蓝桥练习 16进制转8进制

蓝桥练习   16进制转8进制

#include<stdio.h>
#include<string>
#include<string.h>
#include<iostream>
using namespace std;
string x0="0000";
string x1="0001";
string x2="0010";
string x3="0011";
string x4="0100";
string x5="0101";
string x6="0110";
string x7="0111";
string x8="1000";
string x9="1001";
string x10="1010";
string x11="1011";
string x12="1100";
string x13="1101";
string x14="1110";
string x15="1111";

string o0="000";
string o1="001";
string o2="010";
string o3="011";
string o4="100";
string o5="101";
string o6="110";
string o7="111";

string s;
string s1;
string s2;
char str[100002];
char str1[400003];
int main()
{
	int i,j;
	int n;
	scanf("%d",&n);
	while(n--)
	{
		s="";
		s2="";
		memset(str1,0,sizeof(str1));
		scanf("%s",str);
		int len =strlen(str);
		for(i=0;i<len;i++)
		{
			switch(str[i])
			{
			case '0':s+=x0;break;
			case '1':s+=x1;break;
			case '2':s+=x2;break;
			case '3':s+=x3;break;
			case '4':s+=x4;break;
			case '5':s+=x5;break;
			case '6':s+=x6;break;
			case '7':s+=x7;break;
			case '8':s+=x8;break;
			case '9':s+=x9;break;
			case 'A':s+=x10;break;
			case 'B':s+=x11;break;
			case 'C':s+=x12;break;
			case 'D':s+=x13;break;
			case 'E':s+=x14;break;
			case 'F':s+=x15;break;
			default :printf("error!!!\n");
			}
		}
		//cout<<s<<endl;
		int len1=s.length();
		int k=0;
		//for(j=0;j<len1;j++)
			//cout<<s[j]<<endl;
		for(j=len1-1;j>=0;j--)
		{
			str1[k++]=(char)s[j];
		}
		//str1[k]='\0';
		str1[k]='0';
		str1[k+1]='0';
		str1[k+2]='0';
		//printf("%s\n",str1);
		for(i=0;i<k+3;i+=3)
		{
			s1="";
			for(j=i+2;j>=i;j--)
			{
				s1+=str1[j];
			}
			if(s1==o0)s2+="0";
			if(s1==o1)s2+="1";
			if(s1==o2)s2+="2";
			if(s1==o3)s2+="3";
			if(s1==o4)s2+="4";
			if(s1==o5)s2+="5";
			if(s1==o6)s2+="6";
			if(s1==o7)s2+="7";
		}
		//cout<<s2<<endl;
		for(i=s2.length()-1;i>=0;i--)
			if(s2[i]!='0')break;
	    for(j=i;j>=0;j--) cout<<s2[j];
		printf("\n");

	}
}