c的管理系统参照.docx
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c的管理系统参照
怎样用C语言编这样一个程序：
学生成绩管理系统
功能要求：
1.能按学期，按班级完成对学生成绩的录入，修改
2.能按班级统计学生的成绩，求学生的总分及平均分，并能根据学生的平均成绩进行排序
3.能查询学生成绩，不及格科目及学生名单
4.能按班级输出学生的成绩单
#include
----基本功能实现了，修改一下就可以了，好运！
#include
#include
#include
#defineInputRcd1
#defineUpdateRcd2
#defineSelectRcd3
#defineExit4
#defineNAMELEN16/*姓名长度限制为16个字符*/
#defineCLASSLEN6/*班级编号限制为6个字符*/
structrecord{
charclassID[CLASSLEN];
intterm;
charname[NAMELEN];
intchinese,math,english;
};
/*程序信息*/
voidshowProgInform（）
{
printf（"-------------------------------------------------\n"）;
printf（"|***STUDENTS'SCOREPLATFORM***|\n"）;;
printf（"-------------------------------------------------\n\n"）;
}
/*指令菜单*/
voidshowMenu（）{
system（"cls"）;
showProgInform（）;
printf（"PleaseselectanoperationfothefollowingMENU:
\n"）;
printf（"1.Inputarecord\n"）;
printf（"2.Updatearecord\n"）;
printf（"3.Selectrecord（s）\n"）;
printf（"4.Exit.\n"）;
}
voidinputRecord（）{
structrecordinscr;
FILE*fp;
/*用户输入相应信息*/
system（"cls"）;
showProgInform（）;
printf（"Mention:
Youaretoaddnewrecord\n\n"）;
printf（"Pleaseinputbythefollowinginstructions:
\n"）;
printf（"ClassID:
"）;
scanf（"%s",inscr.classID）;
printf（"TermNumber:
"）;
scanf（"%d",&（inscr.term））;
printf（"StudentName:
"）;
scanf（"%s",inscr.name）;
printf（"Chinesescore:
"）;
scanf（"%d",&（inscr.chinese））;
printf（"Mathscore:
"）;
scanf（"%d",&（inscr.math））;
printf（"EnglishScore:
"）;
scanf（"%d",&（inscr.english））;
getchar（）;
/*将信息写进文件*/
if（（fp=（fopen（"stu_score.rcd","ab+"）））==NULL）{
printf（"Inputrecordfailed!
\n"）;
return;
}
/*写一条记录*/
fwrite（&inscr,sizeof（structrecord）,1,fp）;
fclose（fp）;
/*写进记事本文件*/
if（（fp=fopen（"stu_score.txt","ab+"））==NULL）{
return;
}
fprintf（fp,"%s-%d%s:
%d%d%d\r\n",inscr.classID,inscr.term,inscr.name,inscr.chinese,inscr.math,inscr.english）;;
fclose（fp）;
}
voidshowSingleRecord（structrecordrc）{
printf（"%s-%d%s:
（CHI）%d（MAT）%d（ENG）%d\n",rc.classID,rc.term,rc.name,rc.chinese,rc.math,rc.english）;
}
voidupdateRecord（）
{
longfsize,arraySize,i;
structrecord*allRecords,newRcd;/*数组的作用*/
inthasFound=0;
FILE*fp;
FILE*txt;
system（"cls"）;
showProgInform（）;
/*打开记录文件*/
if（（fp=fopen（"stu_score.rcd","rb"））==NULL）{
printf（"!
Norecords,cannotoperate\n"）;
return;
}
/*输入数据*/
printf（"Mention:
Youaretoupdaterecord\n\n"）;
printf（"Pleasetherecordyouwanttoupdatebythefollowmention:
\n"）;
printf（"ClassId:
"）;
scanf（"%s",newRcd.classID）;
printf（"Termnumber:
"）;
scanf（"%d",&newRcd.term）;
printf（"Studentname:
"）;
scanf（"%s",newRcd.name）;
fseek（fp,0,SEEK_END）;
fsize=ftell（fp）;
arraySize=fsize/（sizeof（structrecord））;
allRecords=（structrecord*）calloc（arraySize,sizeof（structrecord））;
rewind（fp）;
/*将所有数据读入数组块中*/
fread（allRecords,sizeof（structrecord）,arraySize,fp）;
/*查找*/
for（i=0;iif（strcmp（newRcd.classID,allRecords[i].classID）==0&&newRcd.term==allRecords[i].term&&strcmp（newRcd.name,allRecords[i].name）==0）{
printf（"Findthematchingrecord:
"）;
showSingleRecord（allRecords[i]）;
printf（"InputnewScore:
\n"）;
printf（"NewChineseScore:
"）;
scanf（"%d",&（allRecords[i].chinese））;
printf（"NewMathScore:
"）;
scanf（"%d",&（allRecords[i].math））;
printf（"NewEnglishScore:
"）;
scanf（"%d",&（allRecords[i].english））;
printf（"Afterupdate,therecordsis:
\n\t"）;
showSingleRecord（allRecords[i]）;
printf（"\n"）;
hasFound=1;
break;
}
}
fclose（fp）;
if（!
hasFound）{
printf（"Nomatchingrecordhasfound!
\n"）;
/*释放动态空间*/
free（allRecords）;
return;
}
/*将修改后的记录回写*/
if（（fp=fopen（"stu_score.rcd","w"））==NULL）{
printf（"Writefilestu_score.rcdfailed\n"）;
return;
}
if（（txt=fopen（"stu_score.txt","w"））==NULL）{
printf（"Writefilestu_score.txtfailed\n"）;
return;
}
fwrite（allRecords,sizeof（structrecord）,arraySize,fp）;
for（i=0;ifprintf（txt,"%s-%d%s:
%d%d%d\r\n",allRecords[i].classID,allRecords[i].term,allRecords[i].name,allRecords[i].chinese,allRecords[i].math,allRecords[i].english）;
}
/*释入动态分配的空间*/
free（allRecords）;
/*关闭文件*/
fclose（fp）;
fclose（txt）;
}
voidshowSelectMenu（charclassID[],intterm）{
system（"cls"）;
showProgInform（）;
printf（"Mention:
AllthefollowingopertionbasedonclassID:
%s,Term:
%d\n\n",classID,term）;
printf（"Mention:
Youaretoselecttherecords\n\n"）;
printf（"\tPleasechooseanoperation:
\n"）;
printf（"\t1.SelectallrecordsoftheclassID.\n"）;
printf（"\t2.Sortbytheaveragescore.\n"）;
printf（"\t3.Selectnopassedrecord.\n"）;
printf（"\tOther.Returnthehighlevelmenu.\n\n"）;
}
/*显示一班级一学期的所有统计数据*/
voidshowStatistic（structrecord*r,longsize,charclassID[],intterm）{
inttotal;
floatave;
longi;
system（"cls"）;
showProgInform（）;
printf（"Allrecordsforclass:
%s,term:
%d;totalrecordnubmer:
%ld\n",classID,term,size）;
printf（"********************************************************\n"）;
for（i=0;itotal=r[i].chinese+r[i].english+r[i].math;
ave=（float）total/3;
printf（"%s:
（CHI）%d（MAT）%d（ENG）%d（Total）%d（Ave）%.2f\r\n",r[i].name,r[i].chinese,r[i].math,r[i].english,total,ave）;
}
printf（"********************************************************\n\n"）;
printf（"PressEntertoreturnSelectsubmenu\n"）;
getchar（）;
}
/*对某一班级一学期的所有记录按平均分排序*/
voidsortSelectByAve（structrecord*r,longsize）{
FILE*fp;
structrecordtemp;
floatouterAve,innerAve;
inttotal;
longi,j;
system（"cls"）;
showProgInform（）;
printf（"\nSortedtherecordsbyaveragescore\n"）;
for（i=0;iouterAve=（float）（r[i].chinese+r[i].math+r[i].english）/3;
for（j=i+1;jinnerAve=（float）（r[j].chinese+r[j].math+r[j].english）/3;
if（innerAve>outerAve）{
/*由于是同一班级同一学期，所以只需修改以下四项*/
strcpy（temp.name,r[j].name）;
temp.chinese=r[j].chinese;
temp.math=r[j].math;
temp.english=r[j].english;
strcpy（r[j].name,r[i].name）;
r[j].chinese=r[i].chinese;
r[j].math=r[i].math;
r[j].english=r[i].english;
strcpy（r[i].name,temp.name）;
r[i].chinese=temp.chinese;
r[i].math=temp.math;
r[i].english=temp.english;
}
}
}
printf（"\nshowsortedrecords\n"）;
printf（"********************************************\n"）;
for（i=0;itotal=r[i].chinese+r[i].math+r[i].english;
innerAve=（float）total/3;
printf（"%s:
%d%d%d%d%f\n",r[i].name,r[i].chinese,r[i].math,r[i].english,total,innerAve）;
}
printf（"********************************************\n"）;
/*输出排序后结果到文件中*/
printf（"writesortedrecordsto\"sorted.txt\"\n"）;
if（（fp=fopen（"sorted.txt","w"））==NULL）{
printf（"opensort.txtfailed\n"）;
return;
}
for（i=0;itotal=r[i].chinese+r[i].math+r[i].english;
innerAve=（float）total/3;
fprintf（fp,"（CLASS-TERM）%s-%d（NAME）%s:
（CHI）%3d（MAT）%3d（ENG）%3d（TOTAL）%4d（AVERG）%.2f\r\n",r[i].classID,r[i].term,r[i].name,r[i].chinese,r[i].math,r[i].english,total,innerAve）;
}
printf（"writefilesorted.txtfinished\n"）;
fclose（fp）;
printf（"\nPressanykeytoreturnSelectsubMenu\n"）;
}
voidnoPass（structrecord*r,intsize）{
longi=0,j=0;
FILE*fp;
if（（fp=fopen（"no-pass.txt","w"））==NULL）{
printf（"createno-pass.txtfailed"）;
return;
}
system（"cls"）;
showProgInform（）;
printf（"Mention:
ThefollowingoperationwillbeallontheclassIdandtermyouinput\n\n"）;
printf（"\nShowstudentthatonesubjectisno-pass\n"）;
printf（"***********************************************\n"）;
for（i=0;iif（r[i].chinese<60||r[i].math<60||r[i].english<60）{
printf（"%s-%d%s:
",r[i].classID,r[i].term,r[i].name）;
fprintf（fp,"%s-%d%s:
",r[i].classID,r[i].term,r[i].name）;
if（r[i].chinese<60）{
printf（"（Chinese）%d",r[i].chinese）;
fprintf（fp,"（Chinese）%d",r[i].chinese）;
}
if（r[i].math<60）{
printf（"（Math）%d",r[i].math）;
fprintf（fp,"（Math）%d",r[i].math）;
}
if（r[i].english<60）{
printf（"（English）%d",r[i].english）;
fprintf（fp,"（English）%d",r[i].english）;
}
printf（"\r\n"）;
fprintf（fp,"\r\n"）;
}
}
printf（"***********************************************\n"）;
fclose（fp）;
printf（"PressEntertoreturn\"Select\"submenu\n"）;
}
/*查询记录*/
voidselectRecord（）{
charclassID[CLASSLEN];
intterm;
FILE*fp;
longfsize=0,arraySize=0,thisSize=0,i=0,j=0;
structrecord*allRcd,*thisClass;
system（"cls"）;
showProgInform（）;
printf（"Mention:
ThefollowingoperationwillbeallontheclassIdandtermyouinput\n\n"）;
printf（"Mention:
pleaseoperatebythefollowinginstructions\n\n"）;
printf（"InputClassID:
"）;
scanf（"%s",classID）;
printf（"Inputtermnumber:
"）;
scanf（"%d",&term）;
/*选出班级学期对应的数据暂存起来*/
if（（fp=fopen（"stu_score.rcd","r"））==NULL）{
printf（"\nWarining:
Norecordexists!
\n"）;
return;
}
fseek（fp,0,SEEK_END）;
fsize=ftell（fp）;
arraySize=fsize/（sizeof（structrecord））;
allRcd=（structrecord*）calloc（arraySize,sizeof（structrecord））;
rewind（fp）;
fread（allRcd,sizeof（structrecord）,arraySize,fp）;
printf（"PressEntertoshowthesubmenuofSelectmenu\n"）;
for（i=0;iif（strcmp（classID,allRcd[i].classID）==0&&term==allRcd[i].term）{
thisSize++;
}
}
if（thisSize==0）{
printf（"\nWaring:
NorecordforClass%sTerm%d\n",classID,term）;
fclose（fp）;
free（allRcd）;
return;
}
/*本班的数据空间,用于后在面的计算，排序，显示等功能*/
thisClass=（structrecord*）calloc（thisSize,sizeof（structrecord））;
j=0;
for（i=0;iif（strcmp（classID,allRcd[i].classID）==0&&term==allRcd[i].term）{
strcpy（thisClass[j].classID,classID）;
thisClass[j].term=term;
strcpy（thisClass[j].name,allRcd[i].name）;
thisClass[j].chinese=allRcd[i].chinese;
thisClass[j].ma
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