学生成绩录入查询系统C语言程序

#include<iostream>

#include<string.h>

using

namespace

std

struct

student

{

char

name[50]

int

score

}

void

teacherC(student

*stu)//老师录入成绩

{

int

i,n

cout<<"请输入需要录入的学生的个数\n"

cin>>n

cout<<"请依次输入学生的姓名和成绩\n"

for(i=0i<ni++)

{

cin>>stu[i].name>>stu[i].score

}

stu[i].score=-1

}

void

show(student

*stu)

{

int

i=0

for(i<100i++)

{

if(stu[i].score==-1)

break

cout<<stu[i].name<<"

"<<stu[i].score<<endl

}

}

int

search(student

*stu,char

*name)

{

int

i=0,k=-1

for(i<100i++)

{

if(stu[i].score==-1)

break

if(strcmp(stu[i].name,name)==0)

{

k=i

break

}

}

return

k

}

void

edit(student

*stu)

{

int

i=0,j=0

char

name[30],an

while(1)

{

cout<<"请输入需要修改的学生名字\n"

cin>>name

i=search(stu,name)

if(i>=0)

{

cout<<"该学生的信息为:\n"

cout<<stu[i].name<<"

"<<stu[i].score<<endl

cout<<"确定要修改该学生的信息是的输入Y不是输入N:\n"

cin>>an

if(an=='Y'||an=='y')

{

cout<<"请输入修改后的姓名成绩:\n"

cin>>stu[i].name>>stu[i].score

cout<<"修改成功\n"

}

cout<<"继续修改请输入1退出输入0:\n"

cin>>j

if(j==0)

break

}

else

cout<<"没有该学生的信息\n"

}

}

void

dele(student

*stu)

{

int

i=0,j=0

char

name[30],an

while(1)

{

cout<<"请输入需要删除的学生名字\n"

cin>>name

i=search(stu,name)

if(i>0)

{

cout<<"该学生的信息为:\n"

cout<<stu[i].name<<"

"<<stu[i].score<<endl

cout<<"确定要删除该学生的信息是的输入Y不是输入N:\n"

cin>>an

if(an=='Y'||an=='y')

{

*stu[i].name=0

cout<<"删除成功\n"

}

cout<<"继续删除请输入1退出输入0:\n"

cin>>j

if(j==0)

break

}

else

cout<<"没有该学生的信息\n"

}

}

int

main()

{

int

i,n

char

name[30]

student

stu[100]//学生总数上限为100个

while(1)

{

cout<<"请做出以下的选择："<<endl

cout<<"输入

0

退出系统\n"

cout<<"输入

1

教书录入成绩\n"

cout<<"输入

2

学生查询成绩\n"

cout<<"输入

3

修改学生成绩\n"

cout<<"输入

4

删除学生成绩\n"

cin>>i

switch(i)

{

case

1:

teacherC(stu)break

case

2:

cout<<"请输入查询的姓名\n"

cin>>namen=search(stu,name)cout<<"该学生成绩是："<<stu[n].score<<endlbreak

case

3:

edit(stu)break

case

4:

dele(stu)break

default:if(i!=0)cout<<"请输入有效数字\n"

}

if(i==0)

break

}

return

0

}

这里有一个类

实现学生学号，数学，语文，英语成绩录入

并且计算平均成绩，按照平均成绩高低输出信息

你可以改改！

//实现简单的学生信息输入输出和初步的成绩排序

public

class

student

{

private

int

id

//学号

private

int

mathscore

//数学成绩

private

int

chinscore

//语文成绩

private

int

forescore

//外语成绩

public

student()

{

id

=

0

mathscore

=

0

chinscore

=

0

forescore

=

0

}

public

student(int

newid,

int

newmathscore,

int

newchinsvore,

int

newforescore)

{

id

=

newid

mathscore

=

newmathscore

chinscore

=

newchinsvore

forescore

=

newforescore

}

public

double

getaveragescore()

{

//求平均成绩

double

averagescore

=

((double)

mathscore

+

chinscore

+

forescore)

/

3

return

averagescore

}

public

void

output(student

student)

{

//输出对象的内容

system.out.println("

"

+

student.id

+

"

"

+

student.mathscore

+

"

"

+

student.chinscore

+

"

"

+

student.forescore

+

"

"

+

student.getaveragescore())

}

public

int

max(student

a[],

int

n)

{

//student类对象数组的前n项中的成绩最大值的索引

int

position

=

0

for

(int

i

=

1

i

<

n

i++)

{

if

(a[i].getaveragescore()

>

a[position].getaveragescore())

{

//比较平均成绩

position

=

i

}

}

return

position

}

public

void

selectsort(student

a[])

{

//student类对象数组的选择排序

for

(int

n

=

a.length

n

>

1

n--)

{

int

i

=

max(a,

n)

student

temp

=

a[i]

a[i]

=

a[n

-

1]

a[n

-

1]

=

temp

}

}

}

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