C++程序5
此程序为C++黑白界面上的学生信息管理系统
// student system.cpp : 定义控制台应用程序的入口点。
//
#include "stdafx.h"
#include <iostream>
#include <iomanip>
#include <fstream>
#include <string>
using namespace std;
class student
{
public:
char name[10];
double score;
int grade;
class student *next;
};
student stu[30];
class password
{
public:
char word[10];
};
password words[15]={"start","close","max","min","end","goon","appear","write","fzta","fatz","score","grade","name","open"};
int main()
{
void snam();
void max();
void min();
void za();
void az();
void score();
void grade();
void mulu();
cout<<"a:start"<<endl;
char a;
cin>>a;
if(a=='a')
{
mulu();
}
static int z=0;
for(int i=0;i<999;i++)
{
char k[10];
cin>>k;
if(strcmp(k,words[0].word)==0 )
{
int i;
int k;
cout<<"the number of student: "<<endl;
cin>>k;
char p[10];
cin>>p;
if(strcmp(p,words[7].word)==0)
{
ofstream outfile("f1.dat",ios::in);
if(!outfile)
{
cout<<"error";
}
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(i=0;i<k;i++)
{
z++;
cin>>stu[i].name>>stu[i].score>>stu[i].grade;
outfile<<stu[i].name<<" "<<stu[i].score<<" "<<stu[i].grade<<endl;
}
}
else if(strcmp(p,words[13].word)==0)
{
ifstream infile("f1.dat",ios::in);
if(!infile)
{
cout<<"error";
}
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(i=0;i<k;i++)
{
infile>>stu[i].name>>stu[i].score>>stu[i].grade;
cout<<setw(8)<<stu[i].name<<setw(8)<<stu[i].score<<setw(8)<<stu[i].grade<<endl;
}
}
else if(strcmp(p,words[6].word)==0)
{
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(int j=0;j<z;j++)
{
cout<<stu[j].name <<setw(8)<<stu[j].score <<setw(8)<<stu[j].grade <<endl;
}
}
else if (strcmp(p,words[2].word)==0)
{
max();
}
else if (strcmp(p,words[8].word)==0)
{
za();
}
else if (strcmp(p,words[9].word)==0)
{
az();
}
else if (strcmp(p,words[11].word)==0)
{
grade();
}
else if (strcmp(p,words[10].word)==0)
{
score();
}
else if(strcmp(p,words[12].word)==0)
{
snam();
}
else if(strcmp(p,words[3].word)==0)
{
min();
}
else if(strcmp(p,words[5].word)==0)
{
continue;
}
}
else if(strcmp(k,words[4].word)==0)
break;
}
return 0;
}
void max()
{
char name[10];
double score,t;
int grade;
score=stu[0].score;
strcpy(name,stu[0].name);
grade=stu[0].grade ;
cout<<"the number of students:";
int k;
int i;
cin>>k;
for(i=0;i<k;i++)
{
t=stu[i].score;
if(score<t)
{
score=stu[i].score;
strcpy(name,stu[i].name);
grade=stu[i].grade ;
}
}
cout<<"the max is:"<<endl;
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
cout<<name<<setw(8)<<score<<setw(8)<<grade<<endl;
}
void min()
{
char name[10];
double score,t;
int grade;
int k;
int i=0;
score=stu[0].score;
strcpy(name,stu[0].name);
grade=stu[0].grade ;
cout<<"the number of students:";
cin>>k;
for(i=0;i<k;i++)
{
t=stu[i].score;
if(score>t)
{
score=stu[i].score;
strcpy(name,stu[i].name);
grade=stu[i].grade ;
}
}
cout<<"the min is:"<<endl;
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
cout<<name<<setw(8)<<score<<setw(8)<<grade<<endl;
}
void az()
{
double score;
char name[10];
int i,j,k,grade;
cout<<"the number of student: ";
cin>>k;
for(j=0;j<k-1;j++)
for(i=0;i<k-1-j;i++)
if(stu[i].score >stu[i+1].score )
{
score=stu[i].score ;
stu[i].score =stu[i+1].score ;
stu[i+1].score =score;
grade=stu[i].grade ;
stu[i].grade =stu[i+1].grade ;
stu[i+1].grade =grade;
strcpy(name,stu[i].name );
strcpy(stu[i].name,stu[i+1].name );
strcpy(stu[i+1].name,name);
}
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(i=0;i<k;i++)
cout<<stu[i].name <<setw(8)<<stu[i].score <<setw(8)<<stu[i].grade <<endl;
}
void za()
{
double score;
char name[10];
int i,j,k,grade;
cout<<"the number of student: ";
cin>>k;
for(j=0;j<k-1;j++)
for(i=0;i<k-1-j;i++)
if(stu[i].score <stu[i+1].score )
{
score=stu[i].score ;
stu[i].score =stu[i+1].score ;
stu[i+1].score =score;
grade=stu[i].grade ;
stu[i].grade =stu[i+1].grade ;
stu[i+1].grade =grade;
strcpy(name,stu[i].name );
strcpy(stu[i].name,stu[i+1].name );
strcpy(stu[i+1].name,name);
}
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(i=0;i<k;i++)
cout<<stu[i].name <<setw(8)<<stu[i].score <<setw(8)<<stu[i].grade <<endl;
}
void score()
{
int k,j,t=0;
int grade;
double score;
char name[10];
cout<<"enter the score you want to search: ";
cin>>k;
cout<<"enter the number of student: ";
cin>>j;
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(int i=0;i<j;i++)
{
if(k==stu[i].score )
{
t++;
cout<<stu[i].name <<setw(8)<<stu[i].score <<setw(8)<<stu[i].grade <<endl;
}
}
if(t==0)
{
cout<<"no found"<<endl;
}
}
void grade()
{
int k,j,t=0;
int grade;
double score;
char name[10];
cout<<"enter the grade you want to search: ";
cin>>k;
cout<<"enter the number of student: ";
cin>>j;
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(int i=0;i<j;i++)
{
if(k==stu[i].grade )
{
t++;
cout<<stu[i].name <<setw(8)<<stu[i].score <<setw(8)<<stu[i].grade <<endl;
}
}
if(t==0)
{
cout<<"no found"<<endl;
}
}
void snam()
{
int j,t=0;
int grade;
double score;
char name[10];
char min[10];
cout<<"enter the name you want to search: ";
cin>>min;
cout<<"enter the number of student: ";
cin>>j;
cout<<"name"<<setw(8)<<"score"<<setw(8)<<"grade"<<endl;
for(int i=0;i<j;i++)
{
if(strcmp(min,stu[i].name)==0 )
{
t++;
cout<<stu[i].name <<setw(8)<<stu[i].score <<setw(8)<<stu[i].grade <<endl;
}
}
if(t==0)
{
cout<<"no found"<<endl;
}
}
void mulu()
{
cout<<"open:open *close:close *max:max *min:min"<<endl;
cout<<"end:end *goon:continue *appear:appear *writte:write"<<endl;
cout<<"fzta:za *fatz:az *score:score search *grade:grade search"<<endl;
cout<<"name:name search*start:start"<<endl;
}