霍刪M栗據(jù)裾糞

主數(shù)數(shù)數(shù)系|n|I簪鸚成成成成查單詢(xún)?cè)冊(cè)冊(cè)儾嗣鞑椴椴椴檎T統(tǒng)七萬(wàn)名名名汎'D:\STUDEIVT\pebug\STUDENT.exe'1234501224請(qǐng)輸a^T選擇=B'c-c■U:\STUDEMT\pebug\STUDENT.eKe"皴A咸中績(jī)績(jī)績(jī)1-良成成成統(tǒng)藝m-算名名平主統(tǒng)經(jīng)班班爰統(tǒng)衍P名名名各系一糸課班課葬出按按.3數(shù)據(jù)結(jié)構(gòu)設(shè)計(jì)（三個(gè)數(shù)據(jù)文件用到的的結(jié)構(gòu)定義）學(xué)生結(jié)構(gòu)體：structstudent{longsno;charsname[20];charsclass[20];}；課程結(jié)構(gòu)體：structcourse{intcno;charcname[30];};成績(jī)結(jié)構(gòu)體：structscgrade{longsno;intcno;floatgrade;};詳細(xì)設(shè)計(jì)說(shuō)明1學(xué)生數(shù)據(jù)維護(hù)子系統(tǒng)設(shè)計(jì)說(shuō)明(每個(gè)功能模塊的設(shè)計(jì)思路，哪些功能是自己增強(qiáng)的，加注釋的源代碼)#include<stdio.h>#include"STUDENT.H"http://該部分為學(xué)生主菜單程序，分別調(diào)用添加，修改，刪除三個(gè)函數(shù)。voidstudentmenu(){voidaddstudent();voidmodistudent();voiddeletestudent();chara;while(1){puts("\n");puts("系統(tǒng)主菜單");puts("1：學(xué)生數(shù)據(jù)添加");puts("2：學(xué)生數(shù)據(jù)修改");puts("3：學(xué)生數(shù)據(jù)刪除");puts("0：退出系統(tǒng)");printf("請(qǐng)輸入數(shù)字選擇：”);a=getche();switch(a){case'1'：addstudent();break;case'2'：modistudent();break;case'3':deletestudent();break;case'0':system("cls");return;default:return;}}}//添加數(shù)據(jù)voidaddstudent(){FILE*fp;structstudents;structstudentsw;charch;intflag=0;//打開(kāi)文件。fp=fopen("d:\\STUDENT\\STUDENT.dat","ab+");if(!fp){printf("Createfileerror!\n");return;}do{do{/*輸入一條學(xué)生信息，另外，增加了檢驗(yàn)數(shù)據(jù)是否重復(fù)的功能*/printf("\nEnterastudentnumbernameclass:");fflush(stdin);scanf("%ld%s%s",&s.sno,s.sname,s.sclass);rewind(fp);while(!feof(fp)){fread(&sw,sizeof(sw),1,fp);if(sw.sno==s.sno){flag=1;printf("數(shù)據(jù)輸入重復(fù)，請(qǐng)重新輸入??！”);break;}}}while(flag);fwrite(&s,sizeof(s),1,fp);//提示是否繼續(xù)輸入。printf("Inputanotherstudent?[y/n]");ch=getche();}while(ch=='y');fclose(fp);}//修改數(shù)據(jù)voidmodistudent(){FILE*fp;charch;structstudents,modis;intfound=0;fp=fopen("D:\\STUDENT\\STUDENT.dat","rb+");if(!fp){printf("Createfileerror!\n");return;}/*顯示文件中的所有學(xué)生信息*/fread(&s,sizeof(s),1,fp);PRINT1;while(!feof(fp)){PRINT2;PRINT1;fread(&s,sizeof(s),1,fp);}/*提示輸入要修改的學(xué)生號(hào),存入modis.sno*/printf("pleaseenterthenoofthemodify");scanf("%ld",&modis.sno);/*找到要修改的學(xué)生并顯示*/rewind(fp);while(1){fread(&s,sizeof(s),1,fp);if(feof(fp))break;if(s.sno==modis.sno){found=1;break;}}if(!found){printf("未找到你要找的數(shù)據(jù)?。?)；return;}elsePRINT2；printf("\n你確實(shí)要修改該學(xué)生的其他信息嗎？(Y/N)");ch=getche()；if(ch=='Y'||ch=='y'){/*提示輸入要修改的學(xué)生姓名,存入modis.sname*/printf("\npleaseenterthenameofthemodify\n");scanf("%s",modis.sname);printf("\npleaseentertheclassofthemodify\n");scanf("%s",modis.sclass);fseek(fp,-(int)sizeof(s),SEEK_CUR); /*從當(dāng)前位置向前移動(dòng)一個(gè)s的長(zhǎng)度*//*將modis寫(xiě)到文件(覆蓋原數(shù)據(jù))*/fwrite(&modis,sizeof(s),1,fp);}fclose(fp);}//刪除數(shù)據(jù)。voiddeletestudent(){FILE*fp,*fp1;charch;intfound=0,num;structstudents;fp=fopen("D:\\student\\student.dat","rb");if(!fp){printf("Createfileerror!!");return;}/*顯示文件中的所有學(xué)生信息*/fread(&s,sizeof(s),1,fp);PRINT1;while(!feof(fp)){PRINT2;PRINT1;fread(&s,sizeof(s),1,fp);}printf("pleaseenterthenoofthedelete");scanf("%d",&num);//找到要修改的學(xué)生信息，顯示！rewind(fp);while(1){fread(&s,sizeof(s),1,fp);if(feof(fp))break;if(s.sno==num){found=1;break;}}if(!found){printf("未找到你要找的數(shù)據(jù)！！")；return;}elsePRINT2；printf("\n你確實(shí)要?jiǎng)h除該學(xué)生的信息嗎？(Y/N)");ch=getche()；〃將刪除后的信息復(fù)制到temp文件中。if(ch=='Y'||ch=='y'){fp1=fopen("D:\\student\\temp.dat","wb");rewind(fp);while(1){fread(&s,sizeof(s),1,fp);if(feof(fp))break;if(s.sno!=num){fwrite(&s,sizeof(s),1,fp1);}}}fclose(fp1);fclose(fp);將temp文件的信息再重新覆蓋掉原來(lái)的student文件。fp=fopen("D:\\student\\student.dat","wb");fp1=fopen("D:\\student\\temp.dat","rb");while(1){fread(&s,sizeof(s),1,fp1);if(feof(fp1))break;fwrite(&s,sizeof(s),1,fp);}fclose(fp1);fclose(fp);}2課程數(shù)據(jù)維護(hù)子系統(tǒng)設(shè)計(jì)說(shuō)明#include<stdio.h>#include"STUDENT.H"voidcoursemenu(){voidaddcourse();voidmodicourse();voiddeletecourse();chara;while(1){puts("\n");puts("系統(tǒng)主菜單");puts("1：課程數(shù)據(jù)添加");puts("2：課程數(shù)據(jù)修改");puts("3：課程數(shù)據(jù)刪除");puts("0：退出系統(tǒng)");printf("請(qǐng)輸入數(shù)字選擇：”);a=getche();switch(a){case'1'：addcourse();break;case'2'：modicourse();break;case'3'：deletecourse();break;case'0'：system("cls");return;default：return;}}}//添加數(shù)據(jù)。voidaddcourse(){FILE*fp;structcoursec,cw;charch;intflag=0;fp=fopen("d:\\STUDENT\\COURSE.dat","ab+");if(!fp){printf("Createfileerror!\n");return;}//輸入一條課程信息，提示是否重新輸入，另外增加檢驗(yàn)數(shù)據(jù)是否重復(fù)的功能do{do{printf("\nEnteracoursenumbername:");fflush(stdin);scanf("%d%s",&o,ame);rewind(fp);while(!feof(fp)){fread(&cw,sizeof(cw),1,fp);if(o==o){flag=1;printf("數(shù)據(jù)輸入重復(fù)，請(qǐng)重新輸入??！”)；break;}}}while(flag)；fwrite(&c,sizeof(c),1,fp)；printf("Inputanothercourse?[y/n]")；ch=getche()；}while(ch=='y')；fclose(fp)；}//修改數(shù)據(jù)voidmodicourse(){FILE*fp；charch；structcoursec,modis；intfound=0；fp=fopen("D:\\STUDENT\\COURSE.dat","rb+")；if(!fp){printf("Createfileerror!\n")；return；}/*顯示文件中的所有課程信息*/fread(&c,sizeof(c),1,fp)；PRINT1；while(!feof(fp)){PRINT3；PRINT1；fread(&c,sizeof(c),1,fp)；}/*提示輸入要修改的課程號(hào),存入modis.sno*/printf("pleaseenterthenoofthemodify");scanf("%d",&o);/*找到要修改的課程并顯示*/rewind(fp);while(1){fread(&c,sizeof(c),1,fp);if(feof(fp))break;if(o==o){found=1;break;}}if(!found){printf("未找到你要找的數(shù)據(jù)！！")；return;}elsePRINT3；printf("\n你確實(shí)要修改該課程的其他信息嗎？(Y/N)");ch=getche()；if(ch=='Y'||ch=='y'){/*提示輸入要修改的課程名,存入ame*/printf("\npleaseenterthenameofthemodify\n");scanf("%s",ame);}fseek(fp,-sizeof(c),SEEK_CUR); /*從當(dāng)前位置向前移動(dòng)一個(gè)s的長(zhǎng)度*//*將modis寫(xiě)到文件(覆蓋原數(shù)據(jù))*/fwrite(&modis,sizeof(c),1,fp);fclose(fp);}//刪除數(shù)據(jù)。voiddeletecourse(){FILE*fp,*fp1;charch;intfound=0,num;structcoursec;fp=fopen("D:\\student\\COURSE.dat","rb");if(!fp){printf("Createfileerror!!");return;}//顯示文件中的信息。fread(&c,sizeof(c),1,fp);PRINT1;while(!feof(fp)){PRINT3;PRINT1;fread(&c,sizeof(c),1,fp);}/*提示輸入要修改的課程號(hào),存入num*/printf("pleaseenterthenoofthedelete");scanf("%d",&num);/*找到要修改的課程并顯示*/rewind(fp);while(1){fread(&c,sizeof(c),1,fp);if(feof(fp))break;if(o==num){found=1;break;}}if(!found){printf("未找到你要找的數(shù)據(jù)?。?)；return;}elsePRINT3；printf("\n你確實(shí)要?jiǎng)h除該學(xué)生的信息嗎？(Y/N)");ch=getche()；〃將刪除后的文件復(fù)制到temp文件中。if(ch=='Y'||ch=='y'){fp1=fopen("D:\\student\\temp.dat","wb");rewind(fp);while(1){fread(&c,sizeof(c),1,fp);if(feof(fp))break;if(o!=num){fwrite(&c,sizeof(c),1,fp1);}fclose(fp1);fclose(fp);〃將temp文件中的信息覆蓋掉原來(lái)course的文件中。fp=fopen("D:\\student\\COURSE.dat","wb");fp1=fopen("D:\\student\\temp.dat","rb");while(l){fread(&c,sizeof(c),1,fp1);if(feof(fpl))break;fwrite(&c,sizeof(c),l,fp);}fclose(fpl);fclose(fp);}3成績(jī)數(shù)據(jù)維護(hù)子系統(tǒng)設(shè)計(jì)說(shuō)明#include<stdio.h>#include"STUDENT.H"voidgrademenu(){voidaddgrade();voidmodigrade();voiddeletegrade();chara;while(l){puts("\n");puts("系統(tǒng)主菜單");puts("l：成績(jī)數(shù)據(jù)添加");puts("2：成績(jī)數(shù)據(jù)修改");puts("3：成績(jī)數(shù)據(jù)刪除");puts("0：退出系統(tǒng)");printf("請(qǐng)輸入數(shù)字選擇：");a=getche();switch(a){case'l'：addgrade();break;case'2'：modigrade();break;case'3':deletegrade();break;case'0':system("cls");return;default:return;}}}//添加成績(jī)！voidaddgrade(){FILE*fp;structscgradesc;structscgradescw;charch;intflag=0;fp=fopen("d:\\STUDENT\\GRADE.dat","ab+");if(!fp){printf("Createfileerror!\n");return;}//輸入一條成績(jī)信息，提示是否重新輸入，另外增加檢驗(yàn)數(shù)據(jù)是否重復(fù)的功能do{do{printf("\nEnterastudentnumber,acoursenumber,grade:");fflush(stdin);scanf("%ld%d%f",&sc.sno,&o,&sc.grade);if(sc.grade<0||sc.grade>100){flag=1;printf("\n輸入成績(jī)格式不正確，請(qǐng)重新輸入");}rewind(fp);while(!feof(fp)){fread(&scw,sizeof(scw),1,fp);if(o==o&&scw.sno==sc.sno){flag=1;printf("\n數(shù)據(jù)輸入重復(fù)，請(qǐng)重新輸入?。?);break;}}while(flag);fwrite(&sc,sizeof(sc),1,fp);printf("Inputanotherstudent'sgrade?[y/n]");ch=getche();}while(ch=='y');fclose(fp);}//修改數(shù)據(jù)voidmodigrade(){FILE*fp;charch;structscgradesc,modis;intfound=0;fp=fopen("D:\\STUDENT\\GRADE.dat","rb+");if(!fp){printf("Createfileerror!\n");return;}/*顯示文件中的所有成績(jī)信息*/fread(&sc,sizeof(sc),1,fp);PRINT1;while(!feof(fp)){PRINT4;PRINT1;fread(&sc,sizeof(sc),1,fp);}/*提示輸入要修改的學(xué)生號(hào),存入modis.sno*/printf("pleaseenterthenoofthemodify");scanf("%ld",&modis.sno);/*找到要修改的學(xué)生成績(jī)并顯示*/rewind(fp);while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(sc.sno==modis.sno){found=1;break;}}if(!found){printf("未找到你要找的數(shù)據(jù)?。?)；return;}elsePRINT4;printf("\n你確實(shí)要修改該學(xué)生的其他信息嗎？(Y/N)");ch=getche();if(ch=='Y'||ch=='y'){/*提示輸入要修改的學(xué)生課程名和成績(jī)，存入o和modis.grade*/printf("\npleaseenterthecoursenumberofthemodify\n");scanf("%d"，&o);printf("\npleaseenterthegradeofthemodify\n");scanf("%f"，&modis.grade);}fseek(fp,-(int)sizeof(sc),SEEK_CUR); /*從當(dāng)前位置向前移動(dòng)一個(gè)sc的長(zhǎng)度*//*將modis寫(xiě)到文件(覆蓋原數(shù)據(jù))*/fwrite(&modis,sizeof(sc),1,fp);fclose(fp);}//刪除數(shù)據(jù)voiddeletegrade(){FILE*fp,*fp1;charch;intfound=0,num;structscgradesc;fp=fopen("D:\\student\\GRADE.dat","rb");if(!fp){printf("Createfileerror!!");return;}//顯示文件中的信息fread(&sc,sizeof(sc),1,fp);PRINT1;while(!feof(fp)){PRINT4;PRINT1;fread(&sc,sizeof(sc),1,fp);}/*提示輸入要?jiǎng)h除的學(xué)號(hào)，存入num*/printf("pleaseenterthenoofthedelete");scanf("%d",&num);/*找到要?jiǎng)h除的成績(jī)并顯示*/rewind(fp);while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(sc.sno==num){found=1;break;}}if(!found){printf("未找到你要找的數(shù)據(jù)！！")；return;}elsePRINT4；printf("\n你確實(shí)要?jiǎng)h除該學(xué)生的信息嗎？(Y/N)");ch=getche()；〃將刪除后的文件復(fù)制到temp文件中。if(ch=='Y'||ch=='y'){fp1=fopen("D:\\student\\temp.dat","wb");rewind(fp);while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(sc.sno!=num){fwrite(&sc,sizeof(sc),1,fp1);}}}fclose(fp1);fclose(fp);〃將temp文件中的信息覆蓋掉原來(lái)course的文件中。fp=fopen("D:\\student\\GRADE.dat","wb");fp1=fopen("D:\\student\\temp.dat","rb");while(l){fread(&sc,sizeof(sc),1,fp1);if(feof(fpl))break;fwrite(&sc,sizeof(sc),l,fp);}fclose(fpl);fclose(fp);4查詢(xún)數(shù)據(jù)維護(hù)子系統(tǒng)設(shè)計(jì)說(shuō)明#include<stdio.h>#include<string.h>#include"STUDENT.H"voidquery(){voidsnoquery();voidsnamequery();voidcnamequery();voidcnamequeryson();voidclassandcnamequery();chara;while(1){puts("\n");puts("系統(tǒng)主菜單");puts("1：按學(xué)號(hào)查詢(xún)成績(jī)");puts("2：按姓名查詢(xún)成績(jī)");puts("3：按課名查詢(xún)成績(jī)");puts("4：按課名查詢(xún)成績(jī)（子函數(shù)）"）;puts("5：按班名課名查詢(xún)成績(jī)"）;puts("0：退出系統(tǒng)");printf（"請(qǐng)輸入數(shù)字選擇：”）;a=getche();switch(a){case'1'：snoquery();break;case'2'：snamequery();break;case'3'：cnamequery();break;case'4'：cnamequeryson();break;case'5'：classandcnamequery();break;case'0':system("cls");return;default:return;}}}//按學(xué)號(hào)查詢(xún)voidsnoquery(){FILE*fp;structscgradesc;charch;longno;intfound=0;fp=fopen("d:\\STUDENT\\GRADE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}//提示要查詢(xún)成績(jī)的學(xué)號(hào)。printf("\nEnterastudentnumberofthequery:");scanf("%ld",&no);//顯示并輸出。while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(sc.sno==no){found=1;PRINT1;PRINT4;}}PRINT1;if(!found){printf("未找到你要找的數(shù)據(jù)??！")；return;}fclose(fp)；//按姓名查詢(xún)voidsnamequery(){FILE*fp;structstudents;structscgradesc;charch,name[20];longno;intfound=0;fp=fopen("d:\\STUDENT\\STUDENT.dat","rb");if(!fp){printf("Createfileerror!\n");return;}//提示輸入要查詢(xún)成績(jī)的姓名。printf("\nEnterastudentnameofthequery:");scanf("%s",name);//找到該生的的學(xué)號(hào)。while(1){fread(&s,sizeof(s),1,fp);if(feof(fp))break;if(strcmp(s.sname,name)==0){found=1;no=s.sno;//PRINT1;//PRINT2;}}//PRINT1;if(!found){printf("未找到你要找的數(shù)據(jù)?。?)；return;}fclose(fp)；fp=fopen("d:\\STUDENT\\GRADE.dat","rb")；found=0；if(!fp){printf("Createfileerror!\n")；return；}//找到該生成績(jī)，并顯示。while(1){fread(&sc,sizeof(sc),1,fp)；if(feof(fp))break；if(sc.sno==no){found=1；PRINT1；PRINT4；}PRINT1;if(!found){printf("未找到你要找的數(shù)據(jù)?。?);return;}fclose(fp);}//按課名查詢(xún)voidcnamequery(){FILE*fp;structcoursec;structscgradesc,temp;structscgradegrades[80];charname[20];intno,i,j,n=0;intfound=0;fp=fopen("d:\\STUDENT\\COURSE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}//提示輸入要查詢(xún)的課程名printf("\nEnteracoursenameofthequery:");scanf("%s",name);//找到該課程的課稱(chēng)號(hào)。while(1){fread(&c,sizeof(c),1,fp);if(feof(fp))break;if(strcmp(ame,name)==0){found=1;no=o;//PRINT1;//PRINT3;}}//PRINT1;if(!found){printf("未找到你要找的數(shù)據(jù)!!");return;fp=fopen("d:\\STUDENT\\GRADE.dat","rb");found=0;if(!fp){printf("Createfileerror!\n");return;}//在成績(jī)信息中找到該課程號(hào)的成績(jī)while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(o==no){found=1;grades[n]=sc;n=n+1;//PRINT1;//PRINT4;}}//排序for(i=0;i<n;i++){for(j=i+1;j<=n;j++){if(grades[i].grade<grades[j].grade){temp=grades[i];grades[i]=grades[j];grades[j]=temp;}}}//顯示for(i=0;i<n;i++){PRINT1;printf("%-5ld%5d%15f",grades[i].sno,grades[i].cno,grades[i].grade);}PRINT1;if(!found){printf("未找到你要找的數(shù)據(jù)??！")；return;}fclose(fp)；}//按課程名，用子函數(shù)查詢(xún)。voidcnamequeryson(){intgetcno(charname[]);//獲取課程號(hào)。intgetgrade(intcno,structscgradegrades]]);/獲取成績(jī)voidsort(structscgradegrades[],intn);//排序voiddisplay(structscgradegrades[],intn);//顯示structscgradegrades[80];charname[20];intcno,n;printf("\nEnteracoursenameofthequery:");scanf("%s",name);cno=getcno(name);if(cno==-1) {puts("Nosuchcourse!");return;}n=getgrade(cno,grades);sort(grades,n);display(grades,n);}intgetcno(charname[]){FILE*fp;structcoursec;intfound=0,no;fp=fopen("d:\\STUDENT\\COURSE.dat","rb");if(!fp){printf("Createfileerror!\n");return-1;}//獲取課程號(hào)。while(1){fread(&c,sizeof(c),1,fp);if(feof(fp))break;if(strcmp(ame,name)==0){found=1;no=o;//PRINT1;//PRINT3;}}//PRINT1;returnno;if(!found){printf("未找到你要找的數(shù)據(jù)??！")；return-1;intgetgrade(intcno,structscgradegrades[]){FILE*fp;structscgradesc;intn=0,found=0;fp=fopen("d:\\STUDENT\\GRADE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}//通過(guò)課程號(hào)，找到成績(jī)。while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(o==cno){found=1;grades[n]=sc;n=n+1;//PRINT1;//PRINT4;}}returnn;if(!found){printf("未找到你要找的數(shù)據(jù)??！")；return;}}//排序voidsort(structscgradegrades[],intn){inti,j；structscgradetemp；for(i=0；i<n；i++){for(j=i+1；j<=n；j++){if(grades[i].grade<grades[j].grade){temp=grades[i]；grades[i]=grades[j]；grades[j]=temp；}}}}//顯示voiddisplay(structscgradegrades[],intn){inti；for(i=0;i<n;i++){PRINT1;printf("%-5ld%5d%15f",grades[i].sno,grades[i].cno,grades[i].grade);}PRINT1;}//按班名和課名查詢(xún)voidclassandcnamequery(){intandgetsno(charname[],longsnos[]);intandgetcno(charname[]);intandgetgrades(intcno,intn,longsnos[],structscgradegrades[]);voidsort(structscgradegrades[],intn);voiddisplay(structscgradegrades[],intn);structscgradegrades[80];charname1[20],name2[20];longsnos[80];intcno,n,m;//提示輸入班名和課名。printf("\nEnteraclassandacoursenameofthequery:");scanf("%s%s",name1,name2);n=andgetsno(name1,snos);//snos是調(diào)用函數(shù)后的符合條件學(xué)生號(hào)cno=andgetcno(name2);//獲取課程號(hào)。if(cno==-1) {puts("Nosuchcourse!");return;}m=andgetgrades(cno,n,snos,grades);//grades是調(diào)用函數(shù)后的符合條件的成績(jī)。m是個(gè)數(shù)。sort(grades,m);〃扌非序display(grades,m);顯示}//獲取學(xué)號(hào)intandgetsno(charname[],longsnos[]){FILE*fp;intfound=0,n=0;structstudents;fp=fopen("d:\\STUDENT\\STUDENT.dat","rb");if(!fp){printf("Createfileerror!\n");return;}rewind(fp);while(1){fread(&s,sizeof(s),1,fp);if(feof(fp))break;if(strcmp(s.sclass,name)==0){found=1;snos[n]=s.sno;n=n+1;//PRINT1;//PRINT2;}}//PRINT1;returnn;if(!found){printf("未找到你要找的數(shù)據(jù)??！")；return;}fclose(fp)；}//獲取課程號(hào)intandgetcno(charname[]){FILE*fp；structcoursec；intfound=0,no；fp=fopen("d:\\STUDENT\\COURSE.dat","rb")；if(!fp){printf("Createfileerror!\n")；return-1；}while(1){fread(&c,sizeof(c),1,fp)；if(feof(fp))break；if(strcmp(ame,name)==0){found=1；no=o；//PRINT1；//PRINT3；}}//PRINT1；returnno；if(!found){printf("未找到你要找的數(shù)據(jù)!!");return-1；}fclose(fp);

}//獲取成績(jī)intandgetgrades(intcno,intn,longsnos[],structscgradegrades[]){FILE*fp;intfound=0,i,m=0;structscgradesc;fp=fopen("d:\\STUDENT\\GRADE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;if(o==cno){for(i=0;i<n;i++){if(sc.sno==snos[i]){grades[m]=sc;m=m+1;}}}}returnm;fclose(fp);}5統(tǒng)計(jì)數(shù)據(jù)維護(hù)子系統(tǒng)設(shè)計(jì)說(shuō)明#include<stdio.h>#include<string.h>#include"STUDENT.H"voidtongji(){voidcnametongji();voidclasstongji();voidclassandcnametongji();voidclassandcnametongjifour();voidclassesaverage();chara;while(1){系統(tǒng)主菜單");系統(tǒng)主菜單");puts("puts("1：按課名統(tǒng)計(jì)成績(jī)"）；puts("2：按班名統(tǒng)計(jì)成績(jī)"）；puts("3：按課名班名統(tǒng)計(jì)成績(jī)"）；puts("4：按課名班名優(yōu)良中差人數(shù)"）；puts("5：統(tǒng)計(jì)各班平均成績(jī)"）；puts("0：退出系統(tǒng)"）；printf("請(qǐng)輸入數(shù)字選擇：”)；a=getche();switch(a){case'1'：cnametongji()；break；case'2'：classtongji()；break；case'3'：classandcnametongji()；break；case'4'：classandcnametongjifour()；break；case'5'：classesaverage()；break；case'0'：system("cls")；return；default：return；}}}//按課名統(tǒng)計(jì)voidcnametongji(){FILE*fp；structcoursec；structscgradesc；structscgradegrades[80]；charname[20]；intno,i,p=0,n=0;intfound=0;floatmax=0,min=0,sum=0,average,peng;fp=fopen("d:\\STUDENT\\COURSE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}//提示輸入要統(tǒng)計(jì)的課程名。printf("\nEnteracoursenameofthetongji:");scanf("%s",name);//找到該課程的課程號(hào)。while(1){fread(&c,sizeof(c),1,fp);if(feof(fp))break;if(strcmp(ame,name)==0){found=1;no=o;//PRINT1;//PRINT3;}}//PRINT1;if(!found){printf("未找到你要找的數(shù)據(jù)！！")；return;}fclose(fp)；fp=fopen("d:\\STUDENT\\GRADE.dat","rb")；found=0；if(!fp){printf("Createfileerror!\n")；return；}//找到該課程的相關(guān)成績(jī)。while(1){fread(&sc,sizeof(sc),1,fp)；if(feof(fp))break；if(o==no){found=1；grades[n]=sc；n=n+1；//PRINT1；//PRINT4；}}//求最大值，最小值，平均值，及格率。max=grades[1].grade;min=grades[1].grade;for(i=0;i<n;i++){if(max<grades[i].grade){max=grades[i].grade;}if(min>grades[i].grade){min=grades[i].grade;}if(grades[i].grade>=60)p=p+1;sum=sum+grades[i].grade;}average=sum/n;peng=p/n;PRINT5;PRINT6;if(!found){printf("未找到你要找的數(shù)據(jù)??！");return;}fclose(fp);}//按班名統(tǒng)計(jì)voidclasstongji(){intandgetsno(charname[],longsnos[]);FILE*fp;structscgradegrades[80],sc;charname[20];intfound=0,i,n=0,m=0,p=0;longsnos[80];floatmax=0,min=0,sum=0,average,peng;//提示要統(tǒng)計(jì)的班名。printf("\nEnteraclassnameofthetongji:");scanf("%s",name);fp=fopen("d:\\STUDENT\\GRADE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}n=andgetsno(name,snos);〃通過(guò)調(diào)用函數(shù)，獲取學(xué)生號(hào)//取得這些學(xué)生的成績(jī)。while(1){fread(&sc,sizeof(sc),1,fp);if(feof(fp))break;for(i=0;i<n;i++){if(sc.sno==snos[i]){grades[m]=sc;m=m+1;}}}//求最大值，最小值，平均值，及格率。max=grades[1].grade;min=grades[1].grade;for(i=0;i<m;i++){if(max<grades[i].grade){max=grades[i].grade;}if(min>grades[i].grade){min=grades[i].grade;}if(grades[i].grade>=60)p=p+1;sum=sum+grades[i].grade;}average=sum/m;peng=p/m;PRINT5;PRINT6;}//按班名，課名統(tǒng)計(jì)voidclassandcnametongji(){intandgetsno(charname[],longsnos[]);intandgetcno(charname[]);intandgetgrades(intcno,intn,longsnos[],structscgradegrades[]);structscgradegrades[80];charname1[20],name2[20];longsnos[80];intcno,n,m,i,p=0;floatmax=0,min=0,sum=0,average,peng;//提示要輸入的班名和課名printf("\nEnteraclassandacoursenameofthetongji:");scanf("%s%s",name1,name2);n=andgetsno(namel,snos);〃調(diào)用函數(shù)獲得學(xué)生號(hào)cno=andgetcno(name2);〃調(diào)用函數(shù)獲得課號(hào)。if(cno==-l){puts("Nosuchcourse!");return;}m=andgetgrades(cno,n,snos,grades);〃求得成績(jī)和個(gè)數(shù)//求最大值，最小值，平均值，及格率。max=grades[l].grade;min=grades[l].grade;for(i=0;i<m;i++){if(max<grades[i].grade){max=grades[i].grade;}if(min>grades[i].grade){min=grades[i].grade;}if(grades[i].grade>=60)p=p+l;sum=sum+grades[i].grade;}average=sum/m;peng=p/m;PRINT5;PRINT6;}//按課名，班名統(tǒng)計(jì)優(yōu)良中差。voidclassandcnametongjifour(){intandgetsno(charname[],longsnos[]);intandgetcno(charname[]);intandgetgrades(intcno,intn,longsnos[],structscgradegrades[]);structscgradegrades[80];charnamel[20],name2[20];longsnos[80];intcno,n,m,i,p=0,q=0,r=0,s=0,t=0;floatmax=0,min=0,sum=0,average,peng;

printf("\nEnteraclassandacoursenameofthetongji:");scanf("%s%s",name1,name2);n=andgetsno(name1,snos);//調(diào)用函數(shù)獲得學(xué)生號(hào)cno=andgetcno(name2);//調(diào)用函數(shù)獲得課號(hào)if(cno==-1){puts("Nosuchcourse!");return;}m=andgetgrades(cno,n,snos,grades);//獲取成績(jī)，及個(gè)數(shù)。//比較for(i=0;i<m;i++){if(grades[i].grade>=90)p+=1;elseif(grades[i].grade>=80)q+=1;elseif(grades[i].grade>=70)r+=1;elseif(grades[i].grade>=60)s+=1;elset+=1;不及格");不及格");%d",p,q,rprintf("\n優(yōu) 良 中 及printf("\n%d %d %d %d,s,t);}//求各班的平均分voidclassesaverage(){FILE*fp;inti,j,n=1,flag=1,m=0,w=0;structstudents;structscgradesc,grades[80];charclasses[80][20];longsnos[80][80];floatsum=0,average[80];fp=fopen("d:\\STUDENT\\STUDENT.dat","rb");if(!fp){printf("Createfileerror!\n");return;}fread(&s,sizeof(s),1,fp);strcpy(classes[0],s.sclass);while(1){fread(&s,sizeof(s),1,fp);if(feof(fp))break;for(i=0;i<n;i++){flag=strcmp(classes[i],s.sclass);if(flag==0)break;}if(flag!=0){strcpy(classes[n],s.sclass);n=n+l;〃獲取有多少班級(jí)}}fclose(fp);fp=fopen("d:\\STUDENT\\GRADE.dat","rb");if(!fp){printf("Createfileerror!\n");return;}for(i=0;i<n;i++){sum=0;w=0;m=andgetsno(classes[i],snos[i]);//獲取學(xué)生號(hào)，人數(shù)rewind(fp);while(l){fread(&sc,sizeof(sc),l,fp);if(feof(fp))break;for(j=0;j<m;j++){if(sc.sno==snos[i][j]){grades[w]=sc;w=w+1;〃找到class[i]的所有成績(jī)}}}for(j=0;j<w;j++){sum=sum+grades[j].grade;}average[i]=sum/w;〃求均，打印。printf("\n%s班平均分: %f",classes[i],average[i]);}fclose(fp);}四．軟件使用說(shuō)明

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