string1.h

哈夫曼编码器

#include"iostream.h"
#include "string.h"
class String1
{
     private:
		 char *table;
		 int len;
	 public:
		 String1(char *str="");
		 String1(char ch);
		 
		 ~String1();
		 int length();
		 char charAt(int i);
};
String1::String1(char *str)
{
	len=strlen(str);
	table=new char[len+1];
	strcpy(table,str);
}
String1::String1(char ch)
{
	len=1;
	table=new char[len+1];
	table[0]=ch;
	table[1]='\0';
}

String1::~String1()
{
	delete[] table;
	len=0;
}
int String1::length()
{
	return len;
}
char String1::charAt(int i)
{
	if (i>=0&&i<=len)
	{
		return table[i];
	}
	else
		return -1;
}