技術標籤：# PAT (Advanced Level)

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 Specification:

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

Output Specification:

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 its left.

Sample Input:

15 43 71

Sample Output:

#123456

題目大意

• 輸入0~168範圍內的3個10進位制數，將這3個數轉換為十三進位制數
• 先輸出“#”，再連續輸出這3個數對應的十三進位制進位制數

題目解析

因為0~168範圍，最大的十進位制數168轉換為十三進位制數為CC，仍為兩位數，因此可以直接按兩位數的格式輸出：a[num/13]與a[num%13]

#include<iostream>
using namespace std;
int main()
{
	char a[14]={"0123456789ABC"};
	int num;
 

	cout<<"#";
	for(int i=0;i<3;i++)
	{
		cin>>num;
		cout<<a[num/13]<<a[num%13];
	}
	return 0;
 }