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c语言问题急求答案①输入5个学生的数据信息，包括学生的籍管学号，姓名，理源数学、码c码英语和语文三门课程的学籍系统pythoncbv源码流程成绩并统计平均成绩；②系统中学生数据的排列顺序，初始时是管理易语言sql源码按照输入顺序排列的；根据使用者的选择，可以按照学号由低向高排序，语言学语言源代也可以按照平均成绩由高向低排序；求大神
ç¨cè¯è¨ç¼åä¸ä¸ªå¦ç管çç³»ç»
#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
using namespace std;
class student
{
protected:
int number;
char name[];
char sex[6];
char place[];
char nation[6];
char birth[];
char party[];
char id[];
double score[3];
public:
student *next;
student(){ }
~student(){ }
char* getname(){ return name; }
int getnumber(){ return number;}
double getscore(int i) { return score[3];}
float getg(){ return (score[0]+score[1]+score[2]); }
void input()
{
int e=1;
cout<<"\t\t\tææ示è¾å ¥:"<<endl;
cout<<"\t\tè¾å ¥ç¼å·: ";
cin>>number;
cout<<"\t\tè¾å ¥å§å: ";
cin>>name;
do
{
cout<<"\t\tè¾å ¥æ§å«: ";
cin>>sex;
if(strcmp(sex,籍管"ç·")==0 || strcmp(sex,"女")==0)
{
cout<<"\t\tè¾å ¥ç±è´¯: ";
cin>>place;
cout<<"\t\tè¾å ¥æ°æ: ";
cin>>nation;
cout<<"\t\tè¾å ¥çæ¥: ";
cin>>birth;
cout<<"\t\tè¾å ¥æ¿æ²»é¢è²: ";
cin>>party;
cout<<"\t\tè¾å ¥èº«ä»½è¯å·: ";
cin>>id;
cout<<"\t\tè¾å ¥æ°å¦åæ°: ";
cin>>score[0];
cout<<"\t\tè¾å ¥è±è¯åæ°: ";
cin>>score[1];
cout<<"\t\tè¾å ¥è®¡ç®æºåæ°: ";
cin>>score[2];
e=0;
}
else
{
cout<<"\t\t\tæ æ¤ç±»åæ§å«!éæ°è¾å ¥!"<<endl;
e=1;
}
}while(e);
return ;
}
void input(ifstream & is)
{
is>>number>>name>>sex>>place>>nation>>birth>>party>>id
>>score[0]>>score[1]>>score[2];
is.get();
}
void output()
{
cout<<"å¦çåºæ¬ä¿¡æ¯å¦ä¸:"<<endl;
cout<<"ç¼å·:"<<number
<<" å§å:"<<name
<<" æ§å«:"<<sex
<<" ç±è´¯:"<<place
<<" æ°æ:"<<nation
<<" çæ¥:"<<birth
<<" æ¿æ²»é¢è²:"<<party<<endl
<<"身份è¯å·:"<<id
<<" æ°å¦:"<<score[0]
<<" è±è¯:"<<score[1]
<<" 计ç®æº:"<<score[2]
<<" æ»å:"<<getg()<<endl<<endl;
}
void output(ofstream & os)
{
os<<setw(6)<<number
<<setw()<<name
<<setw(6)<<sex
<<setw()<<place
<<setw(6)<<nation
<<setw()<<birth
<<setw()<<party
<<setw()<<id
<<setw(6)<<score[0]
<<setw(6)<<score[1]
<<setw(6)<<score[2]<<endl;
}
};
class school
{
public:
school(){ head=new student; head->next=NULL; key=0; }
~school(){ delete head; }
void input();
void mend();
void del();
int find(student **p,int num,char *pn="^");
void found();
void show();
void count();
void save();
void begin();
void clear();
char mainmenu();
int getkey(){ return key;}
void setkey(int k){ key=k; }
private:
student *head;
int key;
};
//å½å ¥å½æ°
void school::input()
{
student *p,*p2=NULL;
p=head;
int n;
while(p->next)
p=p->next;
while(n)
{
p2=new student;
p2->input();
p->next=p2;
p2->next=NULL;
p=p->next;
school::setkey(1);
cout<<"\t\t\tæ1继ç»,æ0è¿å : ";
cin>>n;
}
}
//åæ¥æ¾å½æ°
int school::find(student **p1,int num,char *pn)
{
student *p;
p=head;
while(p->next)
{
(*p1)=p;
if( (p->next)->getnumber()==num||!strcmp( (p->next)->getname(),pn ) )
return 1;
p=p->next;
}
return 0;
}
//æ¥æ¾å½æ°
void school::found()
{
student *p;
int num=-1,n=9;
char name[]="^";
do
{
cout<<"\t\t1:æç¼å·æ¥æ¾,2:æå§åæ¥æ¾: ";
cin>>n;
}while(n<1||n>2);
if(n==1)
{
cout<<"\t\t\tè¾å ¥ç¼å·: ";
cin>>num;
}
if(n==2)
{
cout<<"\t\t\tè¾å ¥å§å: ";
cin>>name;
}
if(!find(&p,num,name) )
{
cout<<"\t\tæ¾ä¸å°ä½ è¦æ¥æ¾çå 容!"<<endl;
return;
}
(p->next)->output();
}
//å é¤å½æ°
void school::del()
{
student *p,*p2;
int num;
cout<<"\t\t\tè¾å ¥ç¼å·: ";
cin>>num;
if( !find(&p,num,"^") )
{
cout<<"\t\tæ¾ä¸å°ä½ è¦å é¤çå 容!"<<endl;
return;
}
(p->next)->output();
p2=p->next;
p->next=p2->next;
delete p2;
school::setkey(1);
}
//æ¾ç¤ºå½æ°
void school::show()
{
student *p;
p=head;
while(p->next)
{
(p->next)->output();
p=p->next;
}
}
//ä¿®æ¹å½æ°
void school::mend()
{
student *p;
int num=-1,n;
char name[]="^";
do
{
cout<<"\t\t1:æç¼å·ä¿®æ¹,2:æå§åä¿®æ¹: ";
cin>>n;
}while(n<1||n>2);
if(n==1)
{
cout<<"\t\t\tè¾å ¥ç¼å·: ";
cin>>num;
}
if(n==2)
{
cout<<"\t\t\tè¾å ¥å§å: ";
cin>>name;
}
if( !find(&p,num,name) )
{
cout<<"\t\tæ¾ä¸å°ä½ è¦ä¿®æ¹çå 容!"<<endl;
return;
}
(p->next)->output();
(p->next)->input();
school::setkey(1);
}
//ä¿åå½æ°
void school::save()
{
student *p;
p=head;
ofstream os("student.txt",ios::out);
if (school::getkey()==1)
{
while(p->next)
{
(p->next)->output(os);
p=p->next;
}
}
cout<<"\t\t\tæ件已ä¿å! "<<endl;
school::setkey(0);
}
//åå§åå½æ°
void school::begin()
{
student *p,*p2;
p=head;
clear();
long t;
ifstream is("student.txt",ios::in);
if(!is)
{
ofstream os("student.txt",ios::out);
os.close();
return ;
}
int num=-1;
while(1)
{
num=-1;
t=is.tellg();
is>>num;
is.seekg(t);
if(num<0)
{
is.close();
return;
}
p2=new student;
p2->input(is);
p->next=p2;
p2->next=NULL;
p=p->next;
}
}
//æ¸ ç©ºå½æ°
void school::clear()
{
student *p,*p2;
p=head->next;
while( p )
{
p2=p;
p=p->next;
delete p2;
}
}
//ç»è®¡å½æ°
void school::count()
{
student *p;
p=head;
int n=0;
double g[3]={ 0,0,0};
float j[3]={ 0,0,0};
while(p->next)
{
p=p->next;
n++;
for(int i=0;i<3;i++)
{
g[++i]=g[i]+( p->getscore(i) );
(p->getscore(i) )>=? j[i++] : 0 ;
}
}
cout<<"\t\t\b\b\b\bæ°å¦æ»å:"<<g[0]<<" å¹³åå:"<<g[0]/n
<<" åæ ¼ç:"<<j[0]/n<<endl<<"\t\t\b\b\b\bè±è¯æ»å:"<<g[1]
<<" å¹³åå:"<<g[1]/n<<" åæ ¼ç:"<<j[1]/n<<endl
<<"\t\t\b\b\b\b计ç®æºæ»å: "<<g[2]<<" å¹³åå: "<<g[2]/n
<<" åæ ¼ç:"<<j[2]/n<<endl;
}
//主éèåå½æ°
char school::mainmenu()
{
char n[6];
cout<<"\n\n ââââ欢è¿è¿å ¥é«æ ¡å¦ç±ç®¡çç³»ç»ââââ"<<endl<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" * * 1: å½å ¥å¦çä¿¡æ¯ * *"<<endl
<<" * * 2: æ¾ç¤ºå¦çä¿¡æ¯ * *"<<endl
<<" * * 3: æ¥æ¾å¦çä¿¡æ¯ * *"<<endl
<<" * * 4: å é¤å¦çä¿¡æ¯ * *"<<endl
<<" * * 5: ä¿®æ¹å¦çä¿¡æ¯ * *"<<endl
<<" * * 6: ç»è®¡å¦çæ绩 * *"<<endl
<<" * * 7: ä¿åå¦çä¿¡æ¯ * *"<<endl
<<" * * 0: éåºç³»ç» * *"<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" 请éæ©:";
cin>>n;
return n[0];
}
//主å½æ°
void main()
{
school pp;
int k=1;
char n;
pp.begin();
while(k==1)
{
n=pp.mainmenu();
switch(n)
{
case '1':pp.input(); break;
case '2':pp.show(); break;
case '3':pp.found(); break;
case '4':pp.del(); break;
case '5':pp.mend(); break;
case '6':pp.count(); break;
case '7':pp.save(); break;
case '0':
if(pp.getkey()==1)
{
cout<<"\t\t\tæ¯å¦ä¿å? 1 : ä¿å 0:ä¸ä¿å : ";
cin>>k;
if(k==1)
pp.save();
}
pp.clear();
k=0;
break;
}
}
}
学籍管理系统学生信息录入模块c语言程序
给个参考你:/*编制一个学生成绩管理系统，每个学生信息包括：学号、理源姓名、码c码C语言、学籍系统高数和英语成绩。管理具体功能：（1）创建信息链表并以磁盘文件保存；（2）读取磁盘文件并显示输出所有学生的语言学语言源代psd空间源码社区成绩；（3）按学号或姓名查询成绩；（4）添加成绩记录；（5）修改指定姓名或学号的学生的成绩并可存盘；（6）显示输出分以下、~、籍管~、理源分以上各分数段的学生信息。以C语言成绩为例*/#include#include#include#include#defineNtypedefstruct{ charname[];intnum;floatc;floatmath;floatenglish;floataver;}stu;//菜单voidmenu()/*便于操作员使用*/{ /*清屏*/system("cls");printf("学生平时成绩管理\n");printf("=======================\n");printf("1.成绩录入\n");printf("2.计算\n");printf("3.查询\n");printf("4.修改\n");printf("5.插入\n");printf("6.显示\n");printf("7.统计\n");printf("8.删除\n");printf("0.退出\n");printf("=======================\n");printf("请选择相应的retrofit2.0源码功能:");}//成绩录入voidinput(){ FILE*fp;stuxs;/*定义一个结构体变量来装从文件中读出来的数据*/if((fp=fopen("student.dat","ab"))==NULL){ printf("can'topenfile!\n");exit(0);}printf("\n录入格式:姓名学号C语言高数英语当输入姓名为ps结束录入\n");while(1)/*中间加油break，可使循环中断*/{ scanf("%s",xs.name);if(strcmp(xs.name,"ps")==0)break;/*判断姓名是否为ps，用字符串判断*/scanf("%d%f%f%f",&xs.num,&xs.c,&xs.math,&xs.english);xs.aver=0;/*给平均分变量赋初值*/fwrite(&xs,sizeof(stu),1,fp);//将成绩信息写入文件}fclose(fp);}//计算平均分voidsum(){ inti=0,n;stuxs[N];FILE*fp;if((fp=fopen("student.dat","rb+"))==NULL){ printf("can'topenfile!\n");exit(0);}while(!feof(fp))/*文件读入内存，读取指针未到文件尾时返回值为0，读到尾时返回值为1，南京棋牌app 源码加！取反后，结束即为0*/{ fread(&xs[i],sizeof(stu),1,fp);/*读入结构体变量*/if(feof(fp))break;/*上面while循环那个会多读一次因为读到尾时那个0还没返回，这里判断如果以读到文件尾，则直接停止，避免重复输入*/xs[i].aver=(xs[i].c+xs[i].math+xs[i].english)/3;i++;}n=i;/*把i的末尾值给n，用于下面循环写入*/i=0;fclose(fp);if((fp=fopen("student.dat","wb"))==NULL){ printf("can'topenfile!\n");exit(0);}while(i=0)/*k的位置要位于数组范围之内*/{ //插入for(j=lenth-1;j>=k;j--)xs[j+1]=xs[j];/*一开始j是最大的，往后移一个这样移动避免数据被覆盖*//*循环是只循环这一句的*/xs[k]=s;/*将输入的学生信息加入这个k位置*/lenth++;/*长度+1*///写回if((fp=fopen("student.dat","wb"))==NULL){ printf("不能建立文件!!\n");exit(0);}for(i=0;i=&&s[i].c=&&s[i].c=){ p4[m++]=&s[i++];continue;}}printf("不及格：姓名学号C语言\n");for(n=0;nname,p1[n]->num,p1[n]->c);}printf("-：姓名学号C语言\n");for(p=0;pname,p2[p]->num,p2[p]->c);}printf("-：姓名学号C语言\n");for(q=0;qname,p3[q]->num,p3[q]->c);}printf("以上：姓名学号C语言\n");for(r=0;rname,p4[r]->num,p4[r]->c);}fclose(fp);getch();}//删除:输入学生姓名，若该学生存在，则删除，并显示删除后余下的学生成绩信息voiddele(){ stuxs[N];FILE*fp;charname[];inti=0,len,k=-1/*k=0)/*k>0说明找到删除学生位置*/{ if((fp=fopen("student.dat","wb+"))==NULL){ printf("can'topenfile!\n");exit(0);}for(i=0;i
用c语言编写一个学生学籍管理系统
#include<iostream>
#include<string>
#include<fstream>
#include<iomanip>
using namespace std;
class student
{
protected:
int number;
char name[];
char sex[6];
char place[];
char nation[6];
char birth[];
char party[];
char id[];
double score[3];
public:
student *next;
student(){ }
~student(){ }
char* getname(){ return name; }
int getnumber(){ return number;}
double getscore(int i) { return score[3];}
float getg(){ return (score[0]+score[1]+score[2]); }
void input()
{
int e=1;
cout<<"\t\t\t按提示输入:"<<endl;
cout<<"\t\t输入编号: ";
cin>>number;
cout<<"\t\t输入姓名: ";
cin>>name;
do
{
cout<<"\t\t输入性别: ";
cin>>sex;
if(strcmp(sex,"男")==0 || strcmp(sex,"女")==0)
{
cout<<"\t\t输入籍贯: ";
cin>>place;
cout<<"\t\t输入民族: ";
cin>>nation;
cout<<"\t\t输入生日: ";
cin>>birth;
cout<<"\t\t输入政治面貌: ";
cin>>party;
cout<<"\t\t输入身份证号: ";
cin>>id;
cout<<"\t\t输入数学分数: ";
cin>>score[0];
cout<<"\t\t输入英语分数: ";
cin>>score[1];
cout<<"\t\t输入计算机分数: ";
cin>>score[2];
e=0;
}
else
{
cout<<"\t\t\t无此类型性别!重新输入!"<<endl;
e=1;
}
}while(e);
return ;
}
void input(ifstream & is)
{
is>>number>>name>>sex>>place>>nation>>birth>>party>>id
>>score[0]>>score[1]>>score[2];
is.get();
}
void output()
{
cout<<"学生基本信息如下:"<<endl;
cout<<"编号:"<<number
<<" 姓名:"<<name
<<" 性别:"<<sex
<<" 籍贯:"<<place
<<" 民族:"<<nation
<<" 生日:"<<birth
<<" 政治面貌:"<<party<<endl
<<"身份证号:"<<id
<<" 数学:"<<score[0]
<<" 英语:"<<score[1]
<<" 计算机:"<<score[2]
<<" 总分:"<<getg()<<endl<<endl;
}
void output(ofstream & os)
{
os<<setw(6)<<number
<<setw()<<name
<<setw(6)<<sex
<<setw()<<place
<<setw(6)<<nation
<<setw()<<birth
<<setw()<<party
<<setw()<<id
<<setw(6)<<score[0]
<<setw(6)<<score[1]
<<setw(6)<<score[2]<<endl;
}
};
class school
{
public:
school(){ head=new student; head->next=NULL; key=0; }
~school(){ delete head; }
void input();
void mend();
void del();
int find(student **p,int num,char *pn="^");
void found();
void show();
void count();
void save();
void begin();
void clear();
char mainmenu();
int getkey(){ return key;}
void setkey(int k){ key=k; }
private:
student *head;
int key;
};
//录入函数
void school::input()
{
student *p,*p2=NULL;
p=head;
int n;
while(p->next)
p=p->next;
while(n)
{
p2=new student;
p2->input();
p->next=p2;
p2->next=NULL;
p=p->next;
school::setkey(1);
cout<<"\t\t\t按1继续,按0返回 : ";
cin>>n;
}
}
//子查找函数
int school::find(student **p1,int num,char *pn)
{
student *p;
p=head;
while(p->next)
{
(*p1)=p;
if( (p->next)->getnumber()==num||!strcmp( (p->next)->getname(),pn ) )
return 1;
p=p->next;
}
return 0;
}
//查找函数
void school::found()
{
student *p;
int num=-1,n=9;
char name[]="^";
do
{
cout<<"\t\t1:按编号查找,2:按姓名查找: ";
cin>>n;
}while(n<1||n>2);
if(n==1)
{
cout<<"\t\t\t输入编号: ";
cin>>num;
}
if(n==2)
{
cout<<"\t\t\t输入姓名: ";
cin>>name;
}
if(!find(&p,num,name) )
{
cout<<"\t\t找不到你要查找的内容!"<<endl;
return;
}
(p->next)->output();
}
//删除函数
void school::del()
{
student *p,*p2;
int num;
cout<<"\t\t\t输入编号: ";
cin>>num;
if( !find(&p,num,"^") )
{
cout<<"\t\t找不到你要删除的内容!"<<endl;
return;
}
(p->next)->output();
p2=p->next;
p->next=p2->next;
delete p2;
school::setkey(1);
}
//显示函数
void school::show()
{
student *p;
p=head;
while(p->next)
{
(p->next)->output();
p=p->next;
}
}
//修改函数
void school::mend()
{
student *p;
int num=-1,n;
char name[]="^";
do
{
cout<<"\t\t1:按编号修改,2:按姓名修改: ";
cin>>n;
}while(n<1||n>2);
if(n==1)
{
cout<<"\t\t\t输入编号: ";
cin>>num;
}
if(n==2)
{
cout<<"\t\t\t输入姓名: ";
cin>>name;
}
if( !find(&p,num,name) )
{
cout<<"\t\t找不到你要修改的内容!"<<endl;
return;
}
(p->next)->output();
(p->next)->input();
school::setkey(1);
}
//保存函数
void school::save()
{
student *p;
p=head;
ofstream os("student.txt",ios::out);
if (school::getkey()==1)
{
while(p->next)
{
(p->next)->output(os);
p=p->next;
}
}
cout<<"\t\t\t文件已保存! "<<endl;
school::setkey(0);
}
//初始化函数
void school::begin()
{
student *p,*p2;
p=head;
clear();
long t;
ifstream is("student.txt",ios::in);
if(!is)
{
ofstream os("student.txt",ios::out);
os.close();
return ;
}
int num=-1;
while(1)
{
num=-1;
t=is.tellg();
is>>num;
is.seekg(t);
if(num<0)
{
is.close();
return;
}
p2=new student;
p2->input(is);
p->next=p2;
p2->next=NULL;
p=p->next;
}
}
//清空函数
void school::clear()
{
student *p,*p2;
p=head->next;
while( p )
{
p2=p;
p=p->next;
delete p2;
}
}
//统计函数
void school::count()
{
student *p;
p=head;
int n=0;
double g[3]={ 0,0,0};
float j[3]={ 0,0,0};
while(p->next)
{
p=p->next;
n++;
for(int i=0;i<3;i++)
{
g[++i]=g[i]+( p->getscore(i) );
(p->getscore(i) )>=? j[i++] : 0 ;
}
}
cout<<"\t\t\b\b\b\b数学总分:"<<g[0]<<" 平均分:"<<g[0]/n
<<" 及格率:"<<j[0]/n<<endl<<"\t\t\b\b\b\b英语总分:"<<g[1]
<<" 平均分:"<<g[1]/n<<" 及格率:"<<j[1]/n<<endl
<<"\t\t\b\b\b\b计算机总分: "<<g[2]<<" 平均分: "<<g[2]/n
<<" 及格率:"<<j[2]/n<<endl;
}
//主选菜单函数
char school::mainmenu()
{
char n[6];
cout<<"\n\n ☆☆☆☆欢迎进入高校学籍管理系统☆☆☆☆"<<endl<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" * * 1: 录入学生信息 * *"<<endl
<<" * * 2: 显示学生信息 * *"<<endl
<<" * * 3: 查找学生信息 * *"<<endl
<<" * * 4: 删除学生信息 * *"<<endl
<<" * * 5: 修改学生信息 * *"<<endl
<<" * * 6: 统计学生成绩 * *"<<endl
<<" * * 7: 保存学生信息 * *"<<endl
<<" * * 0: 退出系统 * *"<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" * * * * * * * * * * * * * * * * * * * * * * * * * * * *"<<endl
<<" 请选择:";
cin>>n;
return n[0];
}
//主函数
void main()
{
school pp;
int k=1;
char n;
pp.begin();
while(k==1)
{
n=pp.mainmenu();
switch(n)
{
case '1':pp.input(); break;
case '2':pp.show(); break;
case '3':pp.found(); break;
case '4':pp.del(); break;
case '5':pp.mend(); break;
case '6':pp.count(); break;
case '7':pp.save(); break;
case '0':
if(pp.getkey()==1)
{
cout<<"\t\t\t是否保存? 1 : 保存 0:不保存 : ";
cin>>k;
if(k==1)
pp.save();
}
pp.clear();
k=0;
break;
}
}
}
C语言学生信息管理系统程序相映论文!!
#ifndef H_STUDENT_HH
#define H_STUDENT_HH
#include "stdio.h"
#include "string.h"
#include "malloc.h"
#define LEN sizeof(struct message_student) /*一个结构体数组元素的长度*/
#define numsubs 5 /*学科数目*/
typedef struct message_student /*结构体定义*/
{
char number[6];
char name[];
char sex[4];
float subject[numsubs];
float score;
float average;
int index;
}student;
extern int numstus; /*学生数目*/
extern student *pointer; /*指向结构体数组*/
extern int lens;
int menu_select(); /*函数声明*/
int openfile(student stu[]);
int findrecord(student stud[]);
int writetotext(student stud[]);
void welcome();
void display1();
void showtable();
void sort(student stu[]);
void deleterecord(student stu[],int i);
void addrecord(student stud[]);
void display(student stud[],int n1,int n2);
void amendrecord(student stud[]);
void count(student stud[]);
void sortnum(student stud[]);
void sortnum2(student stud[]);
void sortname(student stud[]);
void sortname2(student stud[]);
void sortcount(student stud[]);
void sortcount2(student stud[]);
void statistic(student stud[]);
void display1();
#endif
//#include "head.h"
int menu_select()
{
char c;
printf("\n\n");
printf(" | 1. 增加学生记录 5.统计信息 |\n");
printf(" | 2. 查询学生记录 6.打开文件 |\n");
printf(" | 3. 修改学生记录 7.保存文件 |\n");
printf(" | 4. 学生纪录排序 8.显示记录 |\n");
printf(" | 0.退出系统 |\n");
printf("\n\n");
printf("请选择(0-8):");
c=getchar();
getchar();
return (c-'0');
}
//#include "head.h"
int findrecord(student stud[]) /*查找信息*/
{
char str[2];
int i,num;
if(numstus==0)
{
printf("没有可被查找的记录\n");
return -1;
}
else
{
printf("以何种方式查找？\n1.学号\t2.姓名\t3.名次\n");
gets(str);
if(str[0]=='1') /*按学号查找*/
{
printf("请输入学号:");
gets(str);
for(i=0;i<=numstus;i++)
if(strcmp(str,stud[i].number)==0)
{
display(stud,i,i);
break;
}
else continue;
}
else if(str[0]=='2') /*按姓名查找*/
{
printf("请输入姓名:");
gets(str);
for(i=0;i<=numstus;i++)
if(strcmp(str,stud[i].name)==0)
{
display(stud,i,i);
break;
}
else continue;
}
else if(str[0]=='3') /*按名次查找*/
{
printf("请输入名次:");
scanf("%d",&num);
getchar();
for(i=0;i<=numstus;i++)
if(num==stud[i].index)
{
display(stud,i,i);
break;
}
else continue;
}
if(i>numstus)
{
printf("没有查找所要的信息。\n");
return -1;
}
return i;
}
}
//#include"head.h"
int openfile(student stu[])
{
int i=0,j;
FILE *fp;
char filename[],str[2];
if(numstus!=0)
{
printf("已经有记录存在，是否保存?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
writetotext(stu);
}
printf("请输入文件名:");
gets(filename);
numstus=0;
if((fp=fopen(filename,"rb+"))==NULL)
{
printf("无法打开该文件\n");
return(-1);
}
fscanf(fp,"%d",&numstus);
fgetc(fp);
while(i<numstus)
{
fscanf(fp,"%s",stu[i].number);
fscanf(fp,"%s",stu[i].name);
fscanf(fp,"%s",stu[i].sex);
for(j=0;j<numsubs;j++)
fscanf(fp,"%f",&stu[i].subject[j]);
fscanf(fp,"%f",&stu[i].score);
fscanf(fp,"%f",&stu[i].average);
fscanf(fp,"%d",&stu[i].index);
i++;
}
fclose(fp);
printf("文件读取成功\n");
printf("是否显示纪录?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y')
display(stu,0,numstus-1);
return(0);
}
//#include "head.h"
void sort(student stud[])
{
int i,j=0;
char str[5];
student *p;
p=stud;
if(numstus==0)
{
printf("没有可供查询的记录!");
}
while(1)
{
for(i=0;;i++)
{
printf(" 请输入查询方式:");
printf("（直接输入回车则结束查询操作）\n");
printf("1.按照学号\t");
printf("2.按照姓名\t");
printf("3.按照名次\n");
gets(str);
if(strlen(str)==0) break;
if(str[0]=='1')
{
printf("请输入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortnum2(p);
else
sortnum(p);
display(stud,0,numstus-1);
}
else if(str[0]=='2')
{
printf("请输入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortname2(p);
else
sortname(p);
display(stud,0,numstus-1);
}
else if(str[0]=='3')
{
printf("请输入排序次序：\n");
printf("1.升序排列\t");
printf("2.降序排列\n");
gets(str);
if(str[0]=='1')
sortcount2(p);
else
sortcount(p);
display(stud,0,numstus-1);
}
else printf("请输入1~3");
printf("是否退出排序?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y') break;
}
return;
}
}
void sortnum(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j+1].number,stud[j].number)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortnum2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j].number,stud[j+1].number)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortname(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j+1].name,stud[j].name)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortname2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(strcmp(stud[j].name,stud[j+1].name)>0)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortcount(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(stud[j+1].index>stud[j].index)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
void sortcount2(student stud[])
{
int i,j;
student temp;
student *p;
p=stud;
for(i=0;i<numstus;i++)
for(j=0;j<numstus-i-1;j++)
{
if(stud[j].index>stud[j+1].index)
{
temp=*(p+j);
*(p+j)=*(p+j+1);
*(p+j+1)=temp;
}
}
}
//#include"head.h"
void statistic(student stud[]) /*新增功能，输出统计信息*/
{
int i,j=0,k=0;
char c1,str[2];
float average[numsubs],sum=0;
if(numstus==0)
printf("没有可被查找的记录\n");
else
{
while(1)
{
printf("下面将统计考试成绩\n");
printf("请选择你要统计哪科的成绩 1.A\t2.B\t3.C\t4.D\t5.E\n");
c1=getchar();
printf("\t一共有个%d记录\n",numstus); /*总共记录数*/
switch(c1)
{
case '1':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[0];
if(stud[k].subject[0]>stud[i].subject[0]) k=i;
if(stud[j].subject[0]<stud[i].subject[0]) j=i;
}
average[0]=sum/numstus;
printf("\t科目A的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[0]);
printf("\t科目A的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[0]);
printf("\t科目A的平均分是 %5.2f\n",average[0]); /*平均分*/
break;
case '2':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[1];
if(stud[k].subject[1]>stud[i].subject[1]) k=i;
if(stud[j].subject[1]<stud[i].subject[1]) j=i;
}
average[1]=sum/numstus;
printf("\t科目B的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[1]);
printf("\t科目B的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[1]);
printf("\t科目B的平均分是 %5.2f\n",average[1]); /*平均分*/
break;
case '3':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[2];
if(stud[k].subject[2]>stud[i].subject[2]) k=i;
if(stud[j].subject[2]<stud[i].subject[2]) j=i;
}
average[2]=sum/numstus;
printf("\t科目C的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[2]);
printf("\t科目C的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[2]);
printf("\t科目C的平均分是 %5.2f\n",average[2]); /*平均分*/
break;
case '4':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[3];
if(stud[k].subject[3]>stud[i].subject[3]) k=i;
if(stud[j].subject[3]<stud[i].subject[3]) j=i;
}
average[3]=sum/numstus;
printf("\t科目D的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[3]);
printf("\t科目D的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[3]);
printf("\t科目D的平均分是 %5.2f\n",average[3]); /*平均分*/
break;
case '5':
for(i=0;i<numstus;i++) /*循环输入判断*/
{
sum+=stud[i].subject[4];
if(stud[k].subject[4]>stud[i].subject[4]) k=i;
if(stud[j].subject[4]<stud[i].subject[4]) j=i;
}
average[4]=sum/numstus;
printf("\t科目E的最高分:\n"); /*最高分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[j].number,stud[j].name,stud[j].subject[4]);
printf("\t科目E的最低分是:\n"); /*最低分*/
printf("\t\t学号:%s 姓名:%s 分数:%.2f\n",stud[k].number,stud[k].name,stud[k].subject[4]);
printf("\t科目E的平均分是 %5.2f\n",average[4]); /*平均分*/
break;
default:printf("输入错误！请输入1~5之间的数\n");
}
sum=0;
getchar();
printf("是否继续进行统计?(y/n)");
gets(str);
if(str[0]=='y'||str[0]=='Y') ;
else break;
}
}
}
int writetotext(student stud[]) /*将所有记录写入文件*/
{
int i=0,j;
FILE *fp;
char filename[];
printf("输入文件名称:");
gets(filename);
fp=fopen(filename,"w");
fprintf(fp,"%d\n",numstus);
while(i<numstus)
{
fprintf(fp,"%s %s %s ",stud[i].number,stud[i].name,stud[i].sex);
for(j=0;j<numsubs;j++)
fprintf(fp,"%f ",stud[i].subject[j]);
fprintf(fp,"%f %f %d ",stud[i].score,stud[i].average,stud[i].index);
i++;
}
fclose(fp);
printf("已成功存储!\n");
display(stud,0,numstus-1);
numstus=0;
return 0;
}
void welcome()
{
printf("\t
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