PAT甲级1027

题目

1027 Colors in Mars (20)（20 分）
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

---

实现

#include<iostream>
using namespace std;
int main(){
  //先考虑范围，再考虑规律
  int n;
  char c[14]={"0123456789ABC"};
  cout<<"#";
  for(int i=0;i<3;i++){
    cin>>n;

  cout<<c[n/13]<<c[n%13];
  }
  return 0;
}

特别要注意的是，声明的字符数组，它的大小是肉眼可见的字符数+1（有“\0”这个字符）。
不能忘记0~168这个范围。不能忘记位数不够前面补0的要求。