1027. Colors in Mars (20)

People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are for Red, the middle 2 digits for Green, and the last 2 digits for Blue. The only difference
is that they use radix 13 (0-9 and A-C) instead of 16. Now given a color in three decimal numbers (each between 0 and 168), you are supposed to output their Mars RGB values.

Input

Each input file contains one test case which occupies a line containing the three decimal color values.

Output

For each test case you should output the Mars RGB value in the following format: first output "#", then followed by a 6-digit number where all the English characters must be upper-cased. If a single color is only 1-digit long, you must print a "0" to the left.

Sample Input

15 43 71

Sample Output

#123456

IDEA

1.10进制到13进制的转换

2.每个值有两位，如果只求出以为，其高位（左边）需要补零

CODE

#include<iostream>
using namespace std;
void toRadix13(char a[],int n){
int i=0,p;
while(n){
p=n%13;
if(p>=0&&p<=9){
a[i++]=p+'0';
}else if(p==10){
a[i++]='A';
}else if(p==11){
a[i++]='B';
}else if(p==12){
a[i++]='C';
}
n/=13;
}
}
int main(){
int r,g,b;
cin>>r>>g>>b;
char r_num[2]={'0','0'},g_num[2]={'0','0'},b_num[2]={'0','0'};
toRadix13(r_num,r);
toRadix13(g_num,g);
toRadix13(b_num,b);
cout<<"#"<<r_num[1]<<r_num[0]<<g_num[1]<<g_num[0]<<b_num[1]<<b_num[0];
return 0;
}