class.cpp

用C++写的一个简单学籍管理系统

#include "class.h"
#include <assert.h>

Class::Class(const char* name,int id)
:name(name),id(id)
{
	total = 0;    //刚建班时人数为0
}
Class::Class(const Class &cl)
:name(cl.name),id(cl.id),total(cl.total),students(cl.students)
{

}

Class::~Class()
{
}
const int Class::getTotal()const
{
	return total;
	assert(total==students.size());
}

const string Class::getName()const
{
	return name;
}
const int Class::getId()const
{
	return id;
}
void Class::setId(const int id)
{
	Class::id = id;
}
void Class::setName(const char *n)
{
	assert(n!=NULL);
	name = n;
}

void Class::addStudent( Student &s)
{
	students.push_back(s);
	total++;
	assert(total==students.size());
}

bool Class::deleteStudent( Student & s)
{
	return deleteStudent(s.getId());
}
bool Class::deleteStudent(  int id)
{

	list<Student>::iterator iBegin = students.begin();
	list<Student>::iterator iEnd = students.end();
	while((*iBegin).getId() != id)
	{
		iBegin++;
	}
	if(iBegin==iEnd)return false;
	else 
	{
		students.erase(iBegin);
		return true;
	}
}
void Class::setCompareFlag( COMPARE flag)
{
	list<Student>::iterator iBegin = students.begin();
	list<Student>::iterator iEnd = students.end();
	while (iBegin!=iEnd)
	{
		(*iBegin).setFlag(flag);
		iBegin++;
	}
}
void Class::sort()
{
	students.sort();
}

float Class::getSumScoreOfClass()
{
	list<Student>::iterator iBegin = students.begin();
	list<Student>::iterator iEnd = students.end();
	float sumScore=0.0f;
	while (iBegin!=iEnd)
	{
		sumScore+=(*iBegin).getSumScore();
		iBegin++;
	}
	return sumScore;
}
float Class::getSumScoreOfCourse(const Course&c)
{
	float sumScoreOfCourse=0.0f;
	list<Student>::iterator isBegin = students.begin();
	list<Student>::iterator isEnd = students.end();

	while (isBegin!=isEnd)
	{
		list<Course>::iterator icBegin = (*isBegin).courses.begin();
		list<Course>::iterator icEnd = (*isBegin).courses.end();
		while (icBegin!=icEnd)
		{
			if( (*icBegin)==c )
			{
				sumScoreOfCourse+=(*icBegin).getScore();
				break;
			}
			icBegin++;
		}
		isBegin++;
	}
	return total>0?sumScoreOfCourse:-0.1f;
}

float Class::getPassRateOfCourse(const Course &c)
{
	list<Student>::iterator isBegin = students.begin();
	list<Student>::iterator isEnd = students.end();

	int passNum=0;
	int num=0;
	while (isBegin!=isEnd)
	{
		list<Course>::iterator icBegin = (*isBegin).courses.begin();
		list<Course>::iterator icEnd = (*isBegin).courses.end();
		while (icBegin!=icEnd)
		{
			if( (*icBegin)==c )
			{
				num++;
				if ((*icBegin).getScore()>=60.0)
				{
					passNum++;
				}
				break;
			}
			icBegin++;
		}
		isBegin++;
	}
	return total>0?(float)passNum/num:-1.0f; 
}
int Class::getStudentNumberOfCourse(const Course &c)
{
	list<Student>::iterator isBegin = students.begin();
	list<Student>::iterator isEnd = students.end();

	int passNum=0;
	while (isBegin!=isEnd)
	{
		list<Course>::iterator icBegin = (*isBegin).courses.begin();
		list<Course>::iterator icEnd = (*isBegin).courses.end();
		while (icBegin!=icEnd)
		{
			if( (*icBegin)==c )
			{
				passNum++;
				break;
			}
			icBegin++;
		}
		isBegin++;
	}
	return passNum;
}
float Class::getAvgScoreOfCourse(const Course &c)
{
	float sumScore=getSumScoreOfCourse(c);
	int num = getStudentNumberOfCourse(c);
	if (sumScore<0||total==0)
	{
		return -1.0f;
	}
	else return sumScore/num;       
}
void Class::write( ostream& os)
{
	assert(total==students.size());
	os<<name<<'#';
	os<<id<<'#';
	os<<total<<'#';

	list<Student>::iterator iBegin = students.begin();
	list<Student>::iterator iEnd = students.end();
	while(iBegin!=iEnd)
	{
		(*iBegin).write(os);
		iBegin++;
	}
}
void Class::read( istream & is)
{
	char tpName[20];
	is.get(tpName,20,'#');
	name = tpName;
	is.ignore();
	is>>id;
	is.ignore();
	is>>total;
	is.ignore();

	Student student("");
	if(!Class::students.empty())Class::students.clear();
	for(int i=0;i<total;i++)
	{
		
		student.read(is);
		Class::students.push_back(student);
	}
}

bool Class::operator ==(const Class & cl)
{
	return (id==cl.id);
}
void Class::printBase()
{
	cout<<setw(20)<<id<<setw(20)<<name<<setw(20)<<total;
}
void Class::printDetail()
{
	list<Student>::iterator iter=students.begin();
	while (iter!=students.end())
	{
		(*iter).printBase();
		cout<<endl;
		iter++;
	}
}