C语言版学生成绩管理系统

2023-09-17 19:25:05 72
本文实例为大家分享了C语言版学生成绩管理系统的具体代码，供大家参考，具体内容如下
#include
#include
#include
#include
#include
#include
charbuf[255];
charc=14;
charpath[]="D:\\data";
chartmp[]="D:\\tmp";
structStudent
{
charName[20];
charNo[20];
charDept[20];
charClassNo[20];
doubleMath,Chinese,English;
doubleAve;
boolPass;
}students[500];
boolcmp1(Students1,Students2)
{
returns1.Chinese>s2.Chinese;
}
boolcmp2(Students1,Students2)
{
returns1.Math>s2.Math;
}
boolcmp3(Students1,Students2)
{
returns1.English>s2.English;
}
boolcmp4(Students1,Students2)
{
returns1.Ave>s2.Ave;
}
//---------------------------------------------------------voidSort(intcmd)
/*
1ChineseSort
2MathSort
3EnglishSort
4AveSort
*/
intSort(intcmd)
{
Studentstu;
FILE*fp=fopen(path,"ab+");
intn,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0))
{
students[cnt++]=stu;
}
fclose(fp);
switch(cmd)
{
case1:
std::sort(students,students+cnt,cmp1);
break;
case2:
std::sort(students,students+cnt,cmp2);
break;
case3:
std::sort(students,students+cnt,cmp3);
break;
case4:
std::sort(students,students+cnt,cmp4);
break;
default:
exit(0);
}
returncnt;
}
//---------------------------------------------------------PrintTitle()
voidPrintTitle()
{
printf("%-8s%-12s%-12s%-8s%-7s%-7s%-7s%-7s%-s\n","姓名","班级","学号","系院","语文","数学","英语","平均分","及格");
}
//---------------------------------------------------------Print(Studentstu)
voidPrint(Studentstu)
{
printf("%-8s%-12s%-12s%-8s%-7.2lf%-7.2lf%-7.2lf%-7.2lf%-s\n",stu.Name,stu.ClassNo,stu.No,stu.Dept,stu.Chinese,stu.Math,stu.English,stu.Ave,stu.Pass?"是":"否");
}
//---------------------------------------------------------PrintNo(charNo[])
voidPrintNo(charNo[])
{
Studentstu;
intn;
boolfind=0;
FILE*fp=fopen(path,"ab+");//以ab+方式打开防止data文件不存在时发生错误
while((n=fread(&stu,sizeof(stu),1,fp))>0)
{
if(!strcmp(stu.No,No))
{
find=1;
break;
}
}
fclose(fp);
if(find)
{
PrintTitle();
Print(stu);
}
else
puts("未找到！");
}
//---------------------------------------------------------PrintClass(charClassNo[])
voidPrintClass(charClassNo[])
{
Studentstu;
FILE*fp=fopen(path,"ab+");
intn,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0))
{
if(!strcmp(stu.ClassNo,ClassNo))
{
if(cnt==0)
PrintTitle();
Print(stu);
cnt++;
}
}
fclose(fp);
if(cnt==0)
puts("无数据");
else
printf("共%d条\n",cnt);
}
//---------------------------------------------------------PrintDept(charDept[])
voidPrintDept(charDept[])
{
Studentstu;
FILE*fp=fopen(path,"ab+");
intn,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0))
{
if(!strcmp(stu.Dept,Dept))
{
if(cnt==0)
PrintTitle();
Print(stu);
cnt++;
}
}
fclose(fp);
if(cnt==0)
puts("无数据");
else
printf("共%d条\n",cnt);
}
//---------------------------------------------------------PrintAll()
voidPrintAll()
{
Studentstu;
FILE*fp=fopen(path,"ab+");
intn,cnt=0;
while((n=fread(&stu,sizeof(stu),1,fp)>0))
{
if(cnt==0)
PrintTitle();
Print(stu);
cnt++;
}
fclose(fp);
if(cnt==0)
puts("无数据");
else
printf("共%d条\n",cnt);
}
//---------------------------------------------------------Input()
StudentInput()
{
Studentstu;
puts("请输入姓名、班级、学号、系院:");
scanf("%s%s%s%s",&stu.Name,&stu.ClassNo,&stu.No,&stu.Dept);
puts("请输入各科成绩：语文、数学、英语");
scanf("%lf%lf%lf",&stu.Chinese,&stu.Math,&stu.English);
stu.Ave=(stu.Chinese+stu.Math+stu.English)/3;
if(stu.Chinese>=60&&stu.Math>=60&&stu.English>=60)
stu.Pass=1;
else
stu.Pass=0;
returnstu;
}
//---------------------------------------------------------Insert()
voidInsert()
{
intcmd;
do{
Studentstu=Input();
FILE*fp=fopen(path,"ab+");
fwrite(&stu,sizeof(stu),1,fp);
fclose(fp);
puts("录入成功");
puts("继续录入吗？[1]是[0]否");
scanf("%d",&cmd);
}while(cmd==1);
}
//---------------------------------------------------------Del()
voidDel()
{
intcmd,cmd2;
charNo[20];
do{
puts("请输入要删除的学号：");
scanf("%s",&No);
Studentstu;
FILE*fp=fopen(path,"ab+");
FILE*fp2=fopen(tmp,"wb");
intn,find=0;
while((n=fread(&stu,sizeof(stu),1,fp))>0)
{
if(!strcmp(stu.No,No))
{
find=1;
Print(stu);
puts("确定要删除吗？[1]确定[0]取消");
scanf("%d",&cmd2);
if(cmd2==1)
puts("已删除");
else
fwrite(&stu,sizeof(stu),1,fp2);
}
else
fwrite(&stu,sizeof(stu),1,fp2);
}
fclose(fp);
fclose(fp2);
if(find==0)
{
printf("未找到学号%s\n",No);
remove(tmp);
}
else
{
remove(path);
rename(tmp,path);
}
puts("继续删除吗？[1]是[0]否");
scanf("%d",&cmd);
}while(cmd==1);
}
//---------------------------------------------------------Change()
voidChange()
{
intcmd;
charNo[20];
do{
puts("请输入要更改的学号：");
scanf("%s",&No);
Studentstu;
intfind=0;
FILE*fp=fopen(path,"ab+");
FILE*fp2=fopen(tmp,"wb");
intn;
while((n=fread(&stu,sizeof(stu),1,fp))>0)
{
if(!strcmp(stu.No,No))
{
find=1;
stu=Input();
fwrite(&stu,sizeof(stu),1,fp2);
}
else
fwrite(&stu,sizeof(stu),1,fp2);
}
fclose(fp);
fclose(fp2);
if(find)
{
remove(path);
rename(tmp,path);
puts("更改成功！");
}
else
{
printf("未找到学号%s\n",No);
remove(tmp);
}
puts("继续更改吗？[1]是[0]否");
scanf("%d",&cmd);
}while(cmd==1);
}
//---------------------------------------------------------AboutCourse
voidChinese()
{
doublesum=0,ave;
intpass=0,fail=0,better=0;
Studentstu;
FILE*fp=fopen(path,"ab+");
intn,cnt=Sort(1);
while((n=fread(&stu,sizeof(stu),1,fp))>0)
{
sum+=stu.Chinese;
if(stu.Chinese>=60)
{
pass++;
if(stu.Chinese>=80)
better++;
}
else
fail++;
}
ave=sum/cnt;
puts("语文成绩分析……");
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,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","语文");
for(inti=0;i0)
{
sum+=stu.Math;
if(stu.Math>=60)
{
pass++;
if(stu.Math>=80)
better++;
}
else
fail++;
}
ave=sum/cnt;
puts("数学成绩分析……");
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,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","数学");
for(inti=0;i0)
{
sum+=stu.English;
if(stu.English>=60)
{
pass++;
if(stu.English>=80)
better++;
}
else
fail++;
}
ave=sum/cnt;
puts("英语成绩分析……");
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,100.0*pass/cnt);
printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","英语");
for(inti=0;i0)
{
sum+=stu.Chinese;
sum+=stu.Math;
sum+=stu.English;
}
puts("平均成绩分析……");
printf("%-8s%-10s%-12s%-s\n","名次","姓名","学号","平均成绩");
for(inti=0;i
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。
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C语言版学生成绩管理系统

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