“學(xué)生學(xué)習(xí)成績管理系統(tǒng)”用于對(duì)學(xué)生學(xué)習(xí)成績數(shù)據(jù)文件的新文件創(chuàng)建和老文件管理，并可以進(jìn)行密碼設(shè)置。具體要求實(shí)現(xiàn)的功能如下：1、輸入添加記錄：將每一個(gè)學(xué)生的學(xué)號(hào)、姓名和各科學(xué)習(xí)成績作為一個(gè)記錄進(jìn)行輸入或添加。要求經(jīng)過密碼驗(yàn)證后能建立一個(gè)新的數(shù)據(jù)文件或給已建立好的數(shù)據(jù)文件增加記錄。2、顯示、查詢記錄：能按學(xué)生姓名（或?qū)W號(hào)）顯示、查詢一個(gè)或多個(gè)學(xué)生的各門（或某門）功課的成績和平均成績。3、修改記錄：可以對(duì)數(shù)據(jù)文件中的任意記錄的數(shù)據(jù)進(jìn)行修改，在修改前后對(duì)該記錄的內(nèi)容進(jìn)行顯示，并設(shè)確認(rèn)提示。（要求設(shè)置密碼，驗(yàn)證通過后方可進(jìn)入修改環(huán)節(jié)）4、刪除記錄：可以刪除數(shù)據(jù)文件中的任一記錄，包括邏輯刪除（具有恢復(fù)功能）和物理刪除（不可恢復(fù)）。（說明：該功能也應(yīng)設(shè)置為經(jīng)過驗(yàn)證密碼后才可實(shí)施刪除）5、成績排序：采用不同的排序方法對(duì)單科成績和總（或平均）成績進(jìn)行排序，但不能改變?cè)涗浀捻樞颉?、統(tǒng)計(jì)功能：（A）計(jì)算各門課程全班總成績及平均成績；（B）統(tǒng)計(jì)各門課程得分為100、9099、8089、7079、6069和不及格學(xué)生的人數(shù)，以及與全班總?cè)藬?shù)的百分比。7、其他：該軟件應(yīng)具有系統(tǒng)名稱、設(shè)計(jì)單位或個(gè)人等基本信息。學(xué)生成績管理系統(tǒng)源程序清單：#include#include#include#include#defineNULL0#defineLENsizeof(student)#defineN5typedefstructstuintflag；longnum；charname10；intscoreN；structstu*next；student；voidedit()；/*編輯菜單*/voidsearch(student*head)；/*查找函數(shù)*/student*search_number(student*head,longnumber)；/*按學(xué)號(hào)查找*/voidsearch_name(student*head)；/*按姓名查找*/student*search_score(student*head,intmin,intmax,inti)；/*按成績查找*/voidenter_record(student*p)；/*輸入成績*/student*creat(void)；/*建立鏈表*/student*insert(student*head)；/*插入結(jié)點(diǎn)*/voidcount(int*p)；/*計(jì)算總成績及平均成績*/voidprint(student*p)；/*輸出結(jié)點(diǎn)*/voidprint_title()；/*輸出標(biāo)題*/student*delete(student*head)；/*刪除結(jié)點(diǎn)*/voidrecover(student*head)；/*恢復(fù)刪除*/voidrevise(student*head)；/*修改記錄*/voidtongji(student*head)；/*統(tǒng)計(jì)*/voidpaixu(student*head,intm)；/*排序*/intcipher_check()；/*密碼檢測*/voidset_up_cipher()；/*設(shè)立密碼*/student*load()；/*載入*/voidsave(student*head)；/*保存*/voidabout()；/*關(guān)于*/intn；charcipher11=；/*字符串，保存密碼*/main()charc；student*head=NULL；system(cls)；about()；for(；)system(cls)；printf(*n)；printf(ttWelcometon)；printf(nttThestudentscoremanagesystemn)；printf(*MENU*n)；printf(ttt1.Creattherecordn)；printf(ttt2.Loadthefilen)；printf(ttt3.Edittherecordn)；printf(ttt4.Aboutdesignn)；printf(ttt5.Quitn)；printf(*n)；printf(ntttEnteryourchoice(15):)；for(；)c=getchar()；if(c=n)continue；elseif(c5)printf(tttEnteryourchoice(15):)；elsebreak；getchar()；switch(c)case1:head=creat()；if(head=NULL)printf(Emptyrecord!nnEnteranykeytocontinue.n)；getch()；break；set_up_cipher()；printf(Enteranykeytoeditmenu.)；getch()；edit(head)；break；case2:head=load()；if(head=NULL)printf(nEnteranykeytocontinue.)；getch()；break；printf(Enteranykeytoeditmenu.)；getch()；edit(head)；break；case3:edit(head)；break；case4:about()；break；case5:exit(0)；voidedit(student*head)/*編輯菜單*/charc,m；inti,f=0；for(；)system(cls)；printf(*EDIT*MENU*n)；printf(ttt1.Savetherecord.n)；printf(ttt2.Insertarecord.n)；printf(ttt3.Deletearecord.n)；printf(ttt4.Recovertherecord.n)；printf(ttt5.Revisetherecord.n)；printf(ttt6.Searchrecords.n)；printf(ttt7.Sorttherecords.n)；printf(ttt8.Tongjitherecords.n)；printf(ttt9.Changethepassword.n)；printf(ttt0.Returntomainmenu.n)；printf(*n)；printf(tttEnteryourchoice(09):)；for(；)c=getchar()；if(c=n)continue；elseif(c9)printf(tttEnteryourchoice(09):)；elsebreak；switch(c)case1:save(head)；f=0；break；case2:printf(Pleaseentertherightpassword:n)；if(cipher_check()=0)printf(Wrongpassword!n)；break；head=insert(head)；f=1；break；case3:printf(Pleaseentertherightpassword:n)；if(cipher_check()=0)printf(Wrongpassword!n)；break；head=delete(head)；f=1；break；case4:printf(Pleaseentertherightpassword:n)；if(cipher_check()=0)printf(Wrongpassword!n)；break；recover(head)；f=1；break；case5:printf(Pleaseentertherightpassword:n)；if(cipher_check()=0)printf(Wrongpassword!n)；break；revise(head)；f=1；break；case6:search(head)；break；case7:printf(Sortonwhichsubject?n)；printf(score1(1)/score2(2)/score3(3)/sum(4)n)；for(；)scanf(%c,&m)；if(m=n)；elseif(m=1&mnum)；head=NULL；while(p1-num!=0)n+；enter_record(p1)；if(n=1)head=p1；elsep2-next=p1；p2=p1；p1=(student*)malloc(LEN)；printf(Pleaseenternextnumber(0toend):n)；scanf(%ld,&p1-num)；if(n!=0)p2-next=NULL；free(p1)；returnhead；student*insert(student*head)/*插入結(jié)點(diǎn)*/student*p1,*p2,*new_node；for(；)new_node=(student*)malloc(LEN)；if(new_node=NULL)printf(Databaseisfull,cantaddmorerecord.n)；returnNULL；printf(nPleaseenterthenumberyouwanttoinsertn(enter0toend):)；scanf(%ld,&new_node-num)；if(new_node-num=0)break；for(p1=head,p2=NULL；p1!=NULL&(new_node-num)(p1-num)；p2=p1,p1=p1-next)；if(p1!=NULL&(p1-num)=(new_node-num)&p1-flag=1)charc；printf(Thisnumberalreadyexists:n)；print_title()；print(p1)；printf(Coverornot?(y/n)?)；for(；)c=getchar()；if(c=n|c=N)free(new_node)；break；elseif(c=y|c=Y)free(new_node)；enter_record(p1)；break；elseif(c!=n)printf(Error!enteragain:)；elsecontinue；elseif(p1!=NULL&(p1-num)=(new_node-num)n+；free(new_node)；enter_record(p1)；elsen+；enter_record(new_node)；new_node-next=p1；if(p2=NULL)head=new_node；elsep2-next=new_node；returnhead；student*delete(student*head)/*刪除結(jié)點(diǎn)*/longnumber；charc；student*p1,*p2；for(；)printf(Pleaseenterthenumberyouwanttodelete(enter0toend):n)；scanf(%ld,&number)；if(!number)break；for(p1=head,p2=NULL；p1!=NULL&p1-num!=number；p2=p1,p1=p1-next)；if(p1=NULL|p1-flag=0)printf(thisnumberdoesntexist.n)；elseprint_title()；print(p1)；printf(deletethisrecord?n)；printf(sure(s)/cancle(c)/deletethoroughly(t)n)；for(；)c=getchar()；if(c=c|c=C)break；elseif(c=s|c=S|c=t|c=T)n-；if(c=s|c=S)p1-flag=0；elseif(p2=NULL)head=p1-next；elsep2-next=p1-next；free(p1)；break；elseif(c!=n)printf(error!enteragain:)；returnhead；voidrecover(student*head)/*恢復(fù)刪除*/student*p；longnumber；printf(recoverwhichnumber?n)；scanf(%ld,&number)；if(number=0)return；p=search_number(head,number)；if(p=NULL)printf(Cantrecoverthisnumber!n)；elseif(p-flag=1)printf(Thisnumberhasnotbeendeleted.n)；elsen+；p-flag=1；printf(Recoversuccess!n)；voidrevise(student*head)/*修改記錄*/charc；longnumber；student*p1；for(；)printf(Whichnumberdoyouwanttorevise?n(enter0toend):)；scanf(%ld,&number)；if(number=0)return；p1=search_number(head,number)；if(p1=NULL|p1-flag=0)printf(thisnumberdoesntexist.n)；continue；print_title()；print(p1)；printf(Doyouwanttorevisetherecord?(y/n)n)；for(；)c=getchar()；if(c=n)continue；elseif(c=n|c=N)break；elseif(c=y|c=Y)printf(pleaseenternewrecord:n)；enter_record