main.cpp

这个代码可以将一个10进制数转换为任意进制(16以内),非常实用

#include <iostream>
#include <ostream>
#include <fstream>
using namespace std;

const int JINZHI =16;

void Trans(char *con)
{
	char	content[17]="0123456789ABCDEF";
	int		i;
	int		pos;
	int		temp;
	char	after[500];
	int		is;
	int		j;
	int		k;
	char	res[500];
	int		Positi=0;
	while (1)
	{
		pos=0;
		temp=0;
		while (con[pos]) 
		{
			while (temp<JINZHI  && con[pos])
			{
				temp=temp*10+ con[pos]-'0';
				after[pos]='0';
				pos++;
			}
			
			pos--;
			if (temp% JINZHI >=10 )
			{
				con[pos-1]='1';
				con[pos]=temp%JINZHI -10 +'0';
				i=pos-1;
			}
			else
			{
				con[pos]=temp%JINZHI +'0';
				i=pos;
			}
			after[pos]=temp/JINZHI+'0';
			temp%=JINZHI;
			pos++;
			
		}
		
		after[pos]=0;
		//
		//con----YuShu
		//
		temp=0;
		for (j=i;con[j];j++)
			temp=temp*10+ con[j]-'0';
		//
		//save the result
		//
		res[Positi++]=content[temp];
		//
		//prepare the next loop
		//
		is=0;
		for (j=0;after[j];j++)
		{
			if(after[j]!='0')
				break;
			else
				is=j;
		}
		for (j=is,k=0; after[j]; j++,k++)
			con[k]=after[j];
		con[k]=0;  
		if (strcmp( con,"0")==0 ) 
			break;
	}
	//
	//Last Adjust(delete the last 0s)
	//
	for (i=Positi-1;i>=0;i--)
	{
		if (res[i] != '0')
		{
			is=i;
			break;
		}
	}
	for (i=0,j=is;j>=0;j--)
		con[i++]=res[j];
	con[i++]=0;
	
	
}

#define		LENGTH	200
int main()
{

	char a[LENGTH];
	ofstream	os;
	ifstream	is;
	is.open("Data.txt");
	if( is.fail())
	{
		cout<<"File Miss"<<endl;
		getchar();
		return 0;
	}
	os.open("Result.txt");
	if( os.fail())
	{
		cout<<"Create Error!"<<endl;
		getchar();
		return 0;

	}
	while(!is.eof())
	{
		is.getline(a,LENGTH);
		Trans(a);
		os<<a<<endl;
	}
	is.close();
	os.close();

	
	
	return 1;
}