学步园

下面是字符串数据类型的实现

StringClass.h 文件

#ifndef STRING_CLASS_H
#define STRING_CLASS_H
#include "objectclass.h"
class StringClass:public ObjectClass
{
private:
	char *data;
	int length;
public:
	StringClass();
	StringClass(char *data,int length);
public:
	int Compare(ObjectClass *objcls);
	virtual void OutPut();
	float getValue();
	int getLength();
};
#endif

StringClass.cpp 文件

#include "StringClass.h"
StringClass::StringClass()
{
	data=NULL;
	length=0;
}

StringClass::StringClass(char *data,int length)
{
	this->data=data;
	this->length=length;
}
int StringClass::Compare(ObjectClass *objcls)
{
	if(this->getValue() < objcls->getValue())
	return -1;
	else if(this->getValue() > objcls->getValue())
	return 1;
	else
	return 0;
}
//字符串的值的大小主要看前面几个字母，即按字典顺序比较
//因此越到后面它的权重就越小
float StringClass::getValue()
{
	if(data==NULL)return 0;
	float returnValue = 0;
	for(int i=0;i<length;i++)
	{
	   float mul=1;
	   for(int k=0;k<i;k++)
	      mul=mul*10;
	   returnValue = returnValue+((int)(*(data+i))-(int)'A')/mul;
	}	
	return returnValue;
}
void StringClass::OutPut()
{
	for(int i=0;i<length;i++)
	cout<<*(data+i);
}
int StringClass::getLength()
{
	return length;
}