题目:http://pat.zju.edu.cn/contests/pat-a-practise/1027
简单题,考察十进制数和n进制数的转换和输出格式的控制。
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
#include<iostream>
#include<string.h>
using namespace std; char red[2];
char green[2];
char blue[2]; void change(int a,char color[2],int base)
{
int i=0;
do
{
if( (a%base)<10 )
color[i++] = ((a%base) + '0');
else
color[i++] = (a%base) + 'A' - 10;
a /= base;
} while (a != 0);
} int main()
{
memset(red,'0',sizeof(red));
memset(green,'0',sizeof(green));
memset(blue,'0',sizeof(blue));
int base = 13;
int a,b,c;
int n;
cin>>a>>b>>c;
change(a,red,base);
change(b,green,base);
change(c,blue,base);
cout<<"#";
cout<<red[1]<<red[0];
cout<<green[1]<<green[0];
cout<<blue[1]<<blue[0]<<endl; return 0;
}